| 2026-08-05 | 10-Q | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2026-04-30 | 10-Q | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2026-02-12 | 10-K | Stock registered under Section 12(b) | Common Stock, par value $0.01 per share · HCC · NYSE |
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| 2026-02-12 | 10-K | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2025-11-05 | 10-Q | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2025-08-06 | 10-Q | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2025-04-30 | 10-Q | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2025-02-13 | 10-K | Stock registered under Section 12(b) | Common Stock, par value $0.01 per share · HCC · NYSE |
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| 2025-02-13 | 10-K | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2024-10-30 | 10-Q | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2024-08-01 | 10-Q | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2024-05-01 | 10-Q | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2024-02-14 | 10-K | Stock registered under Section 12(b) | Common Stock, par value $0.01 per share · HCC · NYSE |
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| 2024-02-14 | 10-K | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2023-11-01 | 10-Q | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2023-08-02 | 10-Q | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2023-05-18 | 10-K/A | Stock registered under Section 12(b) | Common Stock, par value $0.01 per share · HCC · NYSE |
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| 2023-05-18 | 10-K/A | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2023-05-03 | 10-Q | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2023-02-15 | 10-K | Public float as of 2022-06-30 | $1.90B |
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| 2023-02-15 | 10-K | Stock registered under Section 12(b) | Common Stock, par value $0.01 per share · HCC · NYSE |
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| 2023-02-15 | 10-K | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2022-11-02 | 10-Q | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2022-08-03 | 10-Q | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2022-05-05 | 10-Q | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2022-02-22 | 10-K | Stock registered under Section 12(b) | Common Stock, par value $0.01 per share · HCC · NYSE |
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| 2022-02-22 | 10-K | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2021-11-02 | 10-Q | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2021-08-04 | 10-Q | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2021-05-05 | 10-Q | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2021-02-24 | 10-K | Stock registered under Section 12(b) | Common Stock, par value $0.01 per share · HCC · NYSE |
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| 2021-02-24 | 10-K | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2020-10-28 | 10-Q | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2020-08-05 | 10-Q | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2020-04-29 | 10-Q | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2020-02-19 | 10-K | Stock registered under Section 12(b) | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share · NYSE |
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| 2018-02-14 | 10-K | Well-known seasoned issuer | No |
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