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Investments - Narratives (Details) € / shares in Units, $ / shares in Units, $ / shares in Units, € in Millions, $ in Millions |  |  | 3 Months Ended | 12 Months Ended |
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Dec. 15, 2021 EUR (€) € / shares shares | Sep. 07, 2021 USD ($) | Sep. 07, 2021 CAD ($) | Jun. 30, 2021 USD ($) | Jun. 30, 2021 EUR (€) | Mar. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) shares | Dec. 31, 2020 CAD ($) | Dec. 31, 2021 USD ($) $ / shares shares | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($) | Sep. 07, 2021 $ / shares
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Equity investments, carrying value |  |  |  |  |  |  |  | $ 5,300,000 |  | $ 99,600,000 | $ 5,300,000 |  |
Equity in earnings of unconsolidated affiliates, net |  |  |  |  |  |  |  |  |  | 300,000 | 0 | $ 0 |
New investments |  |  |  |  |  |  |  |  |  | 45,200,000 | 50,800,000 |  |
Unrealized (loss) gain on investment |  |  |  |  |  |  |  |  |  | 3,200,000 | 14,100,000 |  |
Payments to acquire investments | [1] |  |  |  |  |  |  |  |  | 103,900,000 | 50,800,000 | 3,300,000 |
Investments in equity securities |  |  |  |  |  |  |  | $ 73,600,000 |  | $ 77,800,000 | 73,600,000 | 6,900,000 |
Share price (usd per share) | $ / shares |  |  |  |  |  |  |  |  |  | $ 159.49 |  |  |
Realized gain on investment in equity securities |  |  |  |  |  |  |  |  |  | $ 2,600,000 | $ 0 | 0 |
Common stock, shares issued (shares) | shares |  |  |  |  |  |  |  | 36,185,829 |  | 36,548,330 | 36,185,829 |  |
Hydrogen Fund |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Equity investments, carrying value | € |  | € 50.0 |  |  |  |  |  |  |  |  |  |  |
Commit to invest | € |  | € 100.0 |  |  |  |  |  |  |  |  |  |  |
Hydrogen Fund | Capital Commitment Condition One |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate capital commitments (in percent) |  | 15.00% |  |  |  |  |  |  |  |  |  |  |
Hydrogen Fund | Capital Commitment Condition Two |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate capital commitments (in percent) |  | 20.00% |  |  |  |  |  |  |  |  |  |  |
Nonconsolidated Investee or Group of Investees |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Equity investments, carrying value |  |  |  |  |  |  |  | $ 5,300,000 |  | $ 99,600,000 | $ 5,300,000 | 6,500,000 |
Equity in earnings of unconsolidated affiliates, net |  |  |  |  |  |  |  |  |  | 400,000 | (700,000) |  |
New investments |  |  |  |  |  |  |  |  |  | 58,700,000 |  |  |
Nonconsolidated Investee or Group of Investees | Other Investments |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Equity in earnings of unconsolidated affiliates, net |  |  |  |  |  |  |  |  |  | 400,000 |  |  |
Class A1 | Hydrogen Fund |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Share price (usd per share) | € / shares |  | € 100 |  |  |  |  |  |  |  |  |  |  |
Common stock, shares issued (shares) | shares |  | 500,000 |  |  |  |  |  |  |  |  |  |  |
Class A1 | Hydrogen Fund | Capital Commitment Condition One |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Investment interest rate |  | 7.00% |  |  |  |  |  |  |  |  |  |  |
Class A1 | Hydrogen Fund | Capital Commitment Condition Two |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Investment interest rate |  | 6.50% |  |  |  |  |  |  |  |  |  |  |
HTEC |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Share price (usd per share) | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  | $ 24.33
Hydrogen Fund |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate capital commitments | € |  | € 1,500.0 |  |  |  |  |  |  |  |  |  |  |
Investment term (in years) |  | 12 years |  |  |  |  |  |  |  |  |  |  |
Maximum capital call, (in percent) |  | 30.00% |  |  |  |  |  |  |  |  |  |  |
Hydrogen Fund | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate capital commitments | € |  | € 1,800.0 |  |  |  |  |  |  |  |  |  |  |
Investment in Equity Securities Level 1 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
New investments |  |  |  |  |  |  |  |  |  | 0 | 35,100,000 |  |
Unrealized (loss) gain on investment |  |  |  |  |  |  |  |  |  | (19,700,000) | 17,000,000.0 |  |
Investments in equity securities |  |  |  |  |  |  |  | 53,800,000 |  | 31,300,000 | 53,800,000 | 0 |
Realized gain on investment in equity securities |  |  |  |  |  |  |  |  |  | 0 |  |  |
Level 2 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
New investments |  |  |  |  |  |  |  |  |  | 0 | 0 |  |
Unrealized (loss) gain on investment |  |  |  |  |  |  |  |  |  | 2,200,000 | (2,900,000) |  |
Investments in equity securities |  |  |  |  |  |  |  | 4,100,000 |  | 6,200,000 | 4,100,000 | 6,900,000 |
Realized gain on investment in equity securities |  |  |  |  |  |  |  |  |  | $ 0 |  |  |
Squared Capital | Corporate Joint Venture | Anniversary Period One |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholder distribution threshold |  |  | $ 900,000,000.0 |  |  |  |  |  |  |  |  |  |
Hudson Products de Mexico S.A. de CV | Nonconsolidated Investee or Group of Investees |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Equity investments, ownership interest |  |  |  |  |  |  |  |  |  | 50.00% |  |  |
Equity investments, carrying value |  |  |  |  |  |  |  | 2,800,000 |  | $ 3,300,000 | 2,800,000 |  |
Equity in earnings of unconsolidated affiliates, net |  |  |  |  |  |  |  |  |  | 500,000 | 300,000 | 200,000 |
McPhy |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized (loss) gain on investment |  |  |  |  |  |  |  |  |  | 19,700,000 | 17,000,000.0 |  |
Investments in equity securities |  |  |  |  |  |  |  | 53,800,000 |  | 31,300,000 | 53,800,000 |  |
Stabilis Energy, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized (loss) gain on investment |  |  |  |  |  |  |  |  |  |  | 2,900,000 | 100,000 |
Investments in equity securities |  |  |  |  |  |  |  | 4,100,000 |  | 6,200,000 | 4,100,000 |  |
Earthly Labs Inc. |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Equity investments, ownership interest |  |  |  |  | 15.00% | 15.00% |  |  |  |  |  |  |
Shares owned (shares) |  |  |  |  | 15.00% | 15.00% |  |  |  |  |  |  |
Payments to acquire investments |  |  |  |  | $ 5,000,000.0 |  |  |  |  |  |  |  |
Realized gain on investment in equity securities |  |  |  |  |  |  |  |  |  | $ 2,600,000 |  |  |
Transform Materials |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Shares owned (shares) |  |  |  |  |  |  | 5.00% |  |  |  |  |  |
Payments to acquire investments |  |  |  |  |  |  | $ 25,100,000 |  |  |  |  |  |
Svante Inc. |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Shares owned (shares) |  |  |  |  |  |  | 10.00% |  |  |  |  |  |
Payments to acquire investments |  |  |  |  |  |  | $ 15,100,000 |  |  |  |  |  |
Liberty LNG |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Equity in earnings of unconsolidated affiliates, net |  |  |  |  |  |  |  |  |  |  | 0 |  |
Liberty LNG | Nonconsolidated Investee or Group of Investees |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Equity investments, ownership interest |  |  |  |  |  |  |  |  |  | 25.00% |  |  |
Equity investments, carrying value |  |  |  |  |  |  |  | $ 2,100,000 |  | $ 2,400,000 | 2,100,000 |  |
Equity in earnings of unconsolidated affiliates, net |  |  |  |  |  |  |  |  |  | 300,000 | $ (1,000,000.0) | $ 0 |
Cryomotive GmbH | Nonconsolidated Investee or Group of Investees |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Equity investments, ownership interest |  |  |  |  | 24.90% | 24.90% |  |  |  |  |  |  |
Equity investments, carrying value |  |  |  |  |  |  |  |  |  | 7,100,000 |  |  |
Equity in earnings of unconsolidated affiliates, net |  |  |  |  |  |  |  |  |  | (600,000) |  |  |
New investments |  |  |  |  | $ 8,200,000 | € 6.8 |  |  |  |  |  |  |
HTEC | Nonconsolidated Investee or Group of Investees |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Equity investments, ownership interest |  |  | 25.00% |  |  |  |  | 15.60% |  |  | 15.60% |  |
Equity investments, carrying value |  |  |  |  |  |  |  |  |  | 86,400,000 |  |  |
Equity in earnings of unconsolidated affiliates, net |  |  |  |  |  |  |  |  |  | $ 200,000 |  |  |
New investments |  |  | $ 50,500,000 | $ 63.5 |  |  |  | $ 15,700,000 | $ 20.0 |  |  |  |
Unrealized (loss) gain on investment |  |  | $ 20,700,000 |  |  |  |  |  |  |  |  |  |
HTEC | Corporate Joint Venture | Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Right of refusal compensation percentage (percent) |  |  | 102.00% |  |  |  |  |  |  |  |  |  |
HTEC | Corporate Joint Venture | Anniversary Period One |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Put option internal rate of return (percent) |  |  | 10.00% |  |  |  |  |  |  |  |  |  |
HTEC | Corporate Joint Venture | Anniversary Period One | Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Invested capital multiple rate |  |  | 1.65 |  |  |  |  |  |  |  |  |  |
HTEC | Corporate Joint Venture | Anniversary Period Two |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Put option internal rate of return (percent) |  |  | 12.50% |  |  |  |  |  |  |  |  |  |
HTEC | Corporate Joint Venture | Anniversary Period Two | Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Invested capital multiple rate |  |  | 1.65 |  |  |  |  |  |  |  |  |  |
Percentage of shares callable upon exercise of call option (percent) |  |  | 20.00% |  |  |  |  |  |  |  |  |  |
HTEC | Corporate Joint Venture | Squared Capital |  |  |  |  |  |  |  |  |  |  |  |  |
Debt and Equity Securities, FV-NI |  |  |  |  |  |  |  |  |  |  |  |  |
Equity investments, ownership interest |  |  | 35.00% |  |  |  |  |  |  |  |  |  |
New investments |  |  |  | $ 153.0 |  |  |  |  |  |  |  |  |
[1] | Non-cash investing activities of $7.0 related to the conversion of a note receivable into an investment in equity securities in Stabilis Energy, Inc. during the year ended December 31, 2019.

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