Investments - Schedule of Investments (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Equity Method Investment Balances [Roll Forward]
Investment in WMES joint ventures at beginning of the period	$ 53,275	$ 57,936
Earnings from joint ventures	800	2,642
Distribution		(7,200)
Foreign currency translation adjustment	398	1,018
Unrealized gain (loss) on derivative instruments at joint venture	1,454	(1,121)
Investment in WMES joint ventures at end of the period	55,927	53,275
WMES
Equity Method Investment Balances [Roll Forward]
Investment in WMES joint ventures at beginning of the period	37,365	44,134
Earnings from joint ventures	250	1,552
Distribution		(7,200)
Foreign currency translation adjustment	0	0
Unrealized gain (loss) on derivative instruments at joint venture	1,454	(1,121)
Investment in WMES joint ventures at end of the period	39,069	37,365
CASC Willis
Equity Method Investment Balances [Roll Forward]
Investment in WMES joint ventures at beginning of the period	15,910	13,802
Earnings from joint ventures	550	1,090
Distribution		0
Foreign currency translation adjustment	398	1,018
Unrealized gain (loss) on derivative instruments at joint venture	0	0
Investment in WMES joint ventures at end of the period	$ 16,858	$ 15,910

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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The cash inflow from the sale of an investment interest in a joint venture that the reporting entity has not previously accounted for using consolidation or the equity method of accounting.

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Equity Method Investment Balances

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Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), After Reclassification, Before Tax, Joint Venture

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