Income Taxes - Deferred Income Taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred Tax Assets
Net operating loss and other tax credit carryforwards	$ 52,375	$ 63,454
Basis differences — foreign investments	35,553	62,099
Unearned and deferred compensation	0	643
Other	1,017	1,242
Total deferred tax assets	88,945	127,438
Valuation allowance	(69,800)	(106,185)
Net deferred tax assets	19,145	21,253
Deferred Tax Liabilities
Basis differences — foreign investments	(181,277)	(179,761)
Total deferred tax liabilities	(181,277)	(179,761)
Net Deferred Tax Liability	$ (162,132)	$ (158,508)