Income Taxes - Reconciliation of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income (loss) tax provision computed at statutory federal income tax rates	$ (9,389)	$ (12,560)
Partnership (earnings) losses	9,389	12,560
Corporate subsidiary earnings (loss) subject to federal tax	(485)	(1,800)
Valuation allowances	1,865	2,133
Income tax expense attributable to foreign earnings	3,362	1,934
State income taxes (net of federal benefit)	57	764
Other	153	113
Total tax provision	$ 4,952	$ 3,144