Income Taxes - Reconciliation of Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes
Computed expected federal income tax expense	$ 65,470	$ 86,490	$ 115,168
Effect of noncontrolling interest income distribution	(8,558)	(8,401)	(13,724)
Change in valuation allowance	15,469	1,663	413
Effect of state and local income taxes, net of federal tax benefit	18,622	12,980	10,767
Deductible compensation in excess of book	(2,029)	(5,392)	(13,757)
Nondeductible compensation	635	1,167	2,201
Effect of foreign income taxes	2,084	4,544	2,367
Effect of foreign earnings earned and remitted in the same year	(302)	2,317	4,402
Effect of foreign tax credits	(407)	(996)	(5,357)
Effect of Tax Reform, including change in valuation allowance of $20,824	0	0	(84,599)
Other, net	958	1,483	(1,855)
Income Tax Expense (Benefit), Total	$ 91,942	$ 95,855	16,026
Valuation Allowance			$ 20,824