Income Taxes - Components of Provision for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal									$ 72,712	$ 80,690	$ 85,371
Foreign									6,134	7,360	9,796
State and Local									26,703	24,451	14,955
Total Current									105,549	112,501	110,122
Deferred:
Federal									(2,169)	(4,771)	150,800
Foreign									(5,022)	(61)	(3,464)
State and Local									(3,312)	851	984
Total Deferred									(10,503)	(3,981)	148,320
Total	$ 34,793	$ 20,402	$ 32,030	$ 7,821	$ 60,502	$ 17,539	$ 25,541	$ 4,938	$ 95,046	$ 108,520	$ 258,442