Income Taxes - Provision For Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current, Federal	$ 4,877,000	$ 82,484,000	$ 136,202,000
Current, State	2,614,000	6,421,000	23,134,000
Current, Foreign	19,560,000	23,328,000	29,823,000
Total Current	27,051,000	112,233,000	189,159,000
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Deferred, Federal	(30,779,000)	18,760,000	(23,181,000)
Deferred, State	(11,579,000)	402,000	(6,787,000)
Deferred, Foreign	(1,721,000)	2,385,000	(4,013,000)
Total, Deferred	(44,079,000)	21,547,000	(33,981,000)
Total Current and Deferred	$ (17,028,000)	$ 133,780,000	$ 155,178,000