Income Taxes (Provision for Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current (benefit) expense:
Federal	$ (36,159)	$ (2,884)	$ 21,055
State	(1,282)	3,585	8,676
Foreign and U.S. territories	11,130	5,299	5,550
Total current (benefit) expense:	(26,311)	6,000	35,281
Deferred expense (benefit):
Federal	38,667	(43,579)	(1,773)
State	10,608	(27,566)	1,278
Foreign and U.S. territories	(1,022)	(464)	46
Total deferred expense (benefit):	48,253	(71,609)	(449)
Total expense (benefit):	$ 21,942	$ (65,609)	$ 34,832