Income Taxes (Provision for Income Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
U.S. Federal:
Current									$ (7,419)	$ (10,582)	$ (18,789)
Deferred									(13,825)	6,516	11,500
U.S. Federal: Total									(21,244)	(4,066)	(7,289)
U.S. State and Local:
Current									5,401	(2,569)	(9,142)
Deferred									(5,827)	4,100	8,000
U.S. State and Local: Total									(426)	1,531	(1,142)
International:
Current									10,979	4,993	9,993
Deferred									(231)	4,664	(14,689)
International: Total									10,748	9,657	(4,696)
Total current									8,961	(8,158)	(17,938)
Total deferred									(19,883)	15,280	4,811
(Benefit) provision for income taxes	$ (320)	$ (1,525)	$ 4,915	$ (13,992)	$ (350)	$ 541	$ 16,957	$ (10,026)	$ (10,922)	$ 7,122	$ (13,127)
Effective tax rate									147.30%	(3.90%)	(49.10%)