Income Taxes (Benefit of) Provision for Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Benefit of income taxes	$ 0	$ 0	$ (239)
Deferred:
Total deferred	3,303	4,781	(7,105)
Provision for income taxes	19,672	16,136	14,943
Continuing Operations
Current:
U.S. Federal	11,279	9,402	16,882
State	3,551	3,144	2,479
Foreign	1,539	(1,191)	2,687
Total current	16,369	11,355	22,048
Deferred:
U.S. Federal	2,917	4,158	(7,466)
State	509	1,047	1,246
Foreign	(123)	(424)	(885)
Total deferred	3,303	4,781	(7,105)
Provision for income taxes	19,672	16,136	14,943
Discontinued Operations
Current:
U.S. Federal	0	0	219
State	0	0	20
Foreign	0	0	0
Benefit of income taxes	$ 0	$ 0	$ 239