Income Taxes (Income Tax Provision) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ 1,079	$ (549)	$ (1,668)
State and local	1,215	323	643
Foreign	4,361	1,138	1,125
Total current income tax provision	6,655	912	100
Deferred:
Federal	4,409	10,073	(61,655)
State and local	1,925	578	(2,107)
Foreign	62	367	528
Total deferred income tax provision	6,396	11,018	(63,234)
Federal	5,488	9,525	(63,323)
State and local	3,140	901	(1,464)
Foreign	4,423	1,505	1,653
Total income tax expense	$ 13,051	$ 11,931	$ (63,134)