Income Taxes (Income Tax Provision) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current:
Federal	$ (549)	$ (1,668)	$ (702)
State and local	323	643	199
Foreign	1,138	1,125	1,385
Total current income tax provision	912	100	882
Deferred:
Federal	10,073	(61,655)	3,523
State and local	578	(2,107)	1,696
Foreign	367	528	810
Total deferred income tax provision	11,018	(63,234)	6,029
Federal	9,525	(63,323)	2,821
State and local	901	(1,464)	1,895
Foreign	1,505	1,653	2,195
Total income tax expense	$ 11,931	$ (63,134)	$ 6,911