Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Current federal	$ 2,682	$ 18,640	$ 40,440
Current state and local	4,901	4,631	5,729
Current foreign	4,301	2,501	3,188
Total current	11,884	25,772	49,357
Deferred federal, state and local	15,525	(41,133)	5,766
Deferred foreign	(4,266)	5,363	4,896
Total deferred	11,259	(35,770)	10,662
Total provision (benefit) for income taxes	$ 23,143	$ (9,998)	$ 60,019