Income Taxes (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 5,806	$ 6,443
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Balance, beginning of year	10,209	9,985
Increase based on tax positions related to prior years	1,278	5,725
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	0	(767)
Reductions related to settlements	(684)	(3,795)
Reductions for tax positions as a result of a lapse of the applicable statute of limitations	(1,231)	(939)
Balance, end of year	$ 9,572	$ 10,209