Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive loss, net of tax	$ 747	$ 3,364
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive loss - Beginning Balance	(24,309)	(19,229)
Other comprehensive income before reclassifications, net		3,364
Net current-period other comprehensive income	747	3,364
Accumulated other comprehensive loss - Ending Balance	(23,562)	(15,865)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive loss, net of tax	$ 747	$ 3,364