Accumulated Other Comprehensive Loss - Summary of Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Summary of changes in accumulated other comprehensive loss
Beginning Balance	$ 533,111	$ 592,584	$ 686,799
Total other comprehensive (loss) income, net of tax	339	787	(3,968)
Ending Balance	529,670	533,111	592,584
Accumulated Other Comprehensive (Loss) Income
Summary of changes in accumulated other comprehensive loss
Beginning Balance	(674)	(1,461)	2,507
Other comprehensive income (loss) before reclassifications	391	(2,127)
Amounts reclassified from accumulated other comprehensive loss	(52)	2,914
Total other comprehensive (loss) income, net of tax	339	787	(3,968)
Ending Balance	(335)	(674)	(1,461)
Unrealized (loss) and gain on available for sale securities
Summary of changes in accumulated other comprehensive loss
Beginning Balance	(674)	(1,461)
Other comprehensive income (loss) before reclassifications	642	(2,127)
Amounts reclassified from accumulated other comprehensive loss	(52)	2,914
Total other comprehensive (loss) income, net of tax	590	787
Ending Balance	(84)	$ (674)	$ (1,461)
Unrealized loss Cash flow hedge, Interest rate swap
Summary of changes in accumulated other comprehensive loss
Other comprehensive income (loss) before reclassifications	(251)
Total other comprehensive (loss) income, net of tax	(251)
Ending Balance	$ (251)