Accumulated Other Comprehensive Loss - Summary of Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Summary of changes in accumulated other comprehensive loss
Beginning Balance	$ 542,140	$ 549,540	$ 533,111	$ 592,584
Total other comprehensive (loss) income, net of tax	(420)	311	184	1,159
Ending Balance	522,550	534,102	522,550	534,102
Accumulated Other Comprehensive (Loss) Income
Summary of changes in accumulated other comprehensive loss
Beginning Balance	(70)	(613)	(674)	(1,461)
Other comprehensive income (loss) before reclassifications			243
Amounts reclassified from accumulated other comprehensive loss			(59)
Total other comprehensive (loss) income, net of tax	(420)	311	184
Ending Balance	(490)	(302)	(490)	(302)
Unrealized (loss) gain on available for sale securities
Summary of changes in accumulated other comprehensive loss
Beginning Balance			(674)
Other comprehensive income (loss) before reclassifications			628
Amounts reclassified from accumulated other comprehensive loss	(61)		(59)
Total other comprehensive (loss) income, net of tax		$ 311	569	$ 1,159
Ending Balance	(105)		(105)
Unrealized (loss) gain, Cash flow hedge, Interest rate swap
Summary of changes in accumulated other comprehensive loss
Other comprehensive income (loss) before reclassifications	(385)		(385)
Total other comprehensive (loss) income, net of tax			(385)
Ending Balance	$ (385)		$ (385)