Shareholders' Equity - Schedule of accumulated other comprehensive income (loss), net (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax
Beginning balance	$ 147,499	$ 149,048	$ 142,616	$ 141,374	$ 149,048	$ 141,374	$ 141,374
Other comprehensive income before reclassifications, net of tax					688		577
Other comprehensive (loss) income, net of tax	141	547	273	367	688		577
Ending balance	149,757	147,499	145,916	142,616	149,757	145,916	149,048
Other comprehensive income before reclassifications, tax provision					289
Other comprehensive income, tax					289
Unrealized Gain (Loss) on Securities Available-for-Sale, net of tax
Accumulated Other Comprehensive Income (Loss), Net of Tax
Beginning balance		(567)		(1,144)	(567)	(1,144)	(1,144)
Other comprehensive income before reclassifications, net of tax					688		577
Other comprehensive (loss) income, net of tax					688		577
Ending balance	121				121		(567)
Other comprehensive income before reclassifications, tax provision					289	242
Other comprehensive income, tax					289	242
Accumulated Other Comprehensive Income (Loss), Net
Accumulated Other Comprehensive Income (Loss), Net of Tax
Beginning balance	(20)	(567)	(777)	(1,144)	(567)	(1,144)	(1,144)
Other comprehensive (loss) income, net of tax	141	547	273	367
Ending balance	$ 121	$ (20)	$ (504)	$ (777)	$ 121	$ (504)	$ (567)