Goodwill and Intangible Assets - Deposits Purchased Premium (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Deposits Purchased Premium
Accretion period			5 years
Balance at the beginning of the period			$ 27
Liberty Bell Bank acquisition					$ 108
Accretion	$ (6)	$ (27)	(19)	$ (63)	(81)
Balance at the end of the period	8		8		$ 27
Remainder of 2019	4		4
Thereafter	$ 4		$ 4