Goodwill and Other Intangible Assets - Acquired intangible assets subject to amortization (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Total	$ 2,281
Core deposit [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,590	$ 3,590
Accumulated Amortization	(1,309)	(784)
Total	$ 2,281	$ 2,806