Junior Subordinated Debentures (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2007	May 01, 2014
Debt Instrument [Line Items]
Junior subordinated debentures	$ 20,595	$ 20,302
Issued amount				$ 25,000
Debt term				30 years
Adjustable rate of trust preferred securities	3.47%
Junior Subordinated Debentures
Debt Instrument [Line Items]
Weighted average rate	6.55%	6.27%	5.11%
LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)				1.56%
Washington Banking
Debt Instrument [Line Items]
Assumed trust preferred securities and junior subordinated debentures, fair value					$ 18,900