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Junior Subordinated Debentures (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
May 01, 2014
Debt Instrument [Line Items]        
Junior subordinated debentures $ 20,668   $ 20,595  
Adjustable rate of trust preferred securities 3.01%      
Junior Subordinated Debentures        
Debt Instrument [Line Items]        
Weighted average rate 5.56% 7.06%    
Washington Banking        
Debt Instrument [Line Items]        
Assumed trust preferred securities and junior subordinated debentures, fair value       $ 18,900