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Variable Interest Entities (Details Textual) - USD ($)
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Variable Interest Entities      
Impairment losses $ 0 $ 0  
Other assets      
Variable Interest Entities      
Carrying value of equity investments in LIHTCs $ 45,012,000   $ 41,521,000
CDE      
Variable Interest Entities      
Tax credit period 7 years    
LIHTC      
Variable Interest Entities      
Tax credit period 10 years    
Tax credit compliance period 15 years