XML 109 R98.htm IDEA: XBRL DOCUMENT v3.10.0.1
Commitments and Contingent Liabilities - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Jun. 30, 2018
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Commitments And Contingencies Liabilities [Line Items]          
Rental expenses   $ 1,400,000 $ 1,100,000 $ 4,200,000 $ 3,400,000
Sublease income   223,000 166,000 569,000 526,000
Minimum rental to be received in future on subleases   1,500,000   $ 1,500,000  
Sublease contract maturity year       2025  
Data processing   $ 2,724,000 $ 2,399,000 $ 15,396,000 $ 7,255,000
Fixed rate loan commitments maturity year       2048  
Variable rate loan commitments maturity year       2048  
Maximum          
Commitments And Contingencies Liabilities [Line Items]          
Commitments to make loans period       90 days  
Loan commitments fixed interest rate   20.00%   20.00%  
Loan commitments variable interest rate   15.00%   15.00%  
Minimum          
Commitments And Contingencies Liabilities [Line Items]          
Loan commitments fixed interest rate   2.00%   2.00%  
Loan commitments variable interest rate   2.45%   2.45%  
Contract termination          
Commitments And Contingencies Liabilities [Line Items]          
Data processing $ 8,100,000