Annual report pursuant to Section 13 and 15(d)

Servicing Assets and Liabilities (Details)

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Servicing Assets and Liabilities (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Servicing Asset at Amortized Cost, Balance [Roll Forward]      
Balance at beginning of period $ 10,564 $ 11,744  
Addition related to sale of SBA loans 2,590 2,184  
Amortization (3,266) (3,364)  
Reversal of allowance 330 0  
Balance at end of period 10,218 10,564 $ 11,744
Balance at beginning of period 3,143 4,784  
Amortization (859) (1,641)  
Reversal of allowance (67) 0  
Balance at end of period 2,217 3,143 4,784
Serviced loans sold to unaffiliated parties 476,500 484,700  
Servicing fee income 4,700 4,700 4,600
Net amortization expense $ 2,400 $ 1,700 $ 3,100