SUMMARY OF QUARTERLY FINANCIAL DATA (UNAUDITED) - ADDITIONAL DISCLOSURES (Details) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Consolidated quarterly financial data                      
Provision for loan and lease losses $ 5,004,000 $ 2,489,000 $ 1,814,000 $ 5,186,000 $ 2,074,000 $ 2,233,000 $ 904,000 $ 185,000 $ 14,493,000 $ 5,396,000 $ 2,859,000
Reversal of incentive compensation accruals based on revised payout estimates 1,700,000       $ 2,300,000 $ 450,000          
Gain on bulk loan sale   1,100,000                  
Allowance for loans and loan portfolio   71,000,000                  
FHLB advance prepayment penalty   846,000                  
FHLB advances payoff   $ 50,000,000                  
RPG | TRS division                      
Consolidated quarterly financial data                      
Provision for loan and lease losses       $ 4,700,000              
RPG | RCS division                      
Consolidated quarterly financial data                      
Provision for loan and lease losses $ 3,300,000