Quarterly report pursuant to Section 13 or 15(d)

INTANGIBLE ASSETS (Narrative) (Details)

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INTANGIBLE ASSETS (Narrative) (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Jun. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Finite-Lived Intangible Assets [Line Items]          
Impairment charges   $ 0      
Intangible assets, amortization expense $ 1,480,000   $ 1,843,000 $ 4,661,000 $ 5,468,000
Minimum | ODCM          
Finite-Lived Intangible Assets [Line Items]          
Intangible assets, amortization period       5 years  
Maximum | ODCM          
Finite-Lived Intangible Assets [Line Items]          
Intangible assets, amortization period       10 years  
Amortizable core deposit intangibles          
Finite-Lived Intangible Assets [Line Items]          
Intangible assets, amortization expense 1,400,000   1,700,000 $ 4,300,000 5,300,000
Amortizable core deposit intangibles | Minimum          
Finite-Lived Intangible Assets [Line Items]          
Intangible assets, amortization period       4 years  
Amortizable core deposit intangibles | Maximum          
Finite-Lived Intangible Assets [Line Items]          
Intangible assets, amortization period       14 years  
Other amortizable intangibles          
Finite-Lived Intangible Assets [Line Items]          
Intangible assets, amortization expense $ 120,000   $ 160,000 $ 360,000 $ 160,000