Quarterly report pursuant to Section 13 or 15(d)

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Change in Accumulated Other Comprehensive Income) (Details)

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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Change in Accumulated Other Comprehensive Income) (Details) - USD ($)
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
AOCI Attributable to Parent, Net of Tax    
Beginning balance $ 1,001,032,000 $ 995,367,000
Other comprehensive income (loss) 3,606,000 59,000
Amounts reclassified from accumulated other comprehensive income (208,000) 48,000
Net current period other comprehensive income (loss) 3,398,000 107,000
Ending balance 1,015,631,000 980,978,000
Accumulated Other Comprehensive Income (Loss)    
AOCI Attributable to Parent, Net of Tax    
Beginning balance (3,809,000) 6,252,000
Net current period other comprehensive income (loss) 3,398,000 107,000
Ending balance (411,000) 6,359,000
Unrealized Gains (Losses) on AFS Securities    
AOCI Attributable to Parent, Net of Tax    
Beginning balance (542,000) 7,777,000
Other comprehensive income (loss) 3,637,000 3,032,000
Amounts reclassified from accumulated other comprehensive income (313,000) (93,000)
Net current period other comprehensive income (loss) 3,324,000 2,939,000
Ending balance 2,782,000 10,716,000
Unrealized Gain for AFS Securities Transferred to HTM    
AOCI Attributable to Parent, Net of Tax    
Beginning balance 3,377,000 4,432,000
Other comprehensive income (loss) 0 (292,000)
Amounts reclassified from accumulated other comprehensive income (184,000) 0
Net current period other comprehensive income (loss) (184,000) (292,000)
Ending balance 3,193,000 4,140,000
Change in Fair Value of Cash Flow Hedge    
AOCI Attributable to Parent, Net of Tax    
Beginning balance (5,179,000) (5,957,000)
Other comprehensive income (loss) (31,000) (2,681,000)
Amounts reclassified from accumulated other comprehensive income 180,000 141,000
Net current period other comprehensive income (loss) 149,000 (2,540,000)
Ending balance (5,030,000) (8,497,000)
Unrealized Gains (Losses) on BOLI    
AOCI Attributable to Parent, Net of Tax    
Beginning balance (1,465,000)  
Other comprehensive income (loss) 0  
Amounts reclassified from accumulated other comprehensive income 109,000 $ 0
Net current period other comprehensive income (loss) 109,000  
Ending balance $ (1,356,000)