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 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
AOCI Attributable to Parent, Net of Tax        
Beginning balance     $ 1,001,032,000 $ 995,367,000
Other comprehensive income (loss) $ (2,688,000) $ 1,043,000 5,169,000 4,085,000
Amounts reclassified from accumulated other comprehensive income (9,000) (83,000) (49,000) (478,000)
Net current period other comprehensive income (loss) (2,697,000) 960,000 5,120,000 3,607,000
Ending balance 1,041,371,000 1,000,964,000 1,041,371,000 1,000,964,000
Accumulated Other Comprehensive Income (Loss)        
AOCI Attributable to Parent, Net of Tax        
Beginning balance 4,008,000 8,899,000 (3,809,000) 6,252,000
Net current period other comprehensive income (loss)     5,120,000 3,607,000
Ending balance 1,311,000 9,859,000 1,311,000 9,859,000
Unrealized Gains (Losses) on AFS Securities        
AOCI Attributable to Parent, Net of Tax        
Beginning balance 7,733,000 14,412,000 (542,000) 7,777,000
Other comprehensive income (loss) (2,729,000) 1,121,000 5,935,000 7,851,000
Amounts reclassified from accumulated other comprehensive income (119,000) 0 (508,000) (95,000)
Net current period other comprehensive income (loss) (2,848,000) 1,121,000 5,427,000 7,756,000
Ending balance 4,885,000 15,533,000 4,885,000 15,533,000
Unrealized Gain for AFS Securities Transferred to HTM        
AOCI Attributable to Parent, Net of Tax        
Beginning balance 3,033,000 3,853,000 3,377,000 4,432,000
Other comprehensive income (loss) 0 0 0 0
Amounts reclassified from accumulated other comprehensive income (163,000) (237,000) (507,000) (816,000)
Net current period other comprehensive income (loss) (163,000) (237,000) (507,000) (816,000)
Ending balance 2,870,000 3,616,000 2,870,000 3,616,000
Change in Fair Value of Cash Flow Hedge        
AOCI Attributable to Parent, Net of Tax        
Beginning balance (5,487,000) (9,366,000) (5,179,000) (5,957,000)
Other comprehensive income (loss) 41,000 (78,000) (766,000) (3,766,000)
Amounts reclassified from accumulated other comprehensive income 189,000 154,000 688,000 433,000
Net current period other comprehensive income (loss) 230,000 76,000 (78,000) (3,333,000)
Ending balance (5,257,000) (9,290,000) (5,257,000) (9,290,000)
Unrealized Gains (Losses) on BOLI        
AOCI Attributable to Parent, Net of Tax        
Beginning balance (1,271,000)   (1,465,000)  
Other comprehensive income (loss) 0   0  
Amounts reclassified from accumulated other comprehensive income 84,000 $ 0 278,000 $ 0
Net current period other comprehensive income (loss) 84,000   278,000  
Ending balance $ (1,187,000)   $ (1,187,000)