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SECURITIES (Details 1) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Available for sale:    
Less than 12 months, Fair Value $ 236,848 $ 671,551
Less than 12 months, Unrealized losses (2,666) (12,400)
Greater than 12 months, Fair Value 481,253 57,415
Greater than 12 months, Unrealized losses (13,627) (2,825)
Held to maturity:    
Less than 12 months, Fair Value 49,527 101,846
Less than 12 months, Unrealized losses (404) (1,530)
Greater than 12 months, Fair Value 60,518 13,540
Greater than 12 months, Unrealized losses (1,870) (521)
U.S. GSE securities    
Available for sale:    
Less than 12 months, Fair Value 0 63,649
Less than 12 months, Unrealized losses 0 (1,344)
Greater than 12 months, Fair Value 56,815 0
Greater than 12 months, Unrealized losses (1,180) 0
State and municipal obligations    
Available for sale:    
Less than 12 months, Fair Value 35,350 78,883
Less than 12 months, Unrealized losses (301) (1,338)
Greater than 12 months, Fair Value 28,165 240
Greater than 12 months, Unrealized losses (518) (1)
Held to maturity:    
Less than 12 months, Fair Value 7,709 21,867
Less than 12 months, Unrealized losses (57) (130)
Greater than 12 months, Fair Value 1,009 0
Greater than 12 months, Unrealized losses (7) 0
U.S. GSE residential mortgage-backed securities    
Available for sale:    
Less than 12 months, Fair Value 107,408 140,514
Less than 12 months, Unrealized losses (1,153) (2,409)
Greater than 12 months, Fair Value 69,571 241
Greater than 12 months, Unrealized losses (1,680) (5)
Held to maturity:    
Less than 12 months, Fair Value 1,359 13,156
Less than 12 months, Unrealized losses (16) (287)
Greater than 12 months, Fair Value 9,804 0
Greater than 12 months, Unrealized losses (245) 0
U.S. GSE residential collateralized mortgage Obligations    
Available for sale:    
Less than 12 months, Fair Value 77,705 319,197
Less than 12 months, Unrealized losses (759) (5,221)
Greater than 12 months, Fair Value 224,932 15,627
Greater than 12 months, Unrealized losses (6,257) (515)
Held to maturity:    
Less than 12 months, Fair Value 21,329 31,297
Less than 12 months, Unrealized losses (94) (455)
Greater than 12 months, Fair Value 21,112 3,873
Greater than 12 months, Unrealized losses (572) (97)
U.S. GSE commercial mortgage-backed securities    
Available for sale:    
Less than 12 months, Fair Value 2,345 2,573
Less than 12 months, Unrealized losses (40) (36)
Greater than 12 months, Fair Value 0 0
Greater than 12 months, Unrealized losses 0 0
Held to maturity:    
Less than 12 months, Fair Value 8,789 12,860
Less than 12 months, Unrealized losses (121) (286)
Greater than 12 months, Fair Value 8,303 5,877
Greater than 12 months, Unrealized losses (317) (223)
U.S. GSE commercial collateralized mortgage Obligations    
Available for sale:    
Less than 12 months, Fair Value 452 48,901
Less than 12 months, Unrealized losses (1) (886)
Greater than 12 months, Fair Value 48,264 6,292
Greater than 12 months, Unrealized losses (1,248) (70)
Held to maturity:    
Less than 12 months, Fair Value 10,341 22,666
Less than 12 months, Unrealized losses (116) (372)
Greater than 12 months, Fair Value 20,290 3,790
Greater than 12 months, Unrealized losses (729) (201)
Other asset backed securities    
Available for sale:    
Less than 12 months, Fair Value 0 0
Less than 12 months, Unrealized losses 0 0
Greater than 12 months, Fair Value 23,401 22,552
Greater than 12 months, Unrealized losses (849) (1,697)
Corporate bonds    
Available for sale:    
Less than 12 months, Fair Value 13,588 17,834
Less than 12 months, Unrealized losses (412) (1,166)
Greater than 12 months, Fair Value 30,105 12,463
Greater than 12 months, Unrealized losses $ (1,895) $ (537)