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SECURITIES (Details 2) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Available for sale:    
Less than 12 months, Fair Value $ 622,208 $ 671,551
Less than 12 months, Unrealized losses (10,408) (12,400)
Greater than 12 months, Fair Value 78,300 57,415
Greater than 12 months, Unrealized losses (3,573) (2,825)
Held to maturity:    
Less than 12 months, Fair Value 102,596 101,846
Less than 12 months, Unrealized losses (1,434) (1,530)
Greater than 12 months, Fair Value 18,094 13,540
Greater than 12 months, Unrealized losses (678) (521)
U.S. GSE securities    
Available for sale:    
Less than 12 months, Fair Value 63,833 63,649
Less than 12 months, Unrealized losses (1,160) (1,344)
Greater than 12 months, Fair Value
Greater than 12 months, Unrealized losses
State and municipal obligations    
Available for sale:    
Less than 12 months, Fair Value 67,719 78,883
Less than 12 months, Unrealized losses (945) (1,338)
Greater than 12 months, Fair Value 751 240
Greater than 12 months, Unrealized losses (15) (1)
Held to maturity:    
Less than 12 months, Fair Value 20,480 21,867
Less than 12 months, Unrealized losses (87) (130)
Greater than 12 months, Fair Value
Greater than 12 months, Unrealized losses
U.S. GSE residential mortgage-backed securities    
Available for sale:    
Less than 12 months, Fair Value 153,469 140,514
Less than 12 months, Unrealized losses (2,352) (2,409)
Greater than 12 months, Fair Value 238 241
Greater than 12 months, Unrealized losses (6) (5)
Held to maturity:    
Less than 12 months, Fair Value 12,688 13,156
Less than 12 months, Unrealized losses (285) (287)
Greater than 12 months, Fair Value
Greater than 12 months, Unrealized losses
U.S. GSE residential collateralized mortgage obligations    
Available for sale:    
Less than 12 months, Fair Value 284,303 319,197
Less than 12 months, Unrealized losses (4,556) (5,221)
Greater than 12 months, Fair Value 23,390 15,627
Greater than 12 months, Unrealized losses (644) (515)
Held to maturity:    
Less than 12 months, Fair Value 39,134 31,297
Less than 12 months, Unrealized losses (500) (455)
Greater than 12 months, Fair Value 3,733 3,873
Greater than 12 months, Unrealized losses (86) (97)
U.S. GSE commercial mortgage-backed securities    
Available for sale:    
Less than 12 months, Fair Value 2,556 2,573
Less than 12 months, Unrealized losses (37) (36)
Greater than 12 months, Fair Value  
Greater than 12 months, Unrealized losses  
Held to maturity:    
Less than 12 months, Fair Value 12,847 12,860
Less than 12 months, Unrealized losses (255) (286)
Greater than 12 months, Fair Value 5,782 5,877
Greater than 12 months, Unrealized losses (240) (223)
U.S. GSE commercial collateralized mortgage obligations    
Available for sale:    
Less than 12 months, Fair Value 41,896 48,901
Less than 12 months, Unrealized losses (790) (886)
Greater than 12 months, Fair Value 9,341 6,292
Greater than 12 months, Unrealized losses (238) (70)
Held to maturity:    
Less than 12 months, Fair Value 17,447 22,666
Less than 12 months, Unrealized losses (307) (372)
Greater than 12 months, Fair Value 8,579 3,790
Greater than 12 months, Unrealized losses (352) (201)
Other asset backed securities    
Available for sale:    
Less than 12 months, Fair Value
Less than 12 months, Unrealized losses
Greater than 12 months, Fair Value 22,795 22,552
Greater than 12 months, Unrealized losses (1,455) (1,697)
Corporate bonds    
Available for sale:    
Less than 12 months, Fair Value 8,432 17,834
Less than 12 months, Unrealized losses (568) (1,166)
Greater than 12 months, Fair Value 21,785 12,463
Greater than 12 months, Unrealized losses (1,215) (537)
Held to maturity:    
Less than 12 months, Fair Value
Less than 12 months, Unrealized losses
Greater than 12 months, Fair Value
Greater than 12 months, Unrealized losses