Quarterly report pursuant to Section 13 or 15(d)

SECURITIES (Schedule of Gross Unrealized Losses and Fair Value of Investments) (Details)

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SECURITIES (Schedule of Gross Unrealized Losses and Fair Value of Investments) (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Less than 12 months, Fair Value $ 54,438 $ 331,384
Less than 12 months, Unrealized Losses (381) (3,263)
More than 12 Months, Fair Value 85,085 46,168
More than 12 months, Unrealized Losses (1,922) (1,382)
Total, Fair Value 139,523 377,552
Total, Unrealized Losses (2,303) (4,645)
Obligations of States and Political Subdivisions    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Less than 12 months, Fair Value 11,640 8,114
Less than 12 months, Unrealized Losses (209) (70)
More than 12 Months, Fair Value 655 4,950
More than 12 months, Unrealized Losses (6) (70)
Total, Fair Value 12,295 13,064
Total, Unrealized Losses (215) (140)
Mortgage-Backed Securities    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Less than 12 months, Fair Value 37,739 287,113
Less than 12 months, Unrealized Losses (156) (2,442)
More than 12 Months, Fair Value 43,430 21,660
More than 12 months, Unrealized Losses (353) (337)
Total, Fair Value 81,169 308,773
Total, Unrealized Losses (509) (2,779)
Corporate Bonds and Other Securities    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Less than 12 months, Fair Value 5,059 36,157
Less than 12 months, Unrealized Losses (16) (751)
More than 12 Months, Fair Value 41,000 19,558
More than 12 months, Unrealized Losses (1,563) (975)
Total, Fair Value 46,059 55,715
Total, Unrealized Losses $ (1,579) $ (1,726)