Annual report pursuant to Section 13 and 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
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Schedule of gross unrealized losses and fair value of investments    
Less than 12 months, Fair value $ 331,384 $ 124,731
Less than 12 months, Unrealized Losses (3,263) (724)
More than 12 Months, Fair value 46,168 96,404
More than 12 Months, Unrealized Losses (1,382) (1,134)
Fair value, Total 377,552 221,135
Unrealized Losses, Total (4,645) (1,858)
US Government Agencies Debt Securities [Member]    
Schedule of gross unrealized losses and fair value of investments    
Less than 12 months, Fair value   7,055
Less than 12 months, Unrealized Losses   (25)
Fair value, Total   7,055
Unrealized Losses, Total   (25)
Obligations of States and Political Subdivisions [Member]    
Schedule of gross unrealized losses and fair value of investments    
Less than 12 months, Fair value 8,114 13,602
Less than 12 months, Unrealized Losses (70) (93)
More than 12 Months, Fair value 4,950 42,514
More than 12 Months, Unrealized Losses (70) (628)
Fair value, Total 13,064 56,116
Unrealized Losses, Total (140) (721)
Mortgage Backed Securities [Member]    
Schedule of gross unrealized losses and fair value of investments    
Less than 12 months, Fair value 287,113 60,151
Less than 12 months, Unrealized Losses (2,442) (362)
More than 12 Months, Fair value 21,660 49,581
More than 12 Months, Unrealized Losses (337) (436)
Fair value, Total 308,773 109,732
Unrealized Losses, Total (2,779) (798)
Corporate Bonds and Other Securities [Member]    
Schedule of gross unrealized losses and fair value of investments    
Less than 12 months, Fair value 36,157 43,923
Less than 12 months, Unrealized Losses (751) (244)
More than 12 Months, Fair value 19,558 4,309
More than 12 Months, Unrealized Losses (975) (70)
Fair value, Total 55,715 48,232
Unrealized Losses, Total $ (1,726) $ (314)