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
Jun. 30, 2019
Dec. 31, 2018
Schedule of gross unrealized losses and fair value of investments [Line Items]    
Less than 12 months, Fair Value $ 38,119 $ 475,029
Less than 12 months, Unrealized Losses (201) (5,361)
More than 12 Months, Fair Value 183,952 385,433
More than 12 months, Unrealized Losses (1,748) (10,184)
Total, Fair Value 222,071 860,462
Total, Unrealized Losses (1,949) (15,545)
Obligations of states and political subdivisions    
Schedule of gross unrealized losses and fair value of investments [Line Items]    
Less than 12 months, Fair Value 775 133,513
Less than 12 months, Unrealized Losses 0 (1,566)
More than 12 Months, Fair Value 731 10,145
More than 12 months, Unrealized Losses (11) (375)
Total, Fair Value 1,506 143,658
Total, Unrealized Losses (11) (1,941)
Corporate and other bonds    
Schedule of gross unrealized losses and fair value of investments [Line Items]    
Less than 12 months, Fair Value 10,518 35,478
Less than 12 months, Unrealized Losses (85) (315)
More than 12 Months, Fair Value 33,592 33,888
More than 12 months, Unrealized Losses (424) (668)
Total, Fair Value 44,110 69,366
Total, Unrealized Losses (509) (983)
Mortgage-backed securities    
Schedule of gross unrealized losses and fair value of investments [Line Items]    
Less than 12 months, Fair Value 26,826 306,038
Less than 12 months, Unrealized Losses (116) (3,480)
More than 12 Months, Fair Value 149,629 341,400
More than 12 months, Unrealized Losses (1,313) (9,141)
Total, Fair Value 176,455 647,438
Total, Unrealized Losses $ (1,429) $ (12,621)