Quarterly report pursuant to Section 13 or 15(d)

SECURITIES (Schedule of Amortized Cost and Estimated Fair Value of Securities) (Details)

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SECURITIES (Schedule of Amortized Cost and Estimated Fair Value of Securities) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2016
Jun. 30, 2015
Dec. 31, 2015
Available-for-sale Securities      
Due in one year or less, Amortized Cost $ 9,703   $ 8,380
Due in one year or less, Estimated Fair Value 9,792   8,370
Due after one year through five years, Amortized Cost 94,153   65,326
Due after one year through five years, Estimated Fair Value 96,641   66,996
Due after five years through ten years, Amortized Cost 316,897   296,864
Due after five years through ten years, Estimated Fair Value 323,902   301,920
Due after ten years, Amortized Cost 502,117   520,706
Due after ten years, Estimated Fair Value 509,074   526,006
Total securities available for sale, Amortized Cost 922,870   891,276
Total securities available for sale, Estimated Fair Value 939,409   903,292
Held to maturity Securities      
Due in one year or less, Carrying Value [1] 1,477   1,488
Due in one year or less, Estimated Fair Value 1,479   1,491
Due after one year through five years, Carrying Value [1] 7,907   4,294
Due after one year through five years, Estimated Fair Value 8,046   4,348
Due after five years through ten years, Carrying Value [1] 49,884   44,736
Due after five years through ten years, Estimated Fair Value 51,178   45,501
Due after ten years, Carrying Value [1] 145,176   154,856
Due after ten years, Estimated Fair Value 149,646   158,097
Held-to-maturity Securities, Total [1] 204,444   205,374
Total securities held to maturity, Estimated Fair Value 210,349   $ 209,437
Held to maturity securities unrealized gains before tax $ 6,400 $ 8,100  
[1] The carrying value includes $6.4 million of net unrealized gains present at the time of transfer from available for securities, net of any accretion.