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
Jun. 30, 2018
Dec. 31, 2017
Amortized Cost    
Due in one year or less $ 35,062 $ 25,179
Due after one year through five years 212,313 145,276
Due after five years through ten years 268,175 223,210
Due after ten years 1,056,185 577,674
Total AFS securities 1,571,735 971,339
Estimated Fair Value    
Due in one year or less 35,155 25,326
Due after one year through five years 208,987 145,980
Due after five years through ten years 268,547 226,251
Due after ten years 1,045,359 576,665
Total AFS securities 1,558,048 974,222
Carrying Value    
Due in one year or less 0 3,221
Due after one year through five years 3,943 44,289
Due after five years through ten years 3,519 79,114
Due after ten years 40,142 73,015
Total HTM securities 47,604 199,639
Estimated Fair Value    
Due in one year or less 0 3,230
Due after one year through five years 3,938 44,601
Due after five years through ten years 3,520 80,532
Due after ten years 40,191 75,120
Total HTM securities $ 47,649 $ 203,483