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
Sep. 30, 2020
Dec. 31, 2019
AFS Securities [Abstract]    
Due in one year or less, Amortized Cost $ 28,581 $ 35,177
Due in one year or less, Estimated Fair Value 28,834 35,329
Due after one year through five years, Amortized Cost 140,844 164,605
Due after one year through five years, Estimated Fair Value 148,114 166,873
Due after five years through ten years, Amortized Cost 251,501 249,713
Due after five years through ten years, Estimated Fair Value 258,806 254,790
Due after ten years, Amortized Cost 1,931,990 1,443,932
Due after ten years, Estimated Fair Value 2,007,586 1,488,453
Total AFS securities 2,352,916 1,893,427
Total AFS securities, Estimated Fair Value 2,443,340 1,945,445
HTM Securities [Abstract]    
Due in one year or less, Carrying Value 1,005 502
Due in one year or less, Estimated Fair Value 1,024 504
Due after one year through five years, Carrying Value 9,076 10,258
Due after one year through five years, Estimated Fair Value 9,436 10,539
Due after five years through ten years, Carrying Value 1,749 1,768
Due after five years through ten years, Estimated Fair Value 1,796 1,800
Due after ten years, Carrying Value 534,831 542,616
Due after ten years, Estimated Fair Value 601,917 590,660
Total HTM Securities 546,661 555,144
Total HTM securities, Estimated Fair Value $ 614,173 $ 603,503