SECURITIES - Amortized Cost And Fair Value Of Debt Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Available-for-Sale, Amortized Cost
Due less than one year	$ 45,101
Due after one year through five years	143,216
Due after five years through ten years	308,271
Due greater than ten years	237,324
Mortgage-backed securities: residential	336,122
Mortgage-backed securities: commercial	185,161
Total	1,255,195	$ 987,622
Available-for-Sale, Fair Value
Due less than one year	45,446
Due after one year through five years	147,901
Due after five years through ten years	313,844
Due greater than ten years	242,821
Mortgage-backed securities: residential	341,267
Mortgage-backed securities: commercial	189,482
Total	$ 1,280,761	$ 1,022,182