PARENT COMPANY - Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Assets [Abstract]
Cash and due from banks	$ 27,689	$ 46,814
Deferred tax assets, net	9,973	10,700
Other assets	19,394	26,528
Total assets	4,486,001	3,949,217
Liabilities [Abstract]
Other liabilities	28,450	34,525
Total liabilities	3,923,876	3,402,766
Stockholders' Equity Attributable to Parent [Abstract]
Common stock	253	255
Additional paid-in capital	335,846	339,334
Retained earnings	237,165	214,456
Treasury stock	(14,196)	(14,369)
Accumulated other comprehensive income	3,057	6,775
Total shareholders' equity	562,125	546,451	$ 535,721	$ 487,625
Total liabilities and shareholders' equity	4,486,001	3,949,217
Parent Company [Member]
Assets [Abstract]
Cash and due from banks	28,795	35,645
Investment in subsidiary	534,790	513,012
Deferred tax assets, net	217	130
Other assets	2,298	548
Total assets	566,100	549,335
Liabilities [Abstract]
Other liabilities	3,975	2,884
Total liabilities	3,975	2,884
Stockholders' Equity Attributable to Parent [Abstract]
Common stock	253	255
Additional paid-in capital	335,846	339,334
Retained earnings	237,165	214,456
Treasury stock	(14,196)	(14,369)
Accumulated other comprehensive income	3,057	6,775
Total shareholders' equity	562,125	546,451
Total liabilities and shareholders' equity	$ 566,100	$ 549,335