Parent Company Financial Statements, Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Assets [Abstract]
Cash on deposit	$ 46,558	$ 54,250
Goodwill	65,490	65,490
Premises and equipment, net	40,479	42,001
Other assets	30,970	35,887
Total assets	5,418,257	5,139,141
Liabilities and shareholders' equity [Abstract]
Long-term debt	57,841	57,841
Other liabilities	31,392	33,694
Total liabilities	4,720,055	4,484,276
Shareholders' equity	698,202	654,865	$ 614,886	$ 564,150
Total liabilities and shareholders' equity	5,418,257	5,139,141
Parent Company [Member]
Assets [Abstract]
Cash on deposit	3,263	1,505
Investment in and advances to subsidiaries	749,002	707,943
Goodwill	4,973	4,973
Premises and equipment, net	114	96
Deferred tax asset	890	4,649
Other assets	5,427	45
Total assets	763,669	719,211
Liabilities and shareholders' equity [Abstract]
Long-term debt	61,341	61,341
Other liabilities	4,126	3,005
Total liabilities	65,467	64,346
Shareholders' equity	698,202	654,865
Total liabilities and shareholders' equity	$ 763,669	$ 719,211