Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Statement Of Cash Flows [Abstract]
Net cash from operating activities	$ 34,295	$ 25,301
Cash flows used for investing activities:
Maturities, paydowns and calls of securities, available-for-sale	43,277	38,869
Purchases of securities, available-for-sale	(184,119)	(39,144)
Proceeds from sale of securities available for sale	1,785	1,455
Purchase of other securities		(257)
Redemption of other securities	3,526
Sale of equity securities		247
Net loan repayments (originations)	54,926	(339,683)
Proceeds from sale of other real estate owned properties	118
Proceeds from sale of premises and equipment	13	12
Premises and equipment purchases	(1,689)	(1,780)
Net cash used for investing activities	(83,948)	(340,281)
Cash flows from financing activities:
Repayment of long-term FHLB advances	(50,000)
Net change in short-term FHLB advances		(101,500)
Proceeds from other borrowings		183,695
Increase in deposits	245,368	390,005
Increase (decrease) in securities sold under repurchase agreements	(5,583)	7,139
Purchase of treasury shares	(20,557)	(12,756)
Common dividends paid	(5,932)	(5,365)
Net cash provided by financing activities	163,296	461,218
Increase in cash and cash equivalents	113,643	146,238
Cash and cash equivalents at beginning of period	139,522	48,535
Cash and cash equivalents at end of period	253,165	194,773
Cash paid during the period for:
Interest	4,995	7,733
Income taxes	4,690	4,595
Supplemental cash flow information:
Transfer of loans from portfolio to other real estate owned	26
Transfer of premises to held-for-sale	73
Change in fair value of swap asset	8,906	(15,809)
Change in fair value of swap liability	(8,906)	$ 15,809
Securities purchased not settled	$ 3,857