Parent Company Only Financial Statements - Condensed Statements of Cash Flows (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Condensed Financial Statements, Captions [Line Items]
Net income	$ 72,952,000	$ 51,490,000	$ 45,270,000
Depreciation, amortization and accretion, net	15,060,000	14,449,000	11,721,000
Increase in other assets	(19,537,000)	(13,719,000)	(2,045,000)
Increase in other liabilities	3,318,000	5,463,000	5,713,000
Net cash provided by operating activities	65,824,000	69,596,000	63,541,000
Net cash from business acquisition	67,323,000	27,061,000	0
Net cash used in investing activities	(178,688,000)	(482,499,000)	(562,422,000)
Repayment of short-term debt	0	0	(5,000,000)
Proceeds from short-term debt	0	0	5,000,000
Proceeds from issuance of common stock	1,244,000	1,937,000	610,000
Payment to repurchase common stock	(340,000)	(326,000)	(213,000)
Direct expenses related to capital transactions	(29,000)	(206,000)	0
Dividends paid on common stock	(17,830,000)	(14,721,000)	(12,814,000)
Net cash provided by financing activities	96,695,000	164,224,000	831,082,000
Increase (decrease) in cash and cash equivalents	(16,169,000)	(248,679,000)	332,201,000
Cash and cash equivalents at beginning of period	168,602,000	417,281,000	85,080,000
Cash and cash equivalents at end of period	152,433,000	168,602,000	417,281,000
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net income	72,952,000	51,490,000	45,270,000
Depreciation, amortization and accretion, net	218,000	350,000	104,000
Dividends received from subsidiary	34,040,000	28,075,000	29,663,000
Equity in undistributed earnings of subsidiaries	(44,811,000)	(30,380,000)	(19,030,000)
Increase in other assets	(208,359,000)	(206,880,000)	(30,121,000)
Increase in other liabilities	(146,000)	1,760,000	1,349,000
Net cash provided by operating activities	(146,106,000)	(155,585,000)	27,235,000
Investment in subsidiary	0	0	(700,000)
Net cash from business acquisition	67,323,000	30,968,000	0
Net cash used in investing activities	67,323,000	30,968,000	(700,000)
Repayment of short-term debt	0	0	(5,000,000)
Proceeds from short-term debt	0	0	5,000,000
Issuance of subordinated debt	0	0	94,253,000
Proceeds from issuance of common stock	93,415,000	46,128,000	610,000
Payment to repurchase common stock	(340,000)	(326,000)	(213,000)
Direct expenses related to capital transactions	(29,000)	(206,000)	0
Dividends paid on common stock	(17,830,000)	(14,721,000)	(12,814,000)
Net cash provided by financing activities	75,216,000	30,875,000	81,836,000
Increase (decrease) in cash and cash equivalents	(3,567,000)	(93,742,000)	108,371,000
Cash and cash equivalents at beginning of period	28,421,000	122,163,000	13,792,000
Cash and cash equivalents at end of period	$ 24,854,000	$ 28,421,000	$ 122,163,000