Parent Company Only Financial Statements - Parent Company Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands		12 Months Ended
	Sep. 25, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Activities
Net income		$ 52,681	$ 44,675	$ 29,540
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization		8,868	8,950	8,768
Stock-based compensation cost		3,095	1,927	1,750
Net cash provided (used) by operating activities		149,116	(22,262)	19,248
Investing Activities
Acquisitions, net cash acquired			9,279
Net cash provided by investing activities		(416,942)	(538,380)	(65,594)
Financing Activities
Repurchase of common stock		(712)	(482)	(1,948)
Proceeds from the issuance of common stock in initial public offering net of issuance costs	$ 62,800			62,804
Net cash provided (used) by financing activities		337,175	589,598	149,701
Net change in cash and cash equivalents		69,349	28,956	103,355
Cash and cash equivalents at beginning of period		172,962	144,006	40,651
Cash and cash equivalents at end of period		242,311	172,962	144,006
Parent Company
Operating Activities
Net income		52,681	44,675	29,540
Adjustments to reconcile net income to net cash provided by operating activities
Equity in undistributed income of subsidiaries		(40,642)	(33,208)	(19,089)
Depreciation and amortization		115	116	115
Stock-based compensation cost		3,095	1,927	251
Other, net		1,266	413	2,676
Net cash provided (used) by operating activities		16,515	13,923	13,493
Financing Activities
Cash dividends paid on common stock		(10,751)	(10,387)	(8,909)
Repurchase of common stock		(712)	(482)	(1,948)
Proceeds from the issuance of common stock in initial public offering net of issuance costs				62,804
Net cash provided (used) by financing activities		(11,463)	(10,869)	51,947
Net change in cash and cash equivalents		5,052	3,054	65,440
Cash and cash equivalents at beginning of period		76,701	73,647	8,207
Cash and cash equivalents at end of period		$ 81,753	$ 76,701	$ 73,647