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Parent Company Only Financial Statements - Parent Company Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Sep. 25, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Operating Activities |  |  |  |
Net income |  | $ 44,675 | $ 29,540 | $ 25,866
Adjustments to reconcile net income to net cash provided by operating activities |  |  |  |
Depreciation and amortization |  | 8,950 | 8,768 | 8,729
Stock-based compensation cost |  | 1,927 | 1,750 | 1,847
Net cash provided (used) by operating activities |  | (22,262) | 19,248 | 53,553
Investing Activities |  |  |  |
Acquisitions, net cash acquired |  | 9,279 |  |
Net cash provided by investing activities |  | (538,380) | (65,594) | (154,708)
Financing Activities |  |  |  |
Repurchase of common stock |  | (482) | (1,948) | (356)
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 |  | 589,598 | 149,701 | 19,808
Net change in cash and cash equivalents |  | 28,956 | 103,355 | (81,347)
Cash and cash equivalents at beginning of period |  | 144,006 | 40,651 | 121,998
Cash and cash equivalents at end of period |  | 172,962 | 144,006 | 40,651
Parent Company |  |  |  |
Operating Activities |  |  |  |
Net income |  | 44,675 | 29,540 | 25,866
Adjustments to reconcile net income to net cash provided by operating activities |  |  |  |
Equity in undistributed income of subsidiaries |  | (33,208) | (19,089) | (18,852)
Depreciation and amortization |  | 116 | 115 | 116
Stock-based compensation cost |  | 1,927 | 251 | 370
Other, net |  | 414 | 2,676 | 1,314
Net cash provided (used) by operating activities |  | 13,924 | 13,493 | 8,814
Financing Activities |  |  |  |
Cash dividends paid on common stock |  | (10,387) | (8,909) | (7,456)
Repurchase of common stock |  | (483) | (1,948) | (356)
Proceeds from the issuance of common stock in initial public offering net of issuance costs |  |  | 62,804 |
Net cash provided (used) by financing activities |  | (10,870) | 51,947 | (7,812)
Net change in cash and cash equivalents |  | 3,054 | 65,440 | 1,002
Cash and cash equivalents at beginning of period |  | 73,647 | 8,207 | 7,205
Cash and cash equivalents at end of period |  | $ 76,701 | $ 73,647 | $ 8,207

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