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Parent Company Financial Statements (Condensed Statements of Cash Flows) (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 25, 2019 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES |  |  |  |  |  |  |  |  |  |  |  |
Net Income |  | $ 20,890 | $ 14,593 | $ 14,255 | $ 12,472 | $ 15,820 | $ 13,064 | $ 15,271 | $ 15,067 | $ 62,210 | $ 59,222 | $ 46,529
Adjustments to Reconcile Net Income to Net Cash from Operating Activities: |  |  |  |  |  |  |  |  |  |  |  |
Interest Receivable and Other Assets |  |  |  |  |  |  |  |  |  | (2,925) | (1,602) | 2,211
Change in Other Liabilities |  |  |  |  |  |  |  |  |  | 4,433 | 4,488 | (162)
Equity Based Compensation |  |  |  |  |  |  |  |  |  | 1,051 | 1,287 | 1,355
Excess Tax Benefit from Restricted Share Grant |  |  |  |  |  |  |  |  |  | 3 | 25 | 32
Net Cash from Operating Activities |  |  |  |  |  |  |  |  |  | 92,418 | 65,229 | 62,331
CASH FLOWS FROM INVESTING ACTIVITIES |  |  |  |  |  |  |  |  |  |  |  |
Net Cash from Investing Activities |  |  |  |  |  |  |  |  |  | (346,078) | 30,662 | (38,798)
CASH FLOWS FROM FINANCING ACTIVITIES |  |  |  |  |  |  |  |  |  |  |  |
Advances in Long-term Debt |  |  |  |  |  |  |  |  |  | 0 | 89,214 | 25,000
Repayments of Long-term Debt |  |  |  |  |  |  |  |  |  | (40,625) | (65,171) | (40,155)
Issuance (Retirement) of Common Stock |  |  |  |  |  |  |  |  |  | (5,789) | 0 | 0
Dividends Paid |  |  |  |  |  |  |  |  |  | (20,136) | (17,556) | (14,074)
Net Cash from Financing Activities |  |  |  |  |  |  |  |  |  | 495,524 | (88,557) | 2,658
Net Change in Cash and Cash Equivalents |  |  |  |  |  |  |  |  |  | 241,864 | 7,334 | 26,191
Cash and Cash Equivalents at Beginning of Year |  |  |  |  | 103,884 |  |  |  | 96,550 | 103,884 | 96,550 | 70,359
Cash and Cash Equivalents at End of Year |  | 345,748 |  |  |  | 103,884 |  |  |  | 345,748 | 103,884 | 96,550
Parent Company |  |  |  |  |  |  |  |  |  |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES |  |  |  |  |  |  |  |  |  |  |  |
Net Income |  |  |  |  |  |  |  |  |  | 62,210 | 59,222 | 46,529
Adjustments to Reconcile Net Income to Net Cash from Operating Activities: |  |  |  |  |  |  |  |  |  |  |  |
Interest Receivable and Other Assets |  |  |  |  |  |  |  |  |  | (8,575) | 31 | 1,588
Change in Other Liabilities |  |  |  |  |  |  |  |  |  | (142) | (406) | (163)
Equity Based Compensation |  |  |  |  |  |  |  |  |  | 1,051 | 1,287 | 1,355
Excess Tax Benefit from Restricted Share Grant |  |  |  |  |  |  |  |  |  | 3 | 25 | 32
Equity in Excess Undistributed Income of Subsidiaries |  |  |  |  |  |  |  |  |  | (23,827) | (16,988) | (42,016)
Net Cash from Operating Activities |  |  |  |  |  |  |  |  |  | 30,720 | 43,171 | 7,325
CASH FLOWS FROM INVESTING ACTIVITIES |  |  |  |  |  |  |  |  |  |  |  |
Cash Used for Business Acquisitions |  |  |  |  |  |  |  |  |  | 0 | (14,958) | (25,160)
Net Cash from Investing Activities |  |  |  |  |  |  |  |  |  | 0 | (14,958) | (25,160)
CASH FLOWS FROM FINANCING ACTIVITIES |  |  |  |  |  |  |  |  |  |  |  |
Advances in Long-term Debt |  |  |  |  |  |  |  |  |  | 0 | 39,213 | 25,000
Repayments of Long-term Debt | $ (25,000) |  |  |  |  |  |  |  |  | 0 | (25,000) | 0
Issuance (Retirement) of Common Stock |  |  |  |  |  |  |  |  |  | (5,789) | 0 | 0
Dividends Paid |  |  |  |  |  |  |  |  |  | (20,136) | (17,556) | (14,074)
Net Cash from Financing Activities |  |  |  |  |  |  |  |  |  | (25,925) | (3,343) | 10,926
Net Change in Cash and Cash Equivalents |  |  |  |  |  |  |  |  |  | 4,795 | 24,870 | (6,909)
Cash and Cash Equivalents at Beginning of Year |  |  |  |  | $ 42,738 |  |  |  | $ 17,868 | 42,738 | 17,868 | 24,777
Cash and Cash Equivalents at End of Year |  | $ 47,533 |  |  |  | $ 42,738 |  |  |  | $ 47,533 | $ 42,738 | $ 17,868

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