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Parent Company Financial Statements (Condensed Statements of Cash Flows) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES |  |  |  |  |  |  |  |  |  |  |
Net Income | $ 10,980 | $ 12,639 | $ 11,097 | $ 11,813 | $ 11,621 | $ 9,660 | $ 9,839 | $ 9,556 | $ 46,529 | $ 40,676 | $ 35,184
Adjustments to Reconcile Net Income to Net Cash from Operations |  |  |  |  |  |  |  |  |  |  |
Interest Receivable and Other Assets |  |  |  |  |  |  |  |  | 2,211 | (4,528) | 5,813
Change in Other Liabilities |  |  |  |  |  |  |  |  | (162) | (110) | (2,547)
Equity Based Compensation |  |  |  |  |  |  |  |  | 1,355 | 1,246 | 1,407
Excess Tax Benefit from Restricted Share Grant |  |  |  |  |  |  |  |  | 32 | 240 | 200
Net Cash from Operating Activities |  |  |  |  |  |  |  |  | 62,331 | 54,875 | 41,913
CASH FLOWS FROM INVESTING ACTIVITIES |  |  |  |  |  |  |  |  |  |  |
Cash Used for Business Acquisitions |  |  |  |  |  |  |  |  | 0 | 0 | (1,016)
Net Cash from Investing Activities |  |  |  |  |  |  |  |  | (38,798) | (189,280) | (71,689)
CASH FLOWS FROM FINANCING ACTIVITIES |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Long-term Debt |  |  |  |  |  |  |  |  | 25,000 | 75,000 | 0
Issuance (Retirement) of Common Stock |  |  |  |  |  |  |  |  |  | (29) | 55
Dividends Paid |  |  |  |  |  |  |  |  | (14,074) | (11,842) | (10,630)
Net Cash from Financing Activities |  |  |  |  |  |  |  |  | 2,658 | 139,948 | 42,583
Net Change in Cash and Cash Equivalents |  |  |  |  |  |  |  |  | 26,191 | 5,543 | 12,807
Cash and Cash Equivalents at Beginning of Year |  |  |  | 70,359 |  |  |  | 64,816 | 70,359 | 64,816 | 52,009
Cash and Cash Equivalents at End of Year | 96,550 |  |  |  | 70,359 |  |  |  | 96,550 | 70,359 | 64,816
Parent Company |  |  |  |  |  |  |  |  |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES |  |  |  |  |  |  |  |  |  |  |
Net Income |  |  |  |  |  |  |  |  | 46,529 | 40,676 | 35,184
Adjustments to Reconcile Net Income to Net Cash from Operations |  |  |  |  |  |  |  |  |  |  |
Interest Receivable and Other Assets |  |  |  |  |  |  |  |  | 1,588 | 431 | 2,085
Change in Other Liabilities |  |  |  |  |  |  |  |  | (163) | (122) | 310
Equity Based Compensation |  |  |  |  |  |  |  |  | 1,355 | 1,246 | 1,407
Excess Tax Benefit from Restricted Share Grant |  |  |  |  |  |  |  |  | 32 | 240 | 200
Equity in Excess Undistributed Income of Subsidiaries |  |  |  |  |  |  |  |  | (42,016) | (16,040) | (21,514)
Net Cash from Operating Activities |  |  |  |  |  |  |  |  | 7,325 | 26,431 | 17,672
CASH FLOWS FROM INVESTING ACTIVITIES |  |  |  |  |  |  |  |  |  |  |
Cash Used for Business Acquisitions |  |  |  |  |  |  |  |  | (25,160) | 0 | (15,992)
Net Cash from Investing Activities |  |  |  |  |  |  |  |  | (25,160) | 0 | (15,992)
CASH FLOWS FROM FINANCING ACTIVITIES |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Long-term Debt |  |  |  |  |  |  |  |  | 25,000 | 0 | 0
Issuance (Retirement) of Common Stock |  |  |  |  |  |  |  |  | 0 | (29) | 55
Dividends Paid |  |  |  |  |  |  |  |  | (14,074) | (11,842) | (10,630)
Net Cash from Financing Activities |  |  |  |  |  |  |  |  | 10,926 | (11,871) | (10,575)
Net Change in Cash and Cash Equivalents |  |  |  |  |  |  |  |  | (6,909) | 14,560 | (8,895)
Cash and Cash Equivalents at Beginning of Year |  |  |  | $ 24,777 |  |  |  | $ 10,217 | 24,777 | 10,217 | 19,112
Cash and Cash Equivalents at End of Year | $ 17,868 |  |  |  | $ 24,777 |  |  |  | $ 17,868 | $ 24,777 | $ 10,217

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