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Parent Only Financial Information Parent Only Statement of Cash Flows (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Cash Flows from Operating Activities: |  |  |
Net Income | $ 40,827 | $ 37,475 | $ 36,279
Shares Issued Under the Directors’ Stock Plan | 125 | 258 | 205
Net Cash Provided By Operating Activities | 42,314 | 43,944 | 41,976
Cash Flows from Financing Activities: |  |  |
Shares Issued for Stock Option Exercises, net | 748 | 1,792 | 2,255
Shares Issued Under the Employee Stock Purchase Plan | 513 | 493 | 505
Shares Issued for Dividend Reinvestment Plans | 1,808 | 1,777 | 1,761
Purchase of Treasury Stock | (1,578) | (2,469) | (2,098)
Cash Dividends Paid | (15,740) | (15,206) | (14,389)
Net Cash Provided By Financing Activities | 455,773 | 134,269 | 197,195
Net Increase (Decrease) in Cash and Cash Equivalents | 310,770 | (14,018) | 11,401
Cash and Cash Equivalents at Beginning of Year | 70,221 | 84,239 | 72,838
Cash and Cash Equivalents at End of Year | 380,991 | 70,221 | 84,239
Interest on Deposits and Borrowings | 13,799 | 20,843 | 12,212
Parent Company |  |  |
Cash Flows from Operating Activities: |  |  |
Net Income | 40,827 | 37,475 | 36,279
Undistributed Net Income of Subsidiaries | (24,526) | (23,753) | (23,489)
Shares Issued Under the Directors’ Stock Plan | 125 | 258 | 205
Changes in Other Assets and Other Liabilities | (3,606) | (1,236) | (918)
Net Cash Provided By Operating Activities | 12,820 | 12,744 | 12,077
Cash Flows from Financing Activities: |  |  |
Shares Issued for Stock Option Exercises, net | 748 | 1,792 | 2,255
Shares Issued Under the Employee Stock Purchase Plan | 513 | 493 | 505
Shares Issued for Dividend Reinvestment Plans | 1,808 | 1,777 | 1,761
Purchase of Treasury Stock | (1,578) | (2,469) | (2,097)
Cash Dividends Paid | (15,740) | (15,206) | (14,389)
Net Cash Provided By Financing Activities | (14,249) | (13,613) | (11,965)
Net Increase (Decrease) in Cash and Cash Equivalents | (1,429) | (869) | 112
Cash and Cash Equivalents at Beginning of Year | 1,429 | 2,298 | 2,186
Cash and Cash Equivalents at End of Year | 0 | 1,429 | 2,298
Interest on Deposits and Borrowings | $ 746 | $ 1,024 | $ 976

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