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Parent Only Financial Information Parent Only Statement of Cash Flows (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Cash Flows from Operating Activities: |  |  |
Net Income | $ 26,534 | $ 24,662 | $ 23,360
Stock-Based Compensation Expense | 287 | 308 | 360
Stock-Based Compensation Expense | 287 | 308 | 360
Net Cash Provided By Operating Activities | 34,695 | 28,926 | 30,641
Cash Flows from Investing Activities: |  |  |
Proceeds from the Sale of Securities Available-for-Sale | 97,930 | 66,551 | 49,928
Purchases of Securities Available-for-Sale | (134,950) | (201,820) | (113,953)
Net Cash Used In Investing Activities | (157,789) | (229,539) | (67,693)
Cash Flows from Financing Activities: |  |  |
Shares Issued for Stock Option Exercises, net | 2,404 | 918 | 1,454
Shares Issued Under the Employee Stock Purchase Plan | 493 | 494 | 488
Shares Issued for Dividend Reinvestment Plans | 1,743 | 886 | 0
Tax Benefit for Exercises of Stock Options | 188 | 59 | 25
Purchase of Treasury Stock | (2,141) | (1,498) | (2,455)
Cash Dividends Paid | (13,092) | (12,700) | (12,407)
Net Cash Provided By Financing Activities | 129,381 | 205,386 | 33,367
Net Increase (Decrease) in Cash and Cash Equivalents | 6,287 | 4,773 | (3,685)
Cash and Cash Equivalents at Beginning of Year | 51,068 | 46,295 | 49,980
Cash and Cash Equivalents at End of Year | 57,355 | 51,068 | 46,295
Interest on Deposits and Borrowings | 5,341 | 4,856 | 5,932
Shares Issued for Acquisition of Subsidiary | 0 | 0 | 91
Parent Company [Member] |  |  |
Cash Flows from Operating Activities: |  |  |
Net Income | 26,534 | 24,662 | 23,360
Undistributed Net Income of Subsidiaries | (15,283) | (11,509) | (10,344)
Stock-Based Compensation Expense | 196 | 227 | 197
Stock-Based Compensation Expense | 287 | 308 | 360
Changes in Other Assets and Other Liabilities | (1,177) | (1,419) | (1,014)
Net Cash Provided By Operating Activities | 10,557 | 12,269 | 12,559
Cash Flows from Investing Activities: |  |  |
Proceeds from the Sale of Securities Available-for-Sale | 0 | 47 | 45
Purchases of Securities Available-for-Sale | 0 | (47) | (45)
Net Cash Used In Investing Activities | 0 | 0 | 0
Cash Flows from Financing Activities: |  |  |
Shares Issued for Stock Option Exercises, net |  | 918 | 1,454
Shares Issued Under the Employee Stock Purchase Plan |  | 494 | 488
Shares Issued for Dividend Reinvestment Plans |  | 886 | 0
Tax Benefit for Exercises of Stock Options | 188 | 59 | 25
Purchase of Treasury Stock | (2,141) | (1,498) | (2,455)
Cash Dividends Paid | (13,092) | (12,700) | (12,407)
Net Cash Provided By Financing Activities | (10,405) | (11,841) | (12,895)
Net Increase (Decrease) in Cash and Cash Equivalents | 152 | 428 | (336)
Cash and Cash Equivalents at Beginning of Year | 3,441 | 3,013 | 3,349
Cash and Cash Equivalents at End of Year | 3,593 | 3,441 | 3,013
Interest on Deposits and Borrowings | 691 | 619 | 620
Shares Issued for Acquisition of Subsidiary | $ 0 | $ 0 | $ 91

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