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Parent Only Financial Information Parent Only Income Statement (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Condensed Financial Statements, Captions [Line Items] |  |  |
Interest and Dividends on Investments | $ 76,915 | $ 70,738 | $ 66,861
Other Operating Income | 1,113 | 1,354 | 1,238
Interest Expense | 5,356 | 4,813 | 5,767
Salaries and Employee Benefits | 34,330 | 33,064 | 30,941
Other Operating Expense | 14,801 | 13,913 | 12,980
Income Tax Benefit | (11,215) | (10,610) | (10,174)
Net Income | 26,534 | 24,662 | 23,360
Parent Company [Member] |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Dividends from Bank Subsidiaries | 11,650 | 13,400 | 13,300
Interest and Dividends on Investments | 117 | 118 | 116
Other Operating Income | 635 | 847 | 578
Total Income | 12,402 | 14,365 | 13,994
Interest Expense | 691 | 619 | 620
Salaries and Employee Benefits | 77 | 80 | 77
Other Operating Expense | 865 | 885 | 754
Total Expense | 1,633 | 1,584 | 1,451
Income Before Income Tax Benefit and Equity in Undistributed Net Income of Subsidiaries | 10,769 | 12,781 | 12,543
Income Tax Benefit | (482) | (372) | (473)
Equity in Undistributed Net Income of Subsidiaries | 15,283 | 11,509 | 10,344
Net Income | $ 26,534 | $ 24,662 | $ 23,360

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- Definition Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition This element represents the undistributed income (or loss) of equity method investments, net of dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporations; such investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32639-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 + Details
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- Definition At the close of the period, the dividends or interest included in caption 1 of the statement of operations. In addition, show as the final item the aggregate of dividends and interest included in the statement of operations in respect of investments in affiliates not held at the close of the period. The total of this column would be expected to agree with the correlative amount shown on the related statement of operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column D)(Column 1)) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611322-123010 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(5)(a)) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611322-123010 + Details
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