Parent Company (Statements of Cash Flows) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Condensed Financial Statements, Captions [Line Items]      
Net income $ 15,131 $ 15,194 $ 14,620
Net change in other assets (1,635) (2,333) 2,130
Net change in other liabilities 634 (11,282) 8,726
Net cash provided by operating activities 22,564 5,662 31,393
Sale of treasury stock 15 18 14
Proceeds from exercise of stock options 0 280 0
Tax benefit from exercises of stock options 8 20 1
Cash dividends paid (6,432) (6,324) (6,233)
Net cash provided by financing activities 9,038 92,321 98,475
Increase (decrease) in cash and cash equivalents 38,243 39,416 (36,214)
Cash and cash equivalents beginning of period 77,228 37,812 74,026
Cash and cash equivalents end of period 115,471 77,228 37,812
Parent Company [Member]
      
Condensed Financial Statements, Captions [Line Items]      
Net income 15,131 15,194 14,620
Net change in other assets 65 170 (84)
Net change in other liabilities (121) (116) 66
Equity in undistributed earnings of subsidiaries (10,211) [1] (8,721) [1] (7,832) [1]
Net cash provided by operating activities 4,864 6,527 6,770
Sale of treasury stock 15 18 14
Proceeds from exercise of stock options 0 280 (1)
Tax benefit from exercises of stock options 8 20 1
Cash dividends paid (6,432) (6,324) (6,233)
Other, net 226 200 206
Net cash provided by financing activities (6,183) (5,806) (6,013)
Increase (decrease) in cash and cash equivalents (1,319) 721 757
Cash and cash equivalents beginning of period 4,116 3,395 2,638
Cash and cash equivalents end of period $ 2,797 $ 4,116 $ 3,395
[1] Account balances are partially or fully eliminated in consolidation