Parent Company Only Financial Information (Interim Condensed Statements of Cash Flows) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Operating Activities      
Net income $ 12,510 $ 12,206 $ 10,210
Adjustments to reconcile net income to cash provided by operations      
Share-based payment awards 554 643 615
Depreciation 2,556 2,417 2,521
Deferred income tax expense (benefit) (1,208) 616 389
Changes in operating assets and liabilities which used cash      
Other assets (122) (2,610) 147
Accrued interest and other liabilities 1,954 (1,360) 449
Net cash provided by (used in) operating activities 22,741 19,464 18,860
Investing activities      
Purchases (131,505) (207,035) (165,017)
Purchases of equipment and premises (2,488) (3,578) (2,520)
Net cash provided by (used in) investing activities (64,931) (101,874) (105,203)
Financing activities      
Net increase (decrease) in other borrowed funds 38,325 24,898 21,400
Cash dividends paid on common stock (6,456) (6,074) (5,770)
Proceeds from the issuance of common stock 3,618 2,898 2,302
Common stock repurchased (2,375) (1,980) (1,507)
Common stock purchased for deferred compensation obligations (383) (505) (426)
Net cash provided by (used in) financing activities 58,828 78,740 96,824
Increase (decrease) in cash and cash equivalents 16,638 (3,670) 10,481
Cash and cash equivalents at beginning of year 24,920 28,590 18,109
Cash and cash equivalents at end of year 41,558 24,920 28,590
Parent Company [Member]
     
Operating Activities      
Net income 12,510 12,206 10,210
Adjustments to reconcile net income to cash provided by operations      
Undistributed earnings of subsidiaries (7,003) (7,287) (5,527)
Undistributed earnings of equity securities without readily determinable fair values 74 (459) 160
Share-based payment awards 554 643 615
Depreciation 174 114 123
Net amortization of AFS securities 2 4 7
Deferred income tax expense (benefit) (305) 425 (48)
Changes in operating assets and liabilities which used cash      
Other assets (51) (513) 7
Accrued interest and other liabilities 1,238 (98) 757
Net cash provided by (used in) operating activities 7,193 5,035 6,304
Investing activities      
Maturities, calls, and sales of AFS securities 395 370 585
Purchases 0 0 (3,000)
Purchases of equipment and premises (146) (239) (87)
Repayment of advances to subsidiaries (299) (50) 0
Net cash provided by (used in) investing activities (50) 81 (2,502)
Financing activities      
Net increase (decrease) in other borrowed funds (1,350) (597) 2,772
Cash dividends paid on common stock (6,456) (6,074) (5,770)
Proceeds from the issuance of common stock 3,618 2,898 2,302
Common stock repurchased (2,375) (1,980) (1,507)
Common stock purchased for deferred compensation obligations (383) (505) (426)
Net cash provided by (used in) financing activities (6,946) (6,258) (2,629)
Increase (decrease) in cash and cash equivalents 197 (1,142) 1,173
Cash and cash equivalents at beginning of year 332 1,474 301
Cash and cash equivalents at end of year $ 529 $ 332 $ 1,474