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Parent-Only Financial Information (Selected Quarterly Financial Data (Unaudited)) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Selected Operating Data: |  |  |  |  |  |  |  |  |  |  |
Interest income | $ 22,620 | $ 23,380 | $ 22,954 | $ 23,516 | $ 23,350 | $ 22,690 | $ 22,760 | $ 22,739 | $ 92,470 | $ 91,539 | $ 91,017
Interest expense | 3,938 | 4,060 | 4,199 | 4,751 | 5,392 | 5,691 | 5,747 | 5,814 | 16,948 | 22,644 | 25,413
Net interest income | 18,682 | 19,320 | 18,755 | 18,765 | 17,958 | 16,999 | 17,013 | 16,925 | 75,522 | 68,895 | 65,604
Provision for loan losses | 416 | 817 | 417 | 277 | 1,875 | 502 | 544 | 615 | 1,927 | 3,536 | 12,589
Net interest income after provision for loan losses | 18,266 | 18,503 | 18,338 | 18,488 | 16,083 | 16,497 | 16,469 | 16,310 | 73,595 | 65,359 | 53,015
Bargain purchase gain, net of tax |  |  |  |  |  |  |  |  |  |  | 3,560
Other income | 2,619 | 2,588 | 1,698 | 3,256 | 1,471 | 1,710 | 1,430 | 3,975 | 10,161 | 8,586 | 11,835
Other expenses | 12,989 | 13,309 | 13,209 | 14,366 | 12,527 | 12,028 | 11,801 | 12,642 | 53,873 | 48,998 | 41,530
Income before income tax expense | 7,896 | 7,782 | 6,827 | 7,378 | 5,027 | 6,179 | 6,098 | 7,643 | 29,883 | 24,947 | 23,320
Income tax expense | 2,940 | 2,682 | 2,528 | 2,586 | 1,786 | 2,285 | 2,150 | 2,695 | 10,736 | 8,916 | 6,497
Net income | 4,956 | 5,100 | 4,299 | 4,792 | 3,241 | 3,894 | 3,948 | 4,948 | 19,147 | 16,031 | 16,823
Net income per common share-basic | $ 0.09 | $ 0.09 | $ 0.08 | $ 0.09 | $ 0.06 | $ 0.07 | $ 0.07 | $ 0.10 | $ 0.35 | $ 0.30 | $ 0.30
Net income per common share-diluted | $ 0.08 | $ 0.09 | $ 0.08 | $ 0.09 | $ 0.06 | $ 0.07 | $ 0.07 | $ 0.09 | $ 0.34 | $ 0.29 | $ 0.30
Parent Company |  |  |  |  |  |  |  |  |  |  |
Selected Operating Data: |  |  |  |  |  |  |  |  |  |  |
Income tax expense |  |  |  |  |  |  |  |  | (25) | 255 | (224)
Net income |  |  |  |  |  |  |  |  | $ 19,147 | $ 16,031 | $ 16,823

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