Consolidated Statements of Net Income (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Interest and dividend income:      
Interest and fees on loans $ 89,349 $ 76,050 $ 66,157
Taxable 3,919 6,901 10,868
Tax-exempt 209 216 218
Dividends on equity securities 1,383 1,444 1,033
Interest on certificates of deposit    26 34
Other interest and dividend income 344 332 502
Total interest and dividend income 95,204 84,969 78,812
Interest expense:      
Interest on deposits 17,053 15,739 17,738
Interest on borrowings 3,082 3,206 3,234
Total interest expense 20,135 18,945 20,972
Net interest income 75,069 66,024 57,840
Provision for loan losses 6,470 8,581 3,663
Net interest income, after provision for loan losses 68,599 57,443 54,177
Non-interest income:      
Customer service fees 7,129 6,645 5,867
Loan fees 508 339 584
Mortgage banking gains, net 583 2,371 2,125
Gain on sales of securities, net 9,636 5,568 4,464
Income from bank-owned life insurance 1,195 1,201 1,221
Equity income on investment in affiliate bank    310 1,110
Gain on sale of investment in affiliate bank    4,819   
Other income 365 8 17
Total non-interest income 19,416 21,261 15,388
Non-interest expenses:      
Salaries and employee benefits 39,618 36,386 29,474
Occupancy and equipment 8,798 7,932 7,831
Data processing 4,274 3,511 2,909
Marketing and advertising 2,949 2,537 2,450
Professional services 2,308 2,966 2,685
Foreclosed real estate 479 599 328
Deposit insurance 2,053 1,760 1,893
Other general and administrative 4,036 4,257 3,424
Total non-interest expenses 64,515 59,948 50,994
Income before income taxes 23,500 18,756 18,571
Provision for income taxes 8,071 6,330 6,601
Net income $ 15,429 $ 12,426 $ 11,970
Income per share:      
Basic $ 0.71 $ 0.57 $ 0.55
Diluted $ 0.70 $ 0.57 $ 0.55
Weighted average shares:      
Basic 21,637,344 21,629,668 21,805,143
Diluted 21,987,809 21,858,381 21,931,863