Annual report pursuant to Section 13 and 15(d)

Condensed Consolidated Statements of Changes in Stockholders' Equity (Parenthetical)

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Condensed Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Condensed Consolidated Statements of Changes in Stockholders' Equity [Abstract]      
Other comprehensive income, tax $ 339 $ 4,167 $ 325
Dividends on common stock, per share $ 0.37 $ 0.28 $ 0.25
Repurchase of preferred stock, shares   35,595  
Stock purchased under stock repurchase plan, shares 970,265    
Issuance of common stock, shares     7,477,273
Issuance of common stock under Dividend Reinvestment Plan, shares 45,502 11,932 19,085
Issuance of common stock under Stock Incentive Plan, shares 2,376 29,625 7,016
Issuance/Vesting of restricted stock under Stock Incentive Plan, shares 15,492 17,312 24,939
Issuance of common stock for services rendered, shares 37,134 46,806 42,680
Net settle for taxes on Restricted Stock Awards, shares 3,670