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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
CONSOLIDATED BALANCE SHEETS    
Held to maturity, fair value (in dollars) $ 245,519 $ 162,528
Preferred stock, par value (in dollars per share)      
Preferred stock, authorized shares 1,100,000 1,100,000
Preferred stock, issued shares 0 0
Preferred stock, outstanding shares 0 0
Common stock, par value (in dollars per share)      
Common stock, authorized shares 185,000,000 185,000,000
Common stock, issued shares 42,091,180 41,867,046
Common stock, outstanding shares 42,091,180 41,867,046