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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Statement of Financial Position [Abstract]    
Held to maturity, fair value $ 244,136 $ 235,597
Preferred stock, par value (in dollars per share) $ 0 $ 0
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) $ 0 $ 0
Common stock, authorized shares 185,000,000 185,000,000
Common stock, issued shares 31,361,452 35,233,674
Common stock, outstanding shares 31,361,452 35,233,674