Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Statement of Financial Position [Abstract]    
Available-for-sale securities, amortized cost $ 517,614 $ 490,420
Common stock, shares authorized 15,000,000 15,000,000
Common stock, shares issued 7,723,023 7,671,846
Common stock, shares outstanding 7,723,023 7,671,846
Common stock, shares to be issued 12,761 5,130