CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
CONSOLIDATED BALANCE SHEETS
Securities held to maturity, fair values (in dollars)	$ 51,634	$ 52,490
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	26,525,466	26,525,466
Common stock, shares outstanding	25,254,448	25,148,522
Treasury stock, shares	1,271,018	1,376,944