CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
CONSOLIDATED BALANCE SHEETS
Securities held to maturity, fair values (in dollars)	$ 52,892	$ 60,395
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	23,824,972	22,860,368
Common stock, shares outstanding	22,212,764	21,147,736
Treasury stock, shares	1,612,208	1,712,632