CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Statement Of Financial Position [Abstract]
SECURITIES HELD-TO-MATURITY, fair value	$ 920	$ 1,080	$ 2,612
Common stock, par value	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized	80,000,000	80,000,000	80,000,000
Common stock, shares issued	31,519,973	31,496,881	31,477,483
Treasury stock, shares	268,348	266,845	261,454