CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Common shares, par value	$ 0.01	$ 0.01
Common shares, shares authorized	100,000,000	100,000,000
Common shares, shares issued	11,132,549	11,125,883
Common shares, shares outstanding	10,596,220	10,589,554
Treasury stock, shares	536,329	536,329