Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Statement Of Financial Position [Abstract]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	32,938,654	32,532,991
Common stock, shares outstanding	32,938,654	32,532,991
Treasury stock at cost, shares	1,171,886	1,171,886