Net Income Per Common Share (Tables)

6 Months Ended

Jun. 30, 2011

Net Income Per Common Share (Tables) [Abstract]

Summary of weighted average number of common shares outstanding

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2011		2010		2011		2010
Denominator:
Basic common shares outstanding		44,658		45,724		45,122		45,699
Effect of dilutive stock options and restricted stock		360		833		429		742
Diluted common shares outstanding		45,018		46,557		45,551		46,441