Income Per Share (Tables)

6 Months Ended

Jun. 30, 2011

Income Per Share (Tables) [Abstract]

Weighted average number of common shares outstanding

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Weighted average shares outstanding		48,370		47,098		48,296		47,055
Effect of dilutive stock-based compensation		723		—		783		—
Effect of convertible notes		1,851		—		2,494		—
Effect of common stock warrants		—		—		350		—
Weighted average shares outstanding — assuming dilution		50,944		47,098		51,923		47,055