Income Per Share (Tables)

6 Months Ended

Jun. 30, 2013

Weighted Average Number of Common Shares Outstanding

The weighted average number of common shares outstanding is calculated as follows (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2013		2012		2013		2012
Weighted average shares outstanding - basic		51,244		48,974		51,832		48,844
Effect of dilutive stock-based compensation		504		675		533		654
Effect of convertible notes		7,464		2,803		7,682		1,904
Effect of common stock warrants		5,678		722		5,940		—
Weighted average shares outstanding - diluted		64,890		53,174		65,987		51,402