Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Restricted Stock Unit Activity

The table below summarizes restricted stock unit activity for the year ended December 31, 2014:

	Restricted Stock Units		Weighted Average Grant Date Fair Value
Restricted stock units outstanding at December 31, 2013	1,078,049		$	35.69
Granted	467,720		48.56
Released	(531,024	)	30.64
Cancelled	(1,062	)	47.08
Restricted stock units outstanding at December 31, 2014	1,013,683		44.34