Stock-Based Compensation (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense (costs of sales and general and administrative)	$ 3,200,000	$ 2,200,000	$ 9,400,000	$ 7,300,000
Income tax benefit related to stock-based compensation	(400,000)		(3,200,000)
Impact on cash flow due to taxes paid related to net share settlement of equity awards	$ 800,000	$ 100,000	$ 8,900,000	$ 5,400,000