Stock-based Compensation - Awards Granted (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based awards granted (in shares)	84,249	0	961,313	900,000
Performance-based stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based awards granted (in shares)	0	0	0	267,770
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based awards granted (in shares)	37,361	32,238	461,494	445,569