Stock-Based Compensation - Summary of the Company's PRSU Activity (Details) - PRSUs - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Summary of the Company's RSU activity
Outstanding at the beginning of the period	400,000	400,000	500,000
Granted	200,000	100,000	100,000
Additional performance shares	100,000	100,000	100,000
Issued	(300,000)	(200,000)	(300,000)
Outstanding at the end of the period	375,375	400,000	400,000
Weighted-Average Grant Date Fair Value
Outstanding at the beginning of the period	$ 36.59	$ 31.68	$ 24.60
Granted	43.96	43.96	43.01
Additional performance shares	28.09	42.23	19.02
Issued	28.15	24.95	19.01
Outstanding at the end of the period	$ 42.66	$ 36.59	$ 31.68