Stock-Based Compensation - Summary of the Company's PRSU Activity (Details) - PRSUs - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Summary of the Company's RSU activity
Outstanding at the beginning of the period	400,000	500,000	500,000
Granted	100,000	100,000	200,000
Additional performance shares	100,000	100,000	300,000
Issued	(200,000)	(300,000)	(500,000)
Outstanding at the end of the period	441,599	400,000	500,000
Weighted-Average Grant Date Fair Value
Outstanding at the beginning of the period	$ 31.68	$ 24.60	$ 16.93
Granted	43.96	43.01	28.27
Additional performance shares	42.23	19.02	10.72
Issued	24.95	19.01	10.64
Outstanding at the end of the period	$ 36.59	$ 31.68	$ 24.60