Stock-Based Compensation - Summary of the Company's Service Based RSU Activity (Details) - RSUs - $ / 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	500,000	500,000	600,000
Granted	100,000	100,000	100,000
Issued	(100,000)	(100,000)	(200,000)
Outstanding at the end of the period	508,395	500,000	500,000
Weighted-Average Grant Date Fair Value
Outstanding at the beginning of the period	$ 31.73	$ 27.76	$ 23.79
Granted	42.05	43.96	42.76
Issued	37.01	28.95	24.13
Outstanding at the end of the period	$ 33.72	$ 31.73	$ 27.76