Compensation Plans - Stock Options Activity (Details)	12 Months Ended
	Dec. 31, 2016 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Grant-date fair value (in dollars per share)	$ 45.88
Expected volatility	76.30%
Expected term (in years)	5 years
Risk-free rate	1.20%
Stock Option Activity
Number of options outstanding at January 1, 2016 (in shares) | shares	0
Number of options granted (in shares) | shares	282,000
Number of options exercised (in shares) | shares	0
Number of options outstanding at December 31, 2016 (in shares) | shares	282,000
Stock Options Weighted Average Exercise Price
Options outstanding, weighted average exercise price at January 1, 2016 (in dollars per share)	$ 0.00
Options granted, weighted average exercise price (in dollars per share)	74.21
Options exercised, weighted average exercise price (in dollars per share)	0.00
Options outstanding, weighted average exercise price at December 31, 2016 (in dollars per share)	$ 74.21
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options vested and expected to vest at December 31, 2016 (in shares) | shares	282,000
Options vested and expected to vest at December 31, 2016, weighted average exercise price (in dollars per share)	$ 74.21
Options vested and expected to vest at December 31, 2016, remaining term	6 years 8 months
Options vested and expected to vest at December 31, 2016, aggregate intrinsic value | $	$ 12,705,250
Options exercisable at December 31, 2016 (in shares) | shares	0
Options exercisable at December 31, 2016, weighted average exercise price (in dollars per share)	$ 0.00
Options exercisable at December 31, 2016, weighted average remaining term	0 years
Options exercisable at December 31, 2016, aggregate intrinsic value | $	$ 0
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Unrecognized compensation cost for options granted | $	$ 11,800,000
Unrecognized compensation cost, period for recognition	2 years 8 months