Stock-based Compensation - Summary of SAR Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Weighted Average Exercise Price
Beginning Balance Outstanding (in dollars per share)	$ 19.07	$ 19.81	$ 30.43
Ending Balance Outstanding (in dollars per share)	$ 14.85	$ 19.07	$ 19.81	$ 30.43
2014 Long Term Incentive Plan | Stock Appreciation Rights (SARs)
SAR Shares
Outstanding and unvested at beginning of period (in shares)	486,470.00	1,596,625	1,616,625
Expired (shares)	(20,000)	(1,110,155)	(20,000)
Outstanding and unvested at end of period (in shares)	466,470.00	486,470.00	1,596,625	1,616,625
Weighted Average Exercise Price
Beginning Balance Outstanding (in dollars per share)	$ 42.71	$ 36.49	$ 36.45
Expired (in dollars per share)	42.71	33.76	33.76
Ending Balance Outstanding (in dollars per share)	$ 42.71	$ 42.71	$ 36.49	$ 36.45
Outstanding, weighted average contractual term remaining	7 months 6 days	1 year 6 months	1 year 6 months	2 years 6 months