Stock-Based Compensation - Summary of Restricted Stock Awards Activity (Details) - Restricted Stock	3 Months Ended
	Mar. 31, 2016 $ / shares shares
Number of Shares
Non vested, beginning balance (in shares) | shares	293,419
Shares granted (in shares) | shares	315,231
Vested shares (in shares) | shares	(104,082)
Shares forfeited (in shares) | shares	0
Non vested, ending balance (in shares) | shares	504,568
Weighted-Average Grant Price and Fair Value
Non vested, beginning balance (in dollars per share) | $ / shares	$ 35.86
Shares granted (in dollars per share) | $ / shares	15.64
Vested shares (in dollars per share) | $ / shares	37.59
Shares forfeited (in dollars per share) | $ / shares	0.00
Non vested, ending balance (in dollars per share) | $ / shares	$ 22.87