Stock-Based Compensation - Summary of Restricted Stock Awards Activity (Details) - Restricted Stock and Restricted Stock Units Awards	9 Months Ended
	Sep. 30, 2016 $ / shares shares
Number of Shares
Non vested, beginning balance (in shares) | shares	293,419
Shares granted (in shares) | shares	336,125
Vested shares (in shares) | shares	(121,298)
Shares forfeited (in shares) | shares	(30,069)
Non vested, ending balance (in shares) | shares	478,177
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	16.34
Vested shares (in dollars per share) | $ / shares	38.18
Shares forfeited (in dollars per share) | $ / shares	26.64
Non vested, ending balance (in dollars per share) | $ / shares	$ 21.89