Stock-Based Compensation - Summary of Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Number of Options
Outstanding, beginning balance (in shares)	259,969
Options granted (in shares)	0
Awards exercised (in shares)	(14,002)
Awards forfeited (in shares)	(132,351)
Outstanding, ending balance (in shares)	113,616	259,969
Exercisable, ending balance (in shares)	113,616
Weighted Average Exercise Price
Outstanding, beginning balance (in dollars per share)	$ 34.68
Options granted (in dollars per share)	0.00
Awards exercised (in dollars per share)	6.99
Awards forfeited (in dollars per share)	35.17
Outstanding, ending balance (in dollars per share)	37.52	$ 34.68
Exercisable, ending balance (in dollars per share)	$ 37.52
Weighted-Average Contractual Life and Aggregate Intrinsic Value
Weighted-average contractual life outstanding	3 months 3 days	6 months 12 days
Weighted-average contractual life exercisable	3 months 3 days
Aggregate intrinsic value outstanding	$ 0	$ 246
Aggregate intrinsic value exercisable	$ 0