Stock-Based Compensation - Summary of Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Number of Options
Outstanding, beginning balance (in shares)	329,872
Options granted (in shares)	0
Awards exercised (in shares)	(4,000)
Awards forfeited (in shares)	(53,025)
Outstanding, ending balance (in shares)	272,847	329,872
Exercisable, ending balance (in shares)	272,847
Weighted Average Exercise Price
Outstanding, beginning balance (in dollars per share)	$ 33.65
Options granted (in dollars per share)	0.00
Awards exercised (in dollars per share)	7.00
Awards forfeited (in dollars per share)	37.09
Outstanding, ending balance (in dollars per share)	33.37	$ 33.65
Exercisable, ending balance (in dollars per share)	$ 33.37
Weighted-Average Contractual Life (Years) and Aggregate Intrinsic Value (In thousands)
Weighted-average contractual life outstanding, ending balance	9 months 11 days	1 year 3 months 18 days
Weighted-average contractual life exercisable, ending balance	9 months 11 days
Aggregate intrinsic value outstanding, ending balance	$ 345	$ 359
Aggregate intrinsic value exercisable, ending balance	$ 345