Stock Based Compensation - Summary of Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Number of Shares
Number of shares, beginning balance	99,775
Number of shares, forfeitures or expirations	54,370
Number of shares, ending balance	45,405	99,775
Weighted Average Exercise Price
Weighted average exercise price, beginning balance (in dollars per share)	$ 54.15
Weighted average exercise price, forfeitures or expirations (in dollars per share)	54.24
Weighted average exercise price, ending balance (in dollars per share)	$ 54.05	$ 54.15
Additional Disclosures
Number of shares, vested or expected to vest	45,405
Number of shares, exercisable	45,405
Weighted average exercise price, vested or expected to vest (in dollars per share)	$ 54.05
Weighted average exercise price, exercisable (in dollars per share)	$ 54.05
Weighted average remaining contractual life (years)	1 month 18 days	10 months 24 days
Weighted average remaining contractual life (years), vested or expected to vest	1 month 18 days
Weighted average remaining contractual life (years), exercisable	1 month 18 days
Options, outstanding, intrinsic value	$ 0	$ 0
Options vested or expected to vest, intrinsic value	0
Options exercisable, intrinsic value	$ 0