Stock-Based Compensation - Stock Option Rollforward (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Number of Shares
Granted (in shares)		0	0
Expired (in shares)	0	0	0
Weighted Average Remaining Contractual Term
Vested (in years)	0 years
Employee Stock Option
Number of Shares
Outstanding at the beginning of the period (in shares)	7,101	7,101	7,101
Granted (in shares)	0	0	0
Exercised (in shares)	(7,101)	0	0
Outstanding at the end of the period (in shares)	0	7,101	7,101
Options exercisable at the end of the period (in shares)	0
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 5.75	$ 5.75	$ 5.75
Exercised (in dollars per share)	5.75
Outstanding at the end of the period (in dollars per share)	0.00	$ 5.75	$ 5.75
Options exercisable at the end of the period (in dollars per share)	$ 0.00
Weighted Average Remaining Contractual Term
Exercisable (in years)	0 years
Aggregate Intrinsic Value
Vested	$ 0
Exercisable	$ 0