Summary of Significant Accounting Policies - Deferred Financing Fees (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
First and Second Lien Credit Agreement | Interest Expense
Deferred Financing Fees
Amortization of financing costs	$ 635	$ 728	$ 1,100