Fair Value of Financial Instruments (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 8,645	$ 34,387	$ 67,993
Restricted assets	4,400	5,500
Collateral investments	1,783	3,624
Long-term debt	101,722	137,374
Fair Value Measurements
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of senior secured notes		137,400
Senior Secured Credit Facility Term Loans Due December 10, 2020, Net
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Long-term debt	$ 101,700
9.75% Senior Secured Notes Due February 15, 2017, Net
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Long-term debt		137,400
9.75% Senior Secured Notes Due February 15, 2017
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Senior secured notes, aggregate outstanding principal amount		$ 140,000