Fair Value Measurement (Details 4) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Financial Liabilities:
Debt obligations	$ (263,280)	$ (288,666)
Senior credit facility, net of original discount on borrowings
Financial Liabilities:
Debt obligations	(260,989)	(286,672)
Other debt obligations
Financial Liabilities:
Debt obligations	(2,291)	(1,994)
Carrying Amount
Financial Assets:
Cash and cash equivalents	18,165	23,158
Financial Liabilities:
Debt obligations	263,280	288,666
Carrying Amount | Senior credit facility, net of original discount on borrowings
Financial Liabilities:
Debt obligations	(260,989)	286,672
Carrying Amount | Other debt obligations
Financial Liabilities:
Debt obligations	(2,291)	1,994
Fair Value
Financial Assets:
Cash and cash equivalents	18,165	23,158
Financial Liabilities:
Debt obligations	263,280	288,666
Fair Value | Senior credit facility, net of original discount on borrowings
Financial Liabilities:
Debt obligations	(260,989)	286,672
Fair Value | Other debt obligations
Financial Liabilities:
Debt obligations	$ (2,291)	$ 1,994