Income Tax (Deferred Liability) (Details Textuals) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred income tax assets:
Accrued expenses	$ 1,455	$ 0
Deferred transaction costs	863	0
Net operating loss carryforward - non-current	51,488	45,569
Investment in the Partnership	5,981	20,483
Other comprehensive income	0	77
Alternative minimum tax carry forward (AMT)	8	8
Deferred Tax Assets, Gross	59,795	66,137
Less: valuation allowance	(5,981)	(20,483)
Deferred Tax Assets, Net of Valuation Allowance	53,814	45,654
Components of Deferred Tax Liabilities [Abstract]
Property, plant, equipment, and intangible assets-current	(7,075)	(501)
Property, plant, equipment, and intangible assets - non-current	(184,889)	(129,207)
Other comprehensive income	(56)	0
Other	(2,424)	(1,634)
Net deferred tax liability	$ (140,630)	$ (85,688)