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Income Taxes Deferred Tax Summary (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Abstract]
Net deferred tax assets	$ 14,767us-gaap_DeferredTaxAssetsNetCurrent	$ 14,177us-gaap_DeferredTaxAssetsNetCurrent
Deferred Tax Liabilities, Noncurrent	(101,605)	(61,948)
Deferred Tax Assets (Liabilities), Net	$ (86,838)us-gaap_DeferredTaxAssetsLiabilitiesNet	$ (47,771)us-gaap_DeferredTaxAssetsLiabilitiesNet

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards expected to be realized or consumed within one year or operating cycle, if longer.

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