Income Taxes (Current and Non-current deferred assets/liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current and Non-current Deferred Tax Assets(Liabilities) [Abstract]
Current deferred tax assets	$ 33,613	$ 35,813
Current deferred tax liabilities	(6,259)	(275)
Non-current deferred tax assets	74,597	74,850
Non-current deferred tax liabilities	(168,497)	(178,393)
Net deferred tax liabilities	$ (66,546)	$ (68,005)

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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Amount after allocation of valuation allowances of noncurrent deferred tax asset attributable to deductible temporary differences and carryforwards. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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- Definition

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

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