Income Taxes Income Taxes - Deferred Taxes By Balance Sheet Account (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Deferred income taxes - current assets	$ 143,248	$ 114,250
Deferred income taxes - long-term assets	76,375	91,090
Other current liabilities	(552)	(4,513)
Deferred income taxes - long term liabilities	(34,250)	(32,029)
Net deferred tax asset	$ 184,821	$ 168,798

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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- Definition

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