Summary of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014 item	Dec. 31, 2013 item	Dec. 31, 2012
Cash, Cash Equivalents and Restricted Cash
Restricted cash	$ 33,860	$ 33,860
Foreign Currency
Foreign currency transaction gains (loss)	$ (58,316)	$ (36,201)	$ (10,223)
Derivative Instruments and Hedging Activities
Targeted percentage of debt portfolio to be fixed with interest rates	75.00%
Number of derivative instrument with contingent features of credit risk	0	0
The 7 1/4% Notes
Debt
Stated interest rate (as a percent)	7.25%	7.25%	7.25%
6 3/4% Notes
Debt
Stated interest rate (as a percent)	6.75%	6.75%	6.75%

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Represents the number of derivative instruments with contingent features of credit risk.

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No definition available.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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- Definition

Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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- Definition

The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

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The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. For a classified balance sheet represents the current portion only (the noncurrent portion has a separate concept); there is a separate and distinct element for unclassified presentations.

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