Balance Sheet Details - Prepaid Expenses and Other Current Assets (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Non-trade receivables	$ 7,212us-gaap_NontradeReceivablesCurrent	$ 6,547us-gaap_NontradeReceivablesCurrent
Prepaid expenses	37,303us-gaap_PrepaidExpenseCurrent	37,385us-gaap_PrepaidExpenseCurrent
Derivative assets	22,808us-gaap_DerivativeAssetsCurrent	14,342us-gaap_DerivativeAssetsCurrent
Other current assets	2,932us-gaap_OtherAssetsCurrent	2,798us-gaap_OtherAssetsCurrent
Total	$ 70,255	$ 61,072

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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The sum of amounts currently receivable other than from customers. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Aggregate carrying amount, as of the balance sheet date, of current assets not separately disclosed in the balance sheet. Current assets are expected to be realized or consumed within one year (or the normal operating cycle, if longer).

+ References

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Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Amount of asset related to consideration paid in advance for costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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