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Basis of Presentation and Significant Accounting Policies - Summary of Accounts Receivable Other (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Receivables [Abstract]
Receivables from unconsolidated affiliates	$ 18,207	$ 36,181
Other taxes receivable	23,678	14,934
Accrued unbilled revenue	13,219	15,696
Asset derivatives	5,055	11,641
Employee receivables	3,973	4,532
Other	8,215	6,289
Accounts receivables - other	$ 72,347	$ 89,273

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. Includes assets not subject to a master netting arrangement and not elected to be offset.

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- Definition

Amount of receivables due from an entity that is affiliated with the reporting entity by means of direct or indirect ownership, due within 1 year (or 1 business cycle).

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- Definition

For an unclassified balance sheet, amounts due from an Entity employee, not to include stockholders or officers.

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