Commitments and Contingencies - Activity With Respect to Claims and Contingencies (Detail) - USD ($) $ in Thousands		3 Months Ended				9 Months Ended
		Sep. 30, 2015		Sep. 30, 2014		Sep. 30, 2015		Sep. 30, 2014
Loss Contingencies [Line Items]
Claims and contingencies, Balance at beginning of period		$ 13,995		$ 126,074		$ 15,574		$ 125,880
Claims and contingencies, Balance at end of period		42,642		14,494		42,642		14,494
Other claims and contingencies [Member]
Loss Contingencies [Line Items]
Additional accruals	[1]	32,901		11,603		44,455		27,816
Payments, net	[2]	(4,254)		(8,532)		(17,387)		(21,804)
CUSO RSA [Member]
Loss Contingencies [Line Items]
Additional accruals		0		2,019		0		2,019
Payments, net		0	[3]	(1,809)	[4]	0	[3]	(4,556)	[4]
Elimination of intercompany transactions	[5]	$ 0		$ (114,861)		$ 0		$ (114,861)

[1] Consists of accruals for legal fees and settlement amounts.

[2] Consists of payments for legal and other contingencies.

[3] We consolidated the CUSO in our consolidated financial statements as of September 30, 2014 and, as a result, we eliminated from our consolidated financial statements the amount of payments under the CUSO RSA that we made following the CUSO Consolidation. See below under "- Guarantees - CUSO RSA - Year-To-Date 2015 and Projected Future CUSO RSA Payments," for information on the amount of payments that we made under the CUSO RSA in the nine months ended September 30, 2015. See Note 7 - Variable Interest Entities, for a further discussion of the CUSO Consolidation.

[4] Consists of payments made under the CUSO RSA.

[5] As a result of the CUSO Consolidation, in the three and nine months ended September 30, 2014, we eliminated from our consolidated financial statements the contingent liability related to the CUSO RSA that we had previously recorded.