Schedule II - Valuation and Qualifying Accounts (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Valuation Allowance for Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation allowance, Beginning balance	$ 82,876	$ 6,057	$ 4,327
Valuation allowance, Additions/Charges to Expense	71,826	80,536	4,955
Valuation allowance, Deductions/ Other	(4,318)	(3,717)	(3,225)
Valuation allowance, Ending balance	150,384	82,876	6,057
Valuation Allowance for Accounts Receivable [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation allowance, Beginning balance	17,570	21,524	26,371
Valuation allowance, Additions/Charges to Expense	15,850	20,418	21,914
Valuation allowance, Deductions/ Other	(18,903)	(24,372)	(26,761)
Valuation allowance, Ending balance	$ 14,517	$ 17,570	$ 21,524

Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

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Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively.

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