Classification of Net Deferred Income Tax Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Balance Sheet Classification of Deferred Income Tax Assets and Liabilities [Line Items]
Net deferred income tax assets	$ 454,210	$ 506,039
Prepaid expenses and other current assets
Balance Sheet Classification of Deferred Income Tax Assets and Liabilities [Line Items]
Net deferred income tax assets	195,872	253,664
Other noncurrent assets
Balance Sheet Classification of Deferred Income Tax Assets and Liabilities [Line Items]
Net deferred income tax assets	373,638	374,667
Accrued liabilities
Balance Sheet Classification of Deferred Income Tax Assets and Liabilities [Line Items]
Net deferred income tax assets	(109)	(152)
Other noncurrent liabilities
Balance Sheet Classification of Deferred Income Tax Assets and Liabilities [Line Items]
Net deferred income tax assets	$ (115,191)	$ (122,140)