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Significant Components of Non-Current Deferred Tax Liabilities and Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Income Tax Disclosure [Abstract]    
Fixed assets $ 11,651 $ 12,427
Intangible assets 306,009 245,020
Total non-current deferred tax liabilities 317,660 257,447
Deferred compensation 22,598 13,576
Net operating loss carryforwards 3,843 6,658
Valuation allowance for deferred tax assets (485) (417)
Total non-current deferred tax assets 25,956 19,817
Net non-current deferred tax liability $ 291,704 $ 237,630