Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Equity Attributable to Noncontrolling Interests (Detail)

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Stockholders' Equity - Equity Attributable to Noncontrolling Interests (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Noncontrolling Interest [Abstract]    
Noncontrolling interest, beginning of period $ 58,858us-gaap_MinorityInterest $ 49,598us-gaap_MinorityInterest
Net earnings attributable to noncontrolling interest 5,578us-gaap_NetIncomeLossAttributableToNoncontrollingInterest 2,083us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Foreign currency translation adjustment (233)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest (80)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest
Capital distribution to noncontrolling interests (1,150)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders (1,325)us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
Noncontrolling interest, end of period $ 63,053us-gaap_MinorityInterest $ 50,276us-gaap_MinorityInterest