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Fair value at acquisition-date of the equity interest in the acquiree held by the acquirer, immediately before the acquisition date for businesses combined in stages.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Acquisition - Additional Information (Detail) (USD $)	0 Months Ended
Acquisition - Additional Information (Detail) (USD $)	Sep. 27, 2014	Feb. 14, 2015	Aug. 30, 2014
Business Acquisition [Line Items]
Goodwill		$ 384,013,000us-gaap_Goodwill	$ 367,829,000us-gaap_Goodwill
Interamerican Motor Corporation [Member]
Business Acquisition [Line Items]
Acquisition of outstanding stock	75,700,000
Goodwill	16,200,000
Purchase price allocation, intangible assets	$ 8,300,000