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Commitments, Contingencies and Guarantees - Narrative (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]
Rent expense	$ 7,300,000us-gaap_LeaseAndRentalExpense	$ 3,900,000us-gaap_LeaseAndRentalExpense	$ 1,900,000us-gaap_LeaseAndRentalExpense
Warranty liability	6,025,000	3,691,000
Warranty liability recorded as element of long-term liabilities	$ 400,000

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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