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Significant Accounting Policies - Reconciliation of Reserve for Warranty Expense (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accounting Policies [Abstract]
Beginning balance	$ 7,539	$ 8,140	$ 8,427
Provision	5,177	7,507	8,614
Claims paid/costs incurred	(6,310)	(8,108)	(8,901)
Ending balance	$ 6,406	$ 7,539	$ 8,140

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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