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Contingencies (Detail) - Warranty Liability (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Change in Warranty Liability
Aggregate product warranty liability at beginning of period	$ 776	$ 313
Net aggregate expense related to product warranties	98	415
Aggregate reductions for payments	(72)	(213)
Aggregate product warranty liability at end of period	$ 802	$ 515

- Definition

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.

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