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Schedule of Assets Held Under Capital Lease Obligations (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Capital Leased Assets [Line Items]
Total capital lease assets, Gross	$ 28,776	$ 23,852
Less accumulated amortization	(6,845)	(5,028)
Total capital lease assets, Net	21,931	18,824
Building
Capital Leased Assets [Line Items]
Total capital lease assets, Gross	250	250
Machinery and Equipment
Capital Leased Assets [Line Items]
Total capital lease assets, Gross	$ 28,526	$ 23,602

Property, plant, or equipment held under lease agreements classified as an asset.

The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization.