Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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- Definition

Amount of cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.

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Accrued Liability Associated with Relocation and Restructuring Programs (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Restructuring Cost and Reserve [Line Items]
Balance at beginning of period			$ 790
Costs Accrued	18	348	91	10,750
Payments			679
Balance at end of period	202		202
Due within 12 months	202		202
One-time termination benefits to employees - 2010 restructuring and relocation programs
Restructuring Cost and Reserve [Line Items]
Balance at beginning of period			8
Costs Accrued			71
Payments			75
Balance at end of period	4		4
Due within 12 months	4		4
One-time termination benefits to employees - 2011 restructuring program
Restructuring Cost and Reserve [Line Items]
Balance at beginning of period			782
Costs Accrued			20
Payments			604
Balance at end of period	198		198
Due within 12 months	$ 198		$ 198