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Receivables - Additional Information (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	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts receivables	$ 22,324		$ 22,324		$ 19,450
Bad debt expense, Net	1,553	1,445	2,701	4,875
Charge-offs, foreign currency translation and other adjustments	15	(513)	173	(2,435)
Receivables deemed past due or uncollectible	$ 25,990		$ 25,990		$ 22,785

Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected).

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