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Credit Risk (Changes in the Allowance for Doubtful Accounts) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of period	$ 1,733
Charged to expense	185	88
Write-offs	0
Foreign currency translation adjustment	(35)
Balance at end of period	$ 1,883

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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