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Commitments, Contingencies and Other Commitments, Contingencies and Other (Table 3) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Commitments Contingencies and Other [Abstract]
Allowance for Doubtful Accounts, Premiums and Other Receivables	$ 22,437	$ 18,219	$ 15,258	$ 13,682
Financing Receivable, Allowance for Credit Losses, Write-downs	0	0	0
Provision for Doubtful Accounts	$ 4,218	$ 2,961	$ 1,576

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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