Valuation and Qualifying Accounts (Note)

12 Months Ended

Dec. 31, 2012

Valuation and Qualifying Accounts [Abstract]

Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]

VALUATION AND QUALIFYING ACCOUNTS

Accounts receivable balances are stated net of allowance for doubtful accounts. Historically, the Company has not experienced significant write-offs. The Company records allowances for doubtful accounts when it is probable that the accounts receivable balance will not be collected. The following table provides a summary of the allowance for doubtful accounts balances and activity for the years ended December 31, 2012, 2011 and 2010:

	Year Ended December 31,
(in thousands)	2012			2011			2010
Beginning balance-allowance for doubtful accounts	$	14,787		$	14,924		$	13,909
Additions-charged to expense	9,201			5,046			6,451
Amounts written off	(2,889		)	(6,058		)	(6,008		)
Other (primarily changes in foreign currency exchange rates)	413			875			572
Ending balance-allowance for doubtful accounts	$	21,512		$	14,787		$	14,924