AR and Allowance for Doubtful Accounts (Tables)

12 Months Ended

Dec. 31, 2012

Accounts Receivable and Allowance for Doubtful Accounts [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

								Exchange
				Charged				Rate
		Balance at		to Costs		Write-Offs		Changes		Balance
		Beginning		and		Charged to		And Other		at End
		of Period		Expenses		Allowance		Adjustments		of Period
ALLOWANCE FOR DOUBTFUL ACCOUNTS
Year ended December 31, 2012	$	4,569	$	2,072	$	(737)	$	495	$	6,399
Year ended December 31, 2011	$	4,278	$	855	$	(607)	$	43	$	4,569
Year ended December 31, 2010	$	4,002	$	860	$	(538)	$	(46)	$	4,278