SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Allowance for Doubtful Accounts
VALUATION AND QUALIFYING ACCOUNTS
Balance at Beginning of Period	$ 20,283	$ 24,495	$ 27,853
Charged to Cost and Expenses	7,880	9,962	9,318
Due to Currency Translation Adjustments	(677)	(336)	694
Other	(9,657)	(13,838)	(13,370)
Balance at End of Period	17,829	20,283	24,495
Deferred Tax Assets - Valuation Allowance
VALUATION AND QUALIFYING ACCOUNTS
Balance at Beginning of Period	29,469	22,744	21,459
Charged to Cost and Expenses	47,575	4,754	(980)
Due to Currency Translation Adjustments	(312)	(347)	(75)
Other	22,885	2,318	2,340
Balance at End of Period	$ 99,617	$ 29,469	$ 22,744