Fair Value Measurements (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011	Mar. 31, 2012 2.58% Senior Euro Notes [Member]	Mar. 31, 2012 4.5% Senior Notes [Member]	Mar. 31, 2012 4.2% Senior Notes [Member]	Feb. 29, 2012 AT Films [Member]	Jan. 31, 2011 AT Films [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of our revolving facility and senior debt	$ 785,500,000
Carrying value of our revolving facility and senior debt	766,700,000
Stated interest rate				2.58%	4.50%	4.20%
Transfers of assets or liabilities between Level 1 and Level 2	0	0
Contingent consideration	1,500,000		3,000,000				1,500,000
Accrued expenses	$ 129,255,000		$ 130,696,000				$ 1,500,000	$ 1,500,000