Goodwill And Other Intangible Assets (Summary Of Changes In Goodwill By Reportable Business Segment) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 601,666	$ 590,336
Foreign currency	52	(334)
Purchase price adjustments	(3,902)	10,150
Acquisitions	225,733	1,514
Goodwill, Ending Balance	823,549	601,666
North America [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	275,929	274,929
Foreign currency
Purchase price adjustments	785	1,000
Acquisitions
Goodwill, Ending Balance	276,714	275,929
International [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	325,737	315,407
Foreign currency	52	(334)
Purchase price adjustments	(4,687)	9,150
Acquisitions	225,733	1,514
Goodwill, Ending Balance	$ 546,835	$ 325,737

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph e

-Clause 1

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

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-Subparagraph l

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph e

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 34

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

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-URI http://asc.fasb.org/extlink&oid=6905597&loc=d3e13816-109267

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 72

-Subparagraph d

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+ Details

- Definition

The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.

+ References+ Details