Goodwill and Intangible Assets (Components And Useful Lives Of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
Sep. 30, 2011 years	Dec. 31, 2010
Total Intangible Assets [Member]
Gross Carrying Amount	$ 433,500	$ 352,098
Accumulated Amortization	(97,733)	(87,408)
Total Amortizable Intangible Assets [Member]
Gross Carrying Amount	354,672	274,653
Accumulated Amortization	(97,733)	(87,408)
Customer Relationships, Contracts And Agreements [Member]
Gross Carrying Amount	336,709	251,418
Accumulated Amortization	(89,086)	(74,910)
Useful life in years, minimum	3
Useful life in years, maximum	46
Noncompete Agreements [Member]
Gross Carrying Amount	15,893	21,165
Accumulated Amortization	(7,900)	(11,888)
Useful life in years, minimum	3
Useful life in years, maximum	15
Patents [Member]
Gross Carrying Amount	750	750
Accumulated Amortization	(181)	(118)
Useful life in years, maximum	9
Other [Member]
Gross Carrying Amount	1,320	1,320
Accumulated Amortization	(566)	(492)
Useful life in years, minimum	10
Useful life in years, maximum	15
Non-Amortizable Intangible Assets - Trademarks [Member]
Gross Carrying Amount	78,828	77,445
Accumulated Amortization	$ 0	$ 0

Sum of the gross carrying amounts before accumulated amortization as of the balance sheet date of all intangible assets having statutory or estimated useful lives. The aggregate gross carrying amount (including any previously recognized impairment charges) of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph a(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16323-109275

Name:	us-gaap_FiniteLivedIntangibleAssetsGross
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant