Acquisitions and Dispositions - Preliminary Purchase Price Allocation to Identifiable Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	0 Months Ended
Jun. 20, 2012
Business Acquisition [Line Items]
Intangible assets	$ 215,600
Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets	184,500
Weighted - Average Life	17 years
Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Intangible assets	28,500
Weighted - Average Life	20 years
Other [Member]
Business Acquisition [Line Items]
Intangible assets	$ 2,600
Weighted - Average Life	3 years

The amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will be amortized.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph e

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 52

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Name:	us-gaap_BusinessAcquisitionPurchasePriceAllocationAmortizableIntangibleAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant