Acquisition (Details 2) (USD $)	0 Months Ended
Feb. 25, 2013
Acquired Intangible assets
Gross cost	$ 18,614,000
Customer relationships
Acquired Intangible assets
Estimated useful life	7 years
Gross cost	12,074,000
Non-compete agreements
Acquired Intangible assets
Estimated useful life	2 years
Gross cost	2,767,000
Trade names
Acquired Intangible assets
Estimated useful life	4 years
Gross cost	704,000
Other
Acquired Intangible assets
Estimated useful life	3 years
Gross cost	$ 3,069,000

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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