Debt (Details Textual) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011
Debt (Textual)
Amount of facility	$ 600,000
Borrowing capacity description	fluctuates with the level of eligible accounts receivable and inventory and may be less than $600,000,000 at any point in time
Variable rate basis for borrowings	1, 2, 3 or 6 months
Applicable margin	1.75%
Payment period to be classified as short-term debt	1 year
Minimum [Member]
Debt (Textual)
Interest rate margin	1.75%
Maximum [Member]
Debt (Textual)
Interest rate margin	2.25%
Bank credit facility expiring November 16, 2012 [Member]
Debt (Textual)
Amount of facility	1,500,000
Bank credit facility expiring December 15, 2016 [Member]
Debt (Textual)
Amount of facility	$ 600,000

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant