Interest rate stated in the contractual debt agreement.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

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

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Condensed Consolidating Financial Information (Details Textual)	Apr. 01, 2012	Apr. 01, 2012 Senior Note Due 2017 [Member]	Apr. 01, 2012 Senior Notes Due 2021 [Member]	Feb. 10, 2011 Senior Notes Due 2021 [Member]	Apr. 01, 2012 Seven Point Seven Five Percent Senior Notes [Member]	Oct. 20, 2009 Seven Point Seven Five Percent Senior Notes [Member]
Debt Instrument [Line Items]
Notes bear interest at a rate	7.75%	7.75%	6.625%	6.625%	7.75%	7.75%
Condensed Consolidating Financial Information (Textual) [Abstract]
Percentage of subsidiary owned			100.00%