Redeemable Noncontrolling Interest (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended	1 Months Ended
Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2010	Apr. 30, 2010 Specialty Sports Venture [Member]	Apr. 23, 2010 Specialty Sports Venture [Member]
Remaining percentage of ownership interest acquired					30.70%
Payments made to acquire noncontrolling interest	$ 0	$ 0	$ 31,000	$ 31,000
Consolidated ownership interest					100.00%
Acquisition of noncontrolling interest			$ 2,690	$ 2,600

The cash outflow associated with the purchase of noncontrolling interest during the period.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3213-108585

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 17

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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_PaymentsToAcquireAdditionalInterestInSubsidiaries
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration