Related Party Transactions (Details) (Carlyle, USD $) In Thousands, unless otherwise specified	9 Months Ended
Jun. 30, 2012	Jun. 30, 2011
Carlyle
Related party transactions
Expected annual consulting fee	$ 3,000
Additional fees associated with other future transactions recorded in selling, general and administrative expenses.	2,250	2,250
One-time transaction fee paid upon effectiveness of the merger		30,000
Portion of transaction fee recorded in merger expenses		14,324
Portion of transaction fee included in deferred financing costs		$ 15,676

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 57

-Paragraph 2

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Name:	us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration