Related Party Transactions Disclosure - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
Mar. 31, 2014	Mar. 31, 2013
Related Party Transaction [Line Items]
Average amount of non-interest bearing advances outstanding	$ 583,929	$ 534,666

Average amount of non-interest bearing advances outstanding to owners during the period.

No definition available.

Name:	ck0000889156_AverageAdvancesToOwners
Namespace Prefix:	ck0000889156_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration