Partnership's Repurchase Activities (Parenthetical) (Detail) In Thousands, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013
Capital Unit [Line Items]
Partnership's common units authorized for repurchase	6,044
Private Transaction
Capital Unit [Line Items]
Partnership's common units authorized for repurchase	1,150	[1]	1,150

[1] Fiscal year 2013 common unit repurchases include 1.15 million common units acquired in a private transaction.