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Consolidated Statements of Stockholders' Equity (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Unrealized loss on cash flow hedges, tax	$ 94	$ 265	$ 164
Postretirement benefit adjustment, tax	60	58	67
Other Comprehensive Income (Loss)
Unrealized loss on cash flow hedges, tax	94	265	164
Postretirement benefit adjustment, tax	60	58	67
Accumulated Other Comprehensive Income/(Loss)
Unrealized loss on cash flow hedges, tax	94	265	164
Postretirement benefit adjustment, tax	$ 60	$ 58	$ 67

Tax effects of the increase (decrease) to accumulated comprehensive income during the period related to benefit plans. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

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- Definition

Tax effect on the change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

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