Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent, utilities, PTO and accrued bonuses and commissions. It also includes aggregate carrying amount, as of the balance sheet date, of current obligations not separately disclosed in the balance sheet due to materiality considerations. Current liabilities are expected to be paid within one year (or the normal operating cycle, if longer).

No definition available.

Significant Contracts (Detail) (USD $)	12 Months Ended			1 Months Ended		12 Months Ended		12 Months Ended					0 Months Ended				1 Months Ended	12 Months Ended
Significant Contracts (Detail) (USD $)	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012	Jan. 31, 2014 Surplus Contract Option	Feb. 29, 2012 Surplus Contract Option	Sep. 30, 2014 Surplus Contract	Sep. 30, 2013 Surplus Contract	Sep. 30, 2014 Surplus Contract Revenue U.S. Department of Defense	Sep. 30, 2013 Surplus Contract Revenue U.S. Department of Defense	Sep. 30, 2012 Surplus Contract Revenue U.S. Department of Defense	Sep. 30, 2014 Surplus Contract Rolling stock Surplus contract revenue U.S. Department of Defense Minimum	Sep. 30, 2014 Surplus Contract Rolling stock Surplus contract revenue U.S. Department of Defense Maximum	Apr. 02, 2014 Sale of surplus assets of U.S. Department of Defense contract	Apr. 02, 2014 Non-rolling stock surplus contract Option	Sep. 30, 2014 Non-rolling stock surplus contract Expected	Apr. 02, 2014 Non-rolling stock surplus contract Expected	Jun. 30, 2012 Scrap Contract Option	Sep. 30, 2014 Scrap Contract period Option	Sep. 30, 2013 Scrap Contract	Sep. 30, 2012 Scrap Contract	Sep. 30, 2014 Scrap Contract Maximum	Sep. 30, 2014 Scrap Contract Revenue U.S. Department of Defense	Sep. 30, 2013 Scrap Contract Revenue U.S. Department of Defense	Sep. 30, 2012 Scrap Contract Revenue U.S. Department of Defense
Significant Contracts
Number of renewal options					2									4			3
Term of renewal options					1 year									1 year			1 year
Base term of follow-on contract extension				10 months
Number of renewal options under follow-on contract				2
Term of each renewal option under follow-on contract				1 month
Number of renewal options exercised																		3
Usable surplus property to be purchased as a fixed percentage of DoD's original acquisition value						1.80%									4.35%	4.35%
Term of contract														2 years
Profits from resale of the property retained (as a percent)						100.00%
Concentration risk (as a percent)								26.80%	27.70%	27.20%	30.00%	35.00%										14.40%	13.50%	16.10%
Liability for inventory included in accrued expenses and other current liabilities	$ 44,484,000	$ 34,825,000				$ 19,545,000	$ 9,257,000
Number of surplus contracts on which bidding was held													2
Profits distributed to DLA Disposition Services (as a percent)																		77.00%
Additional profit sharing distribution (as a percent)																					2.00%
Performance incentive measurement period																		12 months
Amount of performance incentive earned																		1,326,000	1,265,000	1,651,000
Profit-sharing distributions	35,055,000	35,944,000	43,242,000															34,935,000	35,944,000	43,242,000
Profit-sharing distributions accrued	$ 4,740,000	$ 4,315,000																$ 4,740,000	$ 4,315,000	$ 4,041,000
Number of consecutive quarterly periods in which performance ratio does not exceed benchmark ratios resulting in contract termination																		2
Number of preceding months in which performance ratio does not exceed benchmark ratios resulting in contract termination																		12 months