Employee Retirement Plans (Tables)

3 Months Ended

Jan. 31, 2012

Employee Retirement Plans [Abstract]

Costs and payments related to supplemental retirement plans

		September 30,		September 30,
	Three months  ended January 31,
	2012		2011
Service cost	$	97	$	76
Interest cost		303		323
Amortization of prior service obligation		184		173
Amortization of unrecognized losses		17
Total costs	$	601	$	572
Benefits paid	$	115	$	34