Benefit Plans (Tables)

9 Months Ended

Aug. 31, 2011

Benefit Plans [Abstract]

Net periodic pension cost

							Nine Months			Eight Months
	Three Months Ended						Ended			Ended
	August 31,			August 31,			August 31,			August 31,
	2011			2010			2011			2010
Net pension cost included the following components:
Service cost (1)	$	44		$	50		$	131		$	134
Interest cost on projected benefit obligation		591			603			1,774			1,630
Expected return on plan assets		(644	)		(644	)		(1,933	)		(1,738	)
Net loss amortization		223			171			671			464
Net periodic pension cost	$	214		$	180		$	643		$	490

(1) Service cost relates to administrative expenses incurred during the periods.