Benefit Plans (Tables)

3 Months Ended

Feb. 29, 2012

Benefit Plans [Abstract]

Net periodic pension cost

	U.S. Pension Plan Three Months Ended						German Pension Plan Three Months Ended
	February 29, 2012			February 28, 2011			February 29, 2012
Components of Net Periodic Pension Cost
Service cost	$	44		$	50		$	9
Interest cost on projected benefit obligation		584			590			267
Expected return on plan assets		(616	)		(647	)		—
Net amortization		317			216			—
Net periodic pension cost	$	329		$	209		$	276