Pension Plan (Tables)

6 Months Ended

Aug. 31, 2012

Pension Plan [Abstract]

Summary of pension expense composed of the following components included in cost of goods sold and selling, general and administrative expenses

	Three months ended August 31,						Six months ended August 31,
	2012			2011			2012			2011
Components of net periodic benefit cost
Service cost	$	320		$	303		$	641		$	607
Interest cost		601			630			1,201			1,261
Expected return on plan assets		(802	)		(803	)		(1,604	)		(1,607	)
Amortization of:
Prior service cost		(36	)		(36	)		(72	)		(72	)
Unrecognized net loss		456			316			912			631
Net periodic benefit cost	$	539		$	410		$	1,078		$	820