Warranties (Tables)

6 Months Ended

Jul. 31, 2013

Product Warranties Disclosures [Abstract]

Warranties

Changes in the warranty accrual were as follows:

	Three Months Ended						Six Months Ended
	July 31, 2013			July 31, 2012			July 31, 2013			July 31, 2012
Beginning balance	$	1,990		$	1,792		$	1,888		$	1,699
Accrual for warranties	868			778			1,732			1,598
Settlements made (in cash or in kind)	(811		)	(621		)	(1,573		)	(1,348		)
Ending balance	$	2,047		$	1,949		$	2,047		$	1,949