Warranties (Tables)

9 Months Ended

Oct. 31, 2012

Product Warranty Costs [Abstract]

Warranties

Changes in the warranty accrual were as follows:

	Three Months Ended						Nine Months Ended
	October 31, 2012			October 31, 2011			October 31, 2012			October 31, 2011
Beginning balance	$	1,949		$	1,642		$	1,699		$	1,437
Accrual for warranties	628			763			2,226			2,352
Settlements made (in cash or in kind)	(698		)	(1,066		)	(2,046		)	(2,450		)
Ending balance	$	1,879		$	1,339		$	1,879		$	1,339