Accrued Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Mar. 31, 2012
Accrued liabilities
Customer deposits	$ 10,820	$ 9,740
Salaries, wages and benefits	10,529	10,466
Estimated warranties	8,782	9,456
Unearned insurance premiums	7,352	6,146
Deferred margin	6,120	4,399
Accrued insurance	3,168	3,701
Accrued taxes	2,939	2,860
Accrued volume rebates	1,780	1,579
Reserves related to consumer loans sold	1,096	805
Reserve for repurchase commitments	1,024	819
Insurance loss reserves	957	1,141
Other (various)	6,828	7,383
Total accrued liabilities	$ 61,395	$ 58,495