Accrued Liabilities (Details) - USD ($)	Jun. 30, 2018	Mar. 31, 2018
Accrued liabilities
Customer deposits	$ 23,774,000	$ 21,294,000
Salaries, wages and benefits	20,055,000	24,416,000
Unearned insurance premiums	18,216,000	17,432,000
Estimated warranties	16,670,000	16,638,000
Accrued volume rebates	9,044,000	7,778,000
Insurance loss reserves	6,472,000	6,157,000
Company repurchase option on certain loans sold	5,264,000	5,637,000
Accrued insurance	4,543,000	5,320,000
Accrued taxes	2,368,000	1,986,000
Reserve for repurchase commitments	2,315,000	2,207,000
Capital lease obligation	1,136,000	1,155,000
Other	16,917,000	16,480,000
Total accrued liabilities	$ 126,774,000	$ 126,500,000