| Year Ended March 31, | ||||||
| 2013 | 2012 | 2011 | ||||
| Accrued general and product liability, beginning of year | $ | 20,536 | $ | 20,576 | $ | 23,054 |
| Add provision for claims | 2,185 | 4,151 | 6,447 | |||
| Deduct payments for claims | (5,602) | (4,191) | (8,925) | |||
| Accrued general and product liability, end of year | $ | 17,119 | $ | 20,536 | $ | 20,576 |