Future Minimum Lease Payments Under All Significant Non Cancelable Operating Leases (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Schedule of Operating Leases [Line Items]
2014	$ 1,157
2015	925
2016	760
2017	32
2018	32
Thereafter	96
Total future minimum lease payments	$ 3,002