Leases Annual Commitments (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014
Schedule of Operating Leases [Line Items]
Operating leases future minimum payments due in 2015	$ 914
Operating leases future minimum payments due in 2016	140
Operating leases future minimum payments due in 2017	46
Operating leases future minimum payments due in 2018	3
Operating leases future minimum payments due Thereafter
Operating leases future minimum payments due	1,103
Affiliate
Schedule of Operating Leases [Line Items]
Operating leases future minimum payments due in 2015
Operating leases future minimum payments due in 2016
Operating leases future minimum payments due in 2017
Operating leases future minimum payments due in 2018
Operating leases future minimum payments due Thereafter
Operating leases future minimum payments due
Non-Affiliate
Schedule of Operating Leases [Line Items]
Operating leases future minimum payments due in 2015	914
Operating leases future minimum payments due in 2016	140
Operating leases future minimum payments due in 2017	46
Operating leases future minimum payments due in 2018	3
Operating leases future minimum payments due Thereafter
Operating leases future minimum payments due	$ 1,103