Schedule of Capital and Operating Leases (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Leases Disclosure [Line Items]
2014, Capital Leases	$ 330
2015, Capital Leases	130
2016, Capital Leases	48
2017, Capital Leases	27
2018, Capital Leases	14
Thereafter, Capital Leases
Total minimum Lease payments, Capital Leases	549
Amounts representing interest	34
Net minimum lease payments, including current portion of $311	515
2014, Operating Leases	19,433
2015, Operating Leases	14,129
2016, Operating Leases	10,312
2017, Operating Leases	6,793
2018, Operating Leases	4,714
Thereafter, Operating Leases	8,606
Total minimum lease payments, Operating Leases	$ 63,987

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