Summary of Pension Plan Investments Measured at Fair Value (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013		Mar. 31, 2012		Mar. 31, 2011
United States Plans
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	$ 10,334		$ 9,192		$ 8,746
United States Plans | Quoted Price in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	10,334		9,192
United States Plans | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	1,454		868
United States Plans | Cash and Cash Equivalents | Quoted Price in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	1,454		868
United States Plans | US
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	5,346	[1]	5,067	[1]
United States Plans | US | Quoted Price in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	5,346	[1]	5,067	[1]
United States Plans | International Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	905	[2]	837	[2]
United States Plans | International Equity Securities | Quoted Price in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	905	[2]	837	[2]
United States Plans | Fixed Income Funds
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	2,629	[3]	2,420	[3]
United States Plans | Fixed Income Funds | Quoted Price in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	2,629	[3]	2,420	[3]
International Plans
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	29,468		26,942		25,779
International Plans | Quoted Price in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	29,468		26,942
International Plans | US
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	2,856	[1]	2,742	[1]
International Plans | US | Quoted Price in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	2,856	[1]	2,742	[1]
International Plans | International Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	15,617	[2]	14,728	[2]
International Plans | International Equity Securities | Quoted Price in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	15,617	[2]	14,728	[2]
International Plans | Fixed Income Funds
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	10,995	[3]	9,472	[3]
International Plans | Fixed Income Funds | Quoted Price in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	$ 10,995	[3]	$ 9,472	[3]

[1] US equities include companies that are well diversified by industry sector and equity style (i.e., growth and value strategies). Active and passive management strategies are employed. Investments are primarily in large capitalization stocks and, to a lesser extent, mid- and small-cap stocks.

[2] International equities are invested in companies that are traded on exchanges outside the U.S. and are well diversified by industry sector, country and equity style. Active and passive strategies are employed. The vast majority of the investments are made in companies in developed markets with a small percentage in emerging markets.

[3] Fixed income consists primarily of investment grade bonds from diversified industries.