Schedule II - Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2012		Mar. 31, 2011		Mar. 31, 2010
Movement in Valuation Allowances and Reserves [Roll Forward]
Charged to Costs and Expenses	$ 221		$ 3,086		$ 447
Allowance for doubtful accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	3,732		3,906		8,484
Charged to Costs and Expenses	221		3,086		447
Charged to Other Accounts ‑Describe	0		0		0
Deductions -Describe	75	[1]	3,260	[1]	5,025	[1],[2]
Balance at End of Period	3,878		3,732		3,906
Subsidiaries [Member] | Allowance for doubtful accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Deductions -Describe					$ 4,585	[1],[2]

[1] Currency translation and direct write off.

[2] Subsidiary sold - $4,585.