Basis of Presentation (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Business Acquisition [Line Items]
cash proceeds sale of subsidiary			$ 77,060
Less: Net value of assets and liabilities sold or transferred as of April 15, 2011			(12,558)
Gain (Loss) on Sale of Assets and Asset Impairment Charges			64,502
Discontinued Operation, Tax Effect of Income (Loss) from Disposal of Discontinued Operation			(25,013)
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax			39,489
ConferencePlus [Member]
Business Acquisition [Line Items]
cash proceeds sale of subsidiary			40,331
Less: Net value of assets and liabilities sold or transferred as of April 15, 2011			(7,483)
Gain (Loss) on Sale of Assets and Asset Impairment Charges			32,848
Discontinued Operation, Tax Effect of Income (Loss) from Disposal of Discontinued Operation			(12,359)
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax			20,489
CNS [Member]
Business Acquisition [Line Items]
cash proceeds sale of subsidiary			36,729
Less: Net value of assets and liabilities sold or transferred as of April 15, 2011			(5,075)
Gain (Loss) on Sale of Assets and Asset Impairment Charges			31,654
Discontinued Operation, Tax Effect of Income (Loss) from Disposal of Discontinued Operation			(12,654)
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax			$ 19,000