Fair Value Measurements (Tables)

9 Months Ended

Dec. 31, 2016

Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]

Schedule of fair value, assets and liabilities measured on recurring basis

Assets measured at fair value on a recurring basis at December 31, 2016 are as follows (amounts in thousands):

	Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Total Balance
Assets
Cash and cash equivalents:
Money market mutual funds	$	61,923	$	—	$	61,923
Deposit accounts	—		602,015		602,015
Short-term investments:
Marketable equity securities	707		—		707
Corporate bonds and debt	—		4,998		4,998
Long-term investments:
Corporate bonds and debt	—		10,095		10,095
Government agency bonds	—		19,912		19,912
Total assets measured at fair value	$	62,630	$	637,020	$	699,650

Assets measured at fair value on a recurring basis at March 31, 2016 are as follows (amounts in thousands):

	Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Total Balance
Assets
Cash and cash equivalents:
Money market mutual funds	$	1,787,446	$	—	$	1,787,446
Deposit accounts	—		305,305		305,305
Short-term investments:
Marketable equity securities	2,203		—		2,203
Corporate bonds and debt	—		1,000		1,000
Government agency bonds	—		350,081		350,081
Long-term investments:
Government agency bonds	—		118,549		118,549
Total assets measured at fair value	$	1,789,649	$	774,935	$	2,564,584