Fair Value Measurements (Tables)

9 Months Ended

Dec. 31, 2015

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, 2015 are as follows (amounts in thousands):

	Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Balance
Assets
Cash and cash equivalents:
Money market mutual funds	$	29,971	$	—	$	—	$	29,971
Deposit accounts	—		301,480		—		301,480
Short-term investments:
Marketable equity securities	3,022		—		—		3,022
Corporate bonds and debt	—		481,488		—		481,488
Government agency bonds	—		187,319		—		187,319
Municipal bonds	—		4,620		—		4,620
Long-term investments:
Corporate bonds and debt	—		744,173		—		744,173
Government agency bonds	—		599,896		—		599,896
Municipal bonds	—		36,095		—		36,095
Auction rate securities	—		—		9,825		9,825
Derivative assets	—		4,693		—		4,693
Total assets measured at fair value	$	32,993	$	2,359,764	$	9,825	$	2,402,582

Assets measured at fair value on a recurring basis at March 31, 2015 are as follows (amounts in thousands):

	Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Balance
Assets
Cash and cash equivalents:
Money market mutual funds	$	279,833	$	—	$	—	$	279,833
Deposit accounts	—		327,982		—		327,982
Short-term investments:
Marketable equity securities	13,166		—		—		13,166
Corporate bonds and debt	—		756,664		—		756,664
Time deposits (1)	—		506		—		506
Government agency bonds	—		549,737		—		549,737
Municipal bonds	—		30,981		—		30,981
Long-term investments:
Corporate bonds and debt	—		164,075		6,190		170,265
Government agency bonds	—		192,519		—		192,519
Municipal bonds	—		10,717		—		10,717
Auction rate securities	—		—		9,825		9,825
Derivative assets	—		8,928		—		8,928
Total assets measured at fair value	$	292,999	$	2,042,109	$	16,015	$	2,351,123

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation

The following table presents a reconciliation for all assets measured at fair value on a recurring basis, excluding accrued interest components, using significant unobservable inputs (Level 3) for the nine months ended December 31, 2015 (amounts in thousands):

Nine months ended December 31, 2015	Auction Rate Securities		Corporate Debt			Total Losses
Balance at March 31, 2015	$	9,825	$	6,190		$	—
Total gains (losses) (realized):
Included in earnings	—		(3,995		)	(3,995		)
Transfers out of Level 3	—		(2,195		)	—
Balance at December 31, 2015	$	9,825	$	—		$	(3,995	)