SHORT-TERM INVESTMENTS

12 Months Ended

Mar. 31, 2018

Investments, Debt and Equity Securities [Abstract]

SHORT TERM INVESTMENTS

SHORT-TERM INVESTMENTS

Our short-term investments consisted of the following as of March 31, 2018:

	March 31, 2018
	Cost or Amortized Cost		Gross Unrealized
			Gains		Losses			Fair Value
Short-term investments
Bank time deposits	$	216,663	$	—	$	—		$	216,663
Available-for-sale securities:
Corporate bonds	310,387		16		(1,687		)	308,716
US Treasuries	59,970		—		(245		)	59,725
Commercial paper	25,422		—		—			25,422
Mutual funds	4,876		16		(12		)	4,880
Total short-term investments	$	617,318	$	32	$	(1,944	)	$	615,406

	March 31, 2017
	Cost or Amortized Cost		Gross Unrealized
			Gains		Losses			Fair Value
Short-term investments
Bank time deposits	$	175,745	$	—	$	—		$	175,745
Available-for-sale securities:
Corporate bonds	243,140		98		(219		)	243,019
Commercial paper	25,938		5		(7		)	25,936
Mutual funds	4,118		123		(9		)	4,232
Total short-term investments	$	448,941	$	226	$	(235	)	$	448,932

Based on our evaluation of impairment for these investments, we did not consider any of these investments to be other-than-temporarily impaired as of March 31, 2018 or 2017. We do not intend to sell any of our investments with unrealized losses, nor is it more likely than not that we will be required to sell those investments.

The following table summarizes the contracted maturities of our short-term investments at March 31, 2018:

	March 31, 2018
	Amortized Cost		Fair Value
Short-term investments
Due in 1 year or less	$	509,981	$	508,853
Due in 1-2 years	107,337		106,553
Total short-term investments	$	617,318	$	615,406