SHORT-TERM INVESTMENTS (Tables)

3 Months Ended

Jun. 30, 2018

Investments, Debt and Equity Securities [Abstract]

Schedule of short-term investments

Our short-term investments consisted of the following:

	June 30, 2018
			Gross Unrealized
	Cost or Amortized Cost		Gains		Losses			Fair Value
Short-term investments
Bank time deposits	$	246,503	$	—	$	—		$	246,503
Available-for-sale securities:
Corporate bonds	321,860		28		(1,245		)	320,643
US Treasuries	60,044		—		(245		)	59,799
Commercial paper	5,990		—		—			5,990
Mutual funds	4,558		7		(44		)	4,521
Total short-term investments	$	638,955	$	35	$	(1,534	)	$	637,456

	March 31, 2018
			Gross Unrealized
	Cost or Amortized Cost		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

Summary of the contracted maturities of short-term investments

The following table summarizes the contracted maturities of our short-term investments at June 30, 2018:

	June 30, 2018
	Amortized Cost		Fair Value
Short-term investments
Due in 1 year or less	$	555,536	$	554,449
Due in 1 - 2 years	83,419		83,007
Total short-term investments	$	638,955	$	637,456