SHORT-TERM INVESTMENTS (Tables)

6 Months Ended

Sep. 30, 2016

SHORT-TERM INVESTMENTS.

Schedule of short-term investments

	September 30, 2016
			Gross Unrealized
	Cost or Amortized Cost
			Gains		Losses			Fair Value
Short-term investments
Bank time deposits	$	198,072	$	—	$	—		$	198,072
Available-for-sale securities:
Corporate bonds		206,383		207		(71	)		206,519
Total short-term investments	$	404,455	$	207	$	(71	)	$	404,591

	March 31, 2016
			Gross Unrealized
	Cost or Amortized Cost							Fair Value
			Gains		Losses
Short-term investments
Bank time deposits	$	265,570	$	—	$	—		$	265,570
Available-for-sale securities:
Corporate bonds		205,166		131		(47	)		205,250
Total short-term investments	$	470,736	$	131	$	(47	)	$	470,820

Summary of the contracted maturities of short-term investments

	September 30, 2016
	Amortized Cost		Fair Value
Short-term investments
Due in 1 year or less	$	350,866	$	350,919
Due in 1 - 2 years		53,589		53,672
Total short-term investments	$	404,455	$	404,591