SHORT-TERM AND LONG-TERM INVESTMENTS

3 Months Ended

Jan. 31, 2016

Investments, Debt and Equity Securities [Abstract]

SHORT-TERM AND LONG-TERM INVESTMENTS

SHORT-TERM AND LONG-TERM INVESTMENTS

As of the dates indicated, investments are comprised of the following (in thousands):

	January 31, 2016
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
U.S. government obligations:
Included in short-term investments	$	180,087	$	30	(83		)	$	180,034
Included in long-term investments	125,041		117		(98		)	125,060
	$	305,128	$	147	$	(181	)	$	305,094
Commercial paper:
Included in short-term investments	$	29,976	—		—			$	29,976
	$	29,976	$	—	$	—		$	29,976

	October 31, 2015
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
U.S. government obligations:
Included in short-term investments	$	110,108	$	10	$	—		$	110,118
Included in long-term investments	95,171		—		(66		)	95,105
	$	205,279	$	10	$	(66	)	$	205,223
Commercial paper:
Included in short-term investments	24,989		—		—			24,989
	$	24,989	$	—	$	—		$	24,989

The following table summarizes the final legal maturities of debt investments at January 31, 2016 (in thousands):

	Amortized Cost		Estimated Fair Value
Less than one year	$	210,063	$	210,010
Due in 1-2 years	125,041		125,060
	$	335,104	$	335,070