Fair Value Measurements (Tables)

9 Months Ended

Nov. 30, 2017

Fair Value Disclosures [Abstract]

Schedule Of Items Measured At Fair Value On A Recurring Basis

Items Measured at Fair Value on a Recurring Basis

	As of November 30, 2017
(In thousands)	Level 1			Level 2			Total
Assets:
Money market securities	$	302,456		$	—		$	302,456
Mutual fund investments	19,311			—			19,311
Derivative instruments	—			6,904			6,904
Total assets at fair value	$	321,767		$	6,904		$	328,671
Percent of total assets at fair value	97.9		%	2.1		%	100.0		%
Percent of total assets	1.9		%	—		%	1.9		%
Liabilities:
Derivative instruments	$	—		$	—		$	—
Total liabilities at fair value	$	—		$	—		$	—
Percent of total liabilities	—		%	—		%	—		%

	As of February 28, 2017
(In thousands)	Level 1			Level 2			Total
Assets:
Money market securities	$	397,994		$	—		$	397,994
Mutual fund investments	16,519			—			16,519
Derivative instruments	—			2,997			2,997
Total assets at fair value	$	414,513		$	2,997		$	417,510
Percent of total assets at fair value	99.3		%	0.7		%	100.0		%
Percent of total assets	2.5		%	—		%	2.6		%
Liabilities:
Derivative instruments	$	—		$	(509	)	$	(509	)
Total liabilities at fair value	$	—		$	(509	)	$	(509	)
Percent of total liabilities	—		%	—		%	—		%

Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]

(In thousands)	As of November 30, 2017		As of February 28, 2017
Carrying value	$	500,000	$	500,000
Fair value	$	507,348	$	499,518