Fair Value Measurements (Tables)

6 Months Ended

Aug. 31, 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 August 31, 2017
(In thousands)	Level 1			Level 2			Total
Assets:
Money market securities	$	346,842		$	—		$	346,842
Mutual fund investments	18,496			—			18,496
Derivative instruments	—			233			233
Total assets at fair value	$	365,338		$	233		$	365,571
Percent of total assets at fair value	99.9		%	0.1		%	100.0		%
Percent of total assets	2.2		%	—		%	2.2		%
Liabilities:
Derivative instruments	$	—		$	(4,388	)	$	(4,388	)
Total liabilities at fair value	$	—		$	(4,388	)	$	(4,388	)
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 August 31, 2017		As of February 28, 2017
Carrying value	$	500,000	$	500,000
Fair value	$	519,348	$	499,518