Fair Value Measurements (Tables)

3 Months Ended

May 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 May 31, 2017
(In thousands)	Level 1			Level 2			Total
Assets:
Money market securities	$	410,764		$	—		$	410,764
Mutual fund investments	17,813			—			17,813
Derivative instruments	—			577			577
Total assets at fair value	$	428,577		$	577		$	429,154
Percent of total assets at fair value	99.9		%	0.1		%	100.0		%
Percent of total assets	2.6		%	—		%	2.6		%
Liabilities:
Derivative instruments	$	—		$	(3,739	)	$	(3,739	)
Total liabilities at fair value	$	—		$	(3,739	)	$	(3,739	)
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 May 31, 2017		As of February 28, 2017
Carrying value	$	500,000	$	500,000
Fair value	$	509,255	$	499,518