Equity (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	3 Months Ended		9 Months Ended
	Oct. 31, 2014	Feb. 28, 2015	Mar. 01, 2014	Feb. 28, 2015		Mar. 01, 2014
Schedule of Stockholders Equity [Line Items]
Balance				$ 594,745
Dividends				(38,402)	[1]
Other comprehensive income, net of tax		(25)	60	(70)		199
Distribution to noncontrolling interest partners				(941)
Proceeds from stock option exercise				60
Restricted stock compensation expense				1,529
Net income		50,959	42,956	116,005		78,101
Balance		672,926		672,926
Percentage of net income used to compute accrued dividends				33.33%
Stock split ratio	2			2
Treasury Stock [Member]
Schedule of Stockholders Equity [Line Items]
Balance				(20,453)
2-for-1 stock split effected in the form of a dividend				(133)
Grant of restricted stock, net of forfeitures				68
Proceeds from stock option exercise				16
Balance		(20,502)		(20,502)
Paid In Capital [Member]
Schedule of Stockholders Equity [Line Items]
Balance				40,476
2-for-1 stock split effected in the form of a dividend				132
Grant of restricted stock, net of forfeitures				(68)
Proceeds from stock option exercise				44
Restricted stock compensation expense				1,529
Balance		42,113		42,113
Accumulated Other Comprehensive Loss [Member]
Schedule of Stockholders Equity [Line Items]
Balance				561
Other comprehensive income, net of tax				(70)
Balance		491		491
Retained Earnings [Member]
Schedule of Stockholders Equity [Line Items]
Balance				572,874
Dividends				(38,402)	[1]
2-for-1 stock split effected in the form of a dividend				(375)
Net income				115,140
Balance		649,237		649,237
Noncontrolling Interests [Member]
Schedule of Stockholders Equity [Line Items]
Balance				912
Distribution to noncontrolling interest partners				(941)
Net income				865
Balance		836		836
Common Stock [Member]
Schedule of Stockholders Equity [Line Items]
Balance				351
2-for-1 stock split effected in the form of a dividend				352
Balance		703		703
Class A Common Stock [Member]
Schedule of Stockholders Equity [Line Items]
Balance				24
2-for-1 stock split effected in the form of a dividend				24
Balance		$ 48		$ 48

[1] Dividends are calculated as 1/3 of net income after prior period loss (includes adjustment for actual dividends paid based on accrual from previous period).