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Net Income Per Common Share (Narrative) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	0 Months Ended		3 Months Ended		9 Months Ended
	Mar. 05, 2012	Jun. 07, 2011	Apr. 30, 2012	Apr. 30, 2011	Apr. 30, 2012	Apr. 30, 2011	Jun. 25, 2012
Anti-dilutive securities			42,000	1,000	24,000	54,000
Percent increase of common stock cash dividend declared	25.00%
Cash dividends paid per share			$ 0.1875		$ 0.4875
Cash dividends paid on common stock			$ 6,800		$ 17,559
Cash dividends declared per share	$ 0.75	$ 0.60	$ 0.1875		$ 0.4875
Quarterly cash dividend payable per share							$ 0.1875
Parent Company [Member]
Cash dividends paid on common stock					$ 17,559

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