Note 11 - Earnings Per Share (Detail) - Basic and Diluted Earnings Per Share Under the Two-Class Method (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
Net income attributable to shareholders	$ 25,845	$ 28,693	$ 61,513	$ 110,171
Less: Distributed and undistributed income allocated to participating securities	(371)	(522)	(891)	(2,015)
Distributed and undistributed income available to shareholders	25,474	28,171	60,622	108,156
Basic weighted average shares outstanding (in Shares)	39,386	39,660	39,335	39,497
Effect of dilutive stock options and non-participating securities	$ 430	$ 535	$ 456	$ 468
Diluted weighted average shares outstanding (in Shares)	39,816	40,195	39,791	39,965
Diluted earnings per share (in Dollars per share)	$ 0.64	$ 0.70	$ 1.52	$ 2.71
Basic earnings per share (in Dollars per share)	$ 0.65	$ 0.71	$ 1.54	$ 2.74