Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Earnings Per Share [Abstract]
Earnings from continuing operations	$ 29,982	$ 21,169	$ 31,594	$ 21,627	$ 33,275	$ 31,176	$ 41,097	$ 26,062	$ 104,372	$ 131,610	$ 105,634
Basic average shares outstanding									44,825,000	45,497,000	45,289,000
Dilutive effect of stock options and equivalents									275,000	335,000	255,000
Diluted average shares outstanding									45,100,000	45,832,000	45,544,000
Earnings per share from continuing operations
Basic (in usd per share)	$ 0.67	$ 0.47	$ 0.70	$ 0.48	$ 0.73	$ 0.69	$ 0.90	$ 0.58	$ 2.33	$ 2.89	$ 2.34
Diluted (in usd per share)	$ 0.67	$ 0.47	$ 0.70	$ 0.48	$ 0.73	$ 0.68	$ 0.89	$ 0.57	$ 2.31	$ 2.87	$ 2.32
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities, shares									4,239,000	3,883,300	4,471,400
Antidilutive securities, weighted average exercise price									$ 42.66	$ 36.52	$ 42.98