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Summary of Significant Accounting Policies (Goodwill) (Details) (USD $)	Sep. 30, 2012	Jun. 30, 2012 industry	Sep. 30, 2011	Jun. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Goodwill [Line Items]
Market capitalization	$ 263,300,000	$ 264,300,000
Carrying value	$ 270,857,000	$ 265,700,000	$ 260,716,000		$ 240,556,000	$ 229,586,000
Control premium percent	40.00%	40.00%
Percent fair value in excess of carrying value of goodwill	36.00%	39.00%		28.60%
Number of industries encompasses similar products		3
Minimum [Member]
Goodwill [Line Items]
Control premium percent		30.00%
Target company's equity benchmark		50.00%
Maximum [Member]
Goodwill [Line Items]
Control premium percent		45.00%

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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