Income Taxes (Reconciliation Of Unrecognized Tax Benefits) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Aug. 31, 2012	Aug. 31, 2011
Income Taxes [Abstract]
Balance at beginning of year	$ 4,775	$ 5,628
Additions based on tax positions related to the current year	834
Additions for tax positions of prior years	1,670	672
Reductions for tax positions of prior years	(469)
Reductions for settlements	(68)	(1,104)
Reductions due to statute expiration	(1,291)	(421)
Balance at end of year	$ 5,451	$ 4,775

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The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date.

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The gross amount of decreases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns.

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The gross amount of decreases in unrecognized tax benefits resulting from settlements with taxing authorities.

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The gross amount of increases in unrecognized tax benefits resulting from tax positions that have been or will be taken in the tax return for the current period, excluding amounts pertaining to examined tax returns.

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The gross amount of increases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns.

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The gross amount of decreases in unrecognized tax benefits resulting from lapses of the applicable statutes of limitations.

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