Stock Repurchase Programs (Details) (USD $) |
1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | ||||
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May 31, 2011 |
Sep. 30, 2011 |
Sep. 30, 2010 |
Sep. 30, 2009 |
Nov. 30, 2011
2008 and 2010 Plan
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Sep. 30, 2011
2008 and 2010 Plan
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Sep. 30, 2010
2008 and 2010 Plan
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Sep. 30, 2009
2008 and 2010 Plan
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Nov. 30, 2011
2011 Plan
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| Stock Repurchase Programs | |||||||||
| Authorized stock split declared and distributed, number of shares per each share held | 2 | ||||||||
| Stock repurchase programs, authorized amount | $ 175,000,000 | $ 125,000,000 | |||||||
| Common shares repurchased (in shares) | 236,700 | 1,597,458 | 1,501,528 | 1,855,380 | |||||
| Common shares repurchased, cost | 57,484,000 | 40,217,000 | 30,046,000 | 8,800,000 | 57,484,000 | 40,217,000 | 30,046,000 | ||
| Amount remained available for future stock repurchases | $ 77,800,000 | ||||||||
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
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- Definition This item represents the conversion ratio used in the calculation of a stock split. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount authorized by an entity's Board of Directors under a stock repurchase plan.
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- Definition The remaining repurchase amount authorized by an entity's Board of Directors under a stock repurchase plan.
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- Definition Number of shares that have been repurchased during the period and are being held in treasury. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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