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Quarterly Results (Narrative) (Details) (USD $) | 3 Months Ended
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Dec. 31, 2011 | Dec. 31, 2010 | Sep. 30, 2010 | Jun. 30, 2010
Quarterly Results [Abstract] |  |  |  |
Favorable pre-tax reduction | $ 10,400,000 | $ 32,600,000 |  | $ 16,400,000
Tax reduction per diluted share | $ 0.07 | $ 0.18 |  | $ 0.10
Favorable after-tax reduction | 6,400,000 | 17,900,000 |  | 10,200,000
Pre-tax transaction cost |  | 31,100,000 | 3,900,000 | 18,200,000
Transaction cost per share |  | $ 0.25 | $ 0.02 | $ 0.11
After tax transaction cost |  | 24,900,000 | 2,400,000 | 11,300,000
Favorable discrete tax |  |  | 4,300,000 |
Discrete tax per share |  |  | $ 0.04 |
Unfavorable pre-tax charge to write-off costs related to acute care hospital construction project |  | 6,700,000 |  |
Charge to write-off costs related to acute care hospital construction project diluted per share |  | $ 4.00 |  |
Unfavorable after tax charge to write-off costs related to acute care hospital construction project |  | 4,100,000 |  |
Unfavorable charge recorded for split-dollar life insurance agreements |  | 9,200,000 |  |
Unfavorable charge recorded for split-dollar life insurance agreements diluted per share |  | $ 0.09 |  |

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