Quarterly Results (Narrative) (Details) (USD $)	3 Months Ended
	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