Share-based Compensation (Narrative) (Details) (USD $)	3 Months Ended
	Dec. 31, 2012 Y
Share-based Compensation 1	800,000
Share-based Compensation 2	1,600,000
Share-based Compensation 3	400,000
Share-based Compensation 4	$ 31.25
Share-based Compensation 5	6
Share-based Compensation 6	40,000
Share-based Compensation 7	280,000
Share-based Compensation 8	300,300
Share-based Compensation 9	$ 16.45
Share-based Compensation 10	$ 1.59
Share-based Compensation 11	$ 10.75
Share-based Compensation 12	72,000
Share-based Compensation 13	$ 21.5
Share-based Compensation 14	5
Share-based Compensation 15	1.59
Share-based Compensation 16	$ 17.95
Share-based Compensation 17	216,000
Share-based Compensation 18	34,000
Share-based Compensation 19	$ 20.9
Share-based Compensation 20	5
Share-based Compensation 21	1.59
Share-based Compensation 22	$ 11.80
Share-based Compensation 23	6,308
Share-based Compensation 24	0
Share-based Compensation 25	385,640
Share-based Compensation 26	$ 14.05
Share-based Compensation 27	7
Share-based Compensation 28	1.59
Share-based Compensation 29	$ 12.30
Share-based Compensation 30	159,014
Share-based Compensation 31	86,582
Share-based Compensation 32	237,773
Share-based Compensation 33	1.75
Share-based Compensation 34	15,000
Share-based Compensation 35	$ 16.20
Share-based Compensation 36	7
Share-based Compensation 37	1.59
Share-based Compensation 38	$ 14.30
Share-based Compensation 39	8,709
Share-based Compensation 40	0
Share-based Compensation 41	20,000
Share-based Compensation 42	$ 12.15
Share-based Compensation 43	7.5
Share-based Compensation 44	1.59
Share-based Compensation 45	$ 7.05
Share-based Compensation 46	10,516
Share-based Compensation 47	4,510
Share-based Compensation 48	4,193
Share-based Compensation 49	0.5
Share-based Compensation 50	100,000
Share-based Compensation 51	$ 14.05
Share-based Compensation 52	54,074
Share-based Compensation 53	29,954
Share-based Compensation 54	$ 84,742
Share-based Compensation 55	1.75