Share-based Compensation (Narrative) (Details) (USD $)	3 Months Ended
	Dec. 31, 2012 Y
Share-based Compensation 2	800,000
Share-based Compensation 3	1,600,000
Share-based Compensation 4	400,000
Share-based Compensation 5	$ 31.25
Share-based Compensation 6	6
Share-based Compensation 7	40,000
Share-based Compensation 8	280,000
Share-based Compensation 9	300,300
Share-based Compensation 10	$ 16.45
Share-based Compensation 11	$ 1.59
Share-based Compensation 12	$ 10.75
Share-based Compensation 13	72,000
Share-based Compensation 14	$ 21.5
Share-based Compensation 15	5
Share-based Compensation 16	1.59
Share-based Compensation 17	$ 17.95
Share-based Compensation 18	216,000
Share-based Compensation 19	34,000
Share-based Compensation 20	$ 20.9
Share-based Compensation 21	5
Share-based Compensation 22	1.59
Share-based Compensation 23	$ 11.80
Share-based Compensation 24	6,308
Share-based Compensation 25	0
Share-based Compensation 26	385,640
Share-based Compensation 27	$ 14.05
Share-based Compensation 28	7
Share-based Compensation 29	1.59
Share-based Compensation 30	$ 12.30
Share-based Compensation 31	159,014
Share-based Compensation 32	86,582
Share-based Compensation 33	237,773
Share-based Compensation 34	1.75
Share-based Compensation 35	15,000
Share-based Compensation 36	$ 16.20
Share-based Compensation 37	7
Share-based Compensation 38	1.59
Share-based Compensation 39	$ 14.30
Share-based Compensation 40	8,709
Share-based Compensation 41	0
Share-based Compensation 42	20,000
Share-based Compensation 43	$ 12.15
Share-based Compensation 44	7.5
Share-based Compensation 45	1.59
Share-based Compensation 46	$ 7.05
Share-based Compensation 47	10,516
Share-based Compensation 48	4,510
Share-based Compensation 49	4,193
Share-based Compensation 50	0.5
Share-based Compensation 51	100,000
Share-based Compensation 52	$ 14.05
Share-based Compensation 53	54,074
Share-based Compensation 54	29,954
Share-based Compensation 55	$ 84,742
Share-based Compensation 56	1.75