Stockholders' Equity (Tables)

12 Months Ended

Sep. 30, 2011

Stockholders' Equity

Summary Of Restricted Common Stock

	Number of Shares			Weighted- Average Grant Date Fair Value
Nonvested at October 1, 2008		6,634,493		$	10.47
Granted		2,387,997			9.18
Vested		(3,452,430	)		10.41
Forfeited		(324,472	)		10.65
Nonvested at September 30, 2009		5,245,588			9.90
Granted		4,342,768			12.17
Vested		(3,128,145	)		10.16
Forfeited		(252,611	)		11.14
Nonvested at September 30, 2010		6,207,600			11.32
Granted		3,609,550			23.41
Vested		(3,575,850	)		11.62
Forfeited		(282,742	)		15.48
Nonvested at September 30, 2011		5,958,558		$	18.26

Summary Of Stock Options

	Number of Options			Weighted- Average Exercise Price
Outstanding at October 1, 2008		814,951		$	15.00
Exercised		(172,396	)		5.36
Forfeited		(58,900	)		23.32
Outstanding at September 30, 2009		583,655			16.95
Exercised		(34,566	)		9.56
Forfeited		(24,459	)		140.40
Outstanding at September 30, 2010		524,630			11.61
Exercised		(147,823	)		13.01
Forfeited		(15,769	)		49.81
Outstanding at September 30, 2011		361,038			9.14
Exercisable at September 30, 2011		361,038		$	9.14

Components Of Accumulated Other Comprehensive Loss

	September 30, 2011			September 30, 2010
Foreign currency translation adjustments	$	(1,167	)	$	350
Unrealized loss on securities, net		(2,229	)		(2,229	)
Accumulated other comprehensive loss	$	(3,396	)	$	(1,879	)