Share-Based Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Sep. 23, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated Share-based Compensation Expense	$ 1,030	$ 8,982	$ 11,555	$ 26,863
Share-based Compensation Expense Per Share, Basic	$ 0.01	$ 0.12	$ 0.15	$ 0.35
Share-based Compensation Expense Per Share, Diluted	$ 0.01	$ 0.12	$ 0.15	$ 0.35
Exchange Offer, Number of Common Stock Shares Under Old Plan Exchanged					1,600,000
Exchange Offer, Percent of Eligible Options Exchanged					93.00%
Exchange Offer, Number of Common Stock Shares From Replacement Options					256,202
Exchange Offer, Exercise Price of Replacement Options					$ 7.09
Exchange Offer, Replacement Options, Percent of Fair Value of Original Options					50.00%
Cost of Service [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated Share-based Compensation Expense	727	852	1,930	2,315
Selling and Marketing Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated Share-based Compensation Expense	760	1,577	1,068	4,514
General and Administrative Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated Share-based Compensation Expense	$ (457)	$ 6,553	$ 8,557	$ 20,034