CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 330,195	$ 223,043
Restricted cash and short-term investments	200	86
Accounts receivable, net	69,486	89,038
Prepaid expenses and other current assets	12,013	12,689
Deferred tax assets, net	19,510	26,616
Assets held-for-sale	0	10,571
Total current assets	431,404	362,043
Property and equipment, net	96,694	96,751
Capitalized software development costs, net	9,007	10,360
Deposits and other assets	4,945	5,120
Deferred tax assets, net	4,079	3,664
Total assets	546,129	477,938
Current liabilities:
Accounts payable and accrued expenses	45,582	40,905
Accrued compensation and employee benefits	51,546	71,789
Deferred revenue and advance payments	118,918	101,249
Deferred tax liabilities	578	523
Liabilities held-for-sale	0	4,689
Total current liabilities	216,624	219,155
Deferred revenue and advance payments	9,183	8,823
Other long-term liabilities	41,631	43,418
Deferred tax liabilities	3,858	6,231
Total liabilities	271,296	277,627
Commitments and Contingencies
Stockholders' Equity
Preferred stock undesignated, $0.001 par value; 5,000 shares authorized; no shares issued or outstanding	0	0
Additional paid-in capital	492,005	468,087
Treasury stock, at cost; 6,405 shares	(475,184)	(475,184)
Accumulated other comprehensive loss	(2,502)	(1,515)
Retained earnings	260,497	208,906
Total stockholders' equity	274,833	200,311
Total liabilities and stockholders' equity	546,129	477,938
Class A
Stockholders' Equity
Common stock	15	15
Class B Convertible
Stockholders' Equity
Common stock	$ 2	$ 2