CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 188,688	$ 223,043
Restricted cash	122	50
Short-term investments	129,087	36
Accounts receivable, net	73,397	89,038
Prepaid expenses and other current assets	11,836	12,689
Deferred tax assets, net	19,113	26,616
Assets held-for-sale	0	10,571
Total current assets	422,243	362,043
Property and equipment, net	93,153	96,751
Capitalized software development costs, net	9,389	10,360
Deposits and other assets	7,136	5,120
Deferred tax assets, net	4,196	3,664
Total assets	536,117	477,938
Current liabilities:
Accounts payable and accrued expenses	42,386	40,905
Accrued compensation and employee benefits	58,310	71,789
Deferred revenue and advance payments	108,155	101,249
Deferred tax liabilities	376	523
Liabilities held-for-sale	0	4,689
Total current liabilities	209,227	219,155
Deferred revenue and advance payments	9,454	8,823
Other long-term liabilities	42,022	43,418
Deferred tax liabilities	1,958	6,231
Total liabilities	262,661	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	492,009	468,087
Treasury stock, at cost; 6,405 shares	(475,184)	(475,184)
Accumulated other comprehensive loss	(2,330)	(1,515)
Retained earnings	258,944	208,906
Total stockholders' equity	273,456	200,311
Total liabilities and stockholders' equity	536,117	477,938
Class A
Stockholders' Equity
Common stock	15	15
Class B Convertible
Stockholders' Equity
Common stock	$ 2	$ 2