CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 47,370	$ 35,944
Short-term investments	57,038	80,231
Accounts receivable - net	43,927	36,870
Deferred tax assets	4,818	3,856
Prepaid expenses and other current assets	7,189	6,749
Total current assets	160,342	163,650
Property and equipment - net	41,289	31,899
Restricted cash	5,804	8,691
Software development costs - net	4,812	3,642
Purchased intangibles - net	11,731	12,651
Goodwill	22,450	22,450
Deferred tax assets	10,816	10,959
Investments and other assets	22,728	7,228
Total assets	279,972	261,170
Current liabilities:
Current portion of long-term debt and capital lease obligations		2,909
Accounts payable	1,348	559
Accrued compensation	18,196	19,178
Accrued expenses	11,316	10,981
Current portion of deferred revenue	5,528	4,978
Interest rate derivative liability		490
Current portion of deferred rent	896	1,497
Total current liabilities	37,284	40,592
Deferred rent, net of current portion	3,258	5,960
Deferred revenue, net of current portion	39,998	35,661
Other long-term liabilities	1,394	1,897
Debt and capital lease obligations, net of current portion		6,307
Total liabilities	81,934	90,417
Commitments and contingencies (note 10)
Stockholders' equity:
Preferred stock, $0.01 par value: 5,000 shares authorized; no shares issued and outstanding at June 30, 2011 and December 31, 2010, respectively
Common stock, $0.01 par value: 125,000 shares authorized; 36,245 shares issued, and 34,967 shares outstanding at June 30, 2011; 35,808 shares issued and 34,530 shares outstanding at December 31, 2010	362	358
Additional paid-in capital	219,153	200,339
Treasury stock, at cost, 1,278 shares	(1,200)	(1,200)
Accumulated other comprehensive income	58	28
Accumulated deficit	(20,335)	(28,772)
Total stockholders' equity	198,038	170,753
Total liabilities and stockholders' equity	$ 279,972	$ 261,170