CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 98,922	$ 170,132
Short-term investments	125,001	105,001
Accounts receivable, net	59,988	73,113
Deferred income taxes	433	412
Prepaid expenses and other	6,583	6,295
Total current assets	290,927	354,953
Property and equipment, net	27,672	27,998
Deferred income taxes, net of current portion	2,152	2,035
Goodwill and intangibles, net	15,443	6,334
Other assets, net	8,177	8,626
Total assets	344,371	399,946
Current liabilities:
Accounts payable	2,765	3,610
Accrued taxes	684	1,134
Accrued compensation and benefits	19,238	19,610
Deferred revenue	6,109	5,905
Accrued liabilities and other	11,884	9,509
Total current liabilities	40,680	39,768
Convertible notes, net	118,958	113,915
Other long-term liabilities	4,892	5,566
Total liabilities	164,530	159,249
Commitments and contingencies (Note 10)
Stockholders’ equity:
Common stock; $0.0001 par value; 1,000,000 shares authorized; 83,519 shares issued and 83,398 shares outstanding as of September 30, 2014; 82,086 shares issued and 81,965 shares outstanding as of December 31, 2013	8	8
Treasury stock	(441)	(441)
Additional paid-in capital	307,178	286,526
Accumulated deficit	(127,868)	(46,250)
Accumulated other comprehensive income	964	854
Total stockholders’ equity	179,841	240,697
Total liabilities and stockholders’ equity	$ 344,371	$ 399,946