CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:
Net income	$ 23,525	$ 7,990
Adjustment to net income for discontinued operation net loss (income)	37	(88)
Net income from continuing operations	23,562	7,902
Adjustments to reconcile net income to net cash provided by operating activities from continuing operations:
Stock-based compensation	15,312	32,206
Excess tax benefit from stock-based compensation	(6,841)	(2,783)
Depreciation and amortization	10,814	12,673
Amortization of debt issuance costs	713	239
(Reduction of) provision for doubtful accounts	(6)	411
Reduction of sales reserves	(555)	(150)
Deferred income taxes	7,763	1,791
Other	182	(148)
Effect of statement of operations adjustments	27,382	44,239
Changes in operating assets and liabilities:
Accounts receivable	535	5,282
Prepaid and other assets	5,661	(4,643)
Accounts payable	3,675	3,582
Accrued liabilities	(7,282)	(3,472)
Deferred revenues	(10,219)	(8,634)
Income taxes payable		(5,190)
Effect of changes in operating assets and liabilities	(7,630)	(13,075)
Net cash provided by operating activities from continuing operations	43,314	39,066
Cash flows from investing activities:
Purchases of property and equipment	(4,370)	(1,611)
Capitalized software development costs	(963)	(1,916)
Change in restricted cash	(173)
Purchases of marketable securities		(57,863)
Sales and maturities of marketable securities		213,444
Net cash (used in) provided by investing activities from continuing operations	(5,506)	152,054
Cash flows from financing activities:
Proceeds from common stock issued from exercises of stock options	2,141	16,212
Proceeds from common stock issued under the employee stock purchase plan	3,493	3,211
Excess tax benefits from stock-based compensation	6,841	2,783
Withholding taxes related to equity award net share settlement	(5,127)	(6,509)
Proceeds from debt		225,000
Repayment of debt	(25,000)	(95,000)
Repurchase of common stock	(12,411)
Debt issuance costs		(5,725)
Net cash (used in) provided by financing activities from continuing operations	(30,063)	139,972
Net cash transferred to discontinued operation	(223)	(208)
Effect of exchange rate changes on cash and cash equivalents	(18)	(358)
Net change in cash and cash equivalents from continuing operations	7,504	330,526
Cash and cash equivalents of continuing operations at beginning of period	33,828	58,217
Cash and cash equivalents of continuing operations at end of period	41,332	388,743
Noncash investing activities:
Capital expenditures included in accounts payable	1,086
Cash flows from discontinued operation of MicroEdge, Inc.:
Net cash used in operating activities	(223)	(208)
Net cash transferred from continuing operations	$ 223	$ 208