CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net (loss) income	$ (2,061)	$ 3,263
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Stock-based compensation expense	5,952	4,794
Depreciation	4,048	3,329
Amortization of intangibles	884	153
Deferred income taxes	(1,174)	(740)
Provision for doubtful accounts, net		20
CHANGES IN OPERATING ASSETS AND LIABILITIES:
Accounts receivable	(1,531)	1,388
Prepaid expenses and other current assets	(1,524)	(1,920)
Deferred implementation costs	13	25
Security deposits	(19)	(189)
Accounts payable	(5,208)	1,296
Accrued expenses	1,553	2,173
Deferred revenue	(254)	675
Net cash provided by operating activities	679	14,267
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment, including capitalized software	(4,661)	(2,970)
Acquisition of Look.io, net of cash acquired		(900)
Acquisition of Amadesa technology assets		(10,798)
Acquisition of Proficient		(77)
Acquisition of domains	(50)
Acquisition costs - Engage, net of cash	(79)
Net cash used in investing activities	(4,790)	(14,745)
CASH FLOWS FROM FINANCING ACTIVITIES:
Excess tax benefit from the exercise of employee stock options	135	1,156
Proceeds from issuance of common stock in connection with the exercise of options	2,318	6,573
Repurchase of common stock	(26,526)
Net cash (used in) provided by financing activities	(24,073)	7,729
Effect of foreign exchange rate changes on cash and cash equivalents	(203)	47
Net (decrease) increase in cash and cash equivalents	(28,387)	7,298
Cash and cash equivalents at the beginning of the period	103,339	93,278
Cash and cash equivalents at the end of the period	$ 74,952	$ 100,576