Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 103,339	$ 93,278
Accounts receivable, net of allowance for doubtful accounts of $708 and $688, in 2012 and 2011, respectively	23,830	20,999
Prepaid expenses and other current assets	6,369	5,390
Deferred tax assets, net	2,616	2,342
Total current assets	136,154	122,009
Property and equipment, net	17,495	13,879
Intangibles, net	15,681	1,095
Goodwill	32,645	24,090
Deferred tax assets, net	4,183	2,829
Deferred implementation costs, net of current	240	247
Security deposits	669	356
Other assets	1,509	1,546
Total assets	208,576	166,051
Current liabilities:
Accounts payable	11,125	8,258
Accrued expenses	17,911	12,019
Deferred revenue	6,525	5,378
Total current liabilities	35,561	25,655
Deferred revenue, net of current	1,263	1,152
Other liabilities	1,509	1,546
Total liabilities	38,333	28,353
Commitments and contingencies
Stockholders' equity:
Preferred stock, $.001 par value per share; 5,000,000 shares authorized, 0 shares issued and outstanding at December 31, 2012 and 2011
Common stock, $.001 par value per share; 100,000,000 shares authorized, 55,948,924 shares issued and outstanding at December 31, 2012; 54,090,344 shares issued and outstanding at December 31, 2011	56	54
Additional paid-in capital	252,320	226,113
Accumulated deficit	(81,780)	(88,135)
Accumulated other comprehensive loss	(353)	(334)
Total stockholders' equity	170,243	137,698
Total liabilities and stockholders' equity	$ 208,576	$ 166,051