CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash flows from operating activities:
Net income	$ 12,038	$ 9,259	$ 7,763
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	6,771	5,142	4,726
Depreciation	6,563	5,791	3,347
Amortization of intangibles	1,029	1,486	1,973
Provision for doubtful accounts, net	290	166	68
Deferred income taxes	229	832	2,865
Changes in operating assets and liabilities, net of acquisition:
Accounts receivable	(4,798)	(6,391)	(2,760)
Prepaid expenses and other current assets	665	(2,687)	(1,948)
Deferred implementation costs	(84)	(28)	12
Security deposits	146	(174)	23
Other assets	116		(116)
Accounts payable	1,451	45	1,836
Accrued expenses	211	1,224	2,367
Deferred revenue	447	884	866
Net cash provided by operating activities	25,074	15,549	21,022
Cash flows from investing activities:
Purchases of property and equipment, including capitalized software	(7,268)	(8,002)	(5,442)
Acquisition of NuConomy, net of cash acquired		(789)
Acquisition of Proficient	(75)	(95)	(98)
Acquisition of patents			(475)
Net cash used in investing activities	(7,343)	(8,886)	(6,015)
Cash flows from financing activities:
Repurchase of common stock		(3,649)	(28)
Excess tax benefit from the exercise of employee stock options and warrants	4,001	1,397	936
Proceeds from issuance of common stock in connection with the exercise of options and warrants	10,280	11,484	4,191
Net cash provided by financing activities	14,281	9,232	5,099
Effect of foreign exchange rate changes on cash and cash equivalents	(70)	(131)	(34)
Net increase in cash and cash equivalents	31,942	15,764	20,072
Cash and cash equivalents at the beginning of the year	61,336	45,572	25,500
Cash and cash equivalents at the end of the year	$ 93,278	$ 61,336	$ 45,572