Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Operating Activities:
Net income (loss)	$ 2,706	$ (2,506)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	5,031	5,160
Provision for bad debt	286	74
Amortization of investment premiums	648	1,214
Stock-based compensation expense	5,654	9,166
Deferred tax benefit	(891)	(1,805)
Excess tax benefit - stock options	(708)	(211)
Changes in operating assets and liabilities, net of businesses acquired:
Accounts receivable	(2,491)	(6,266)
Prepaid expenses and other current assets	(977)	506
Other assets	(82)	8
Accounts payable	(133)	(120)
Income taxes payable	478	1,260
Accrued expenses and other current liabilities	1,580	(472)
Accrued compensation expenses	(973)	539
Deferred revenue	1,085	111
Other liabilities	(641)	1,936
Net cash provided by operating activities	10,572	8,594
Investing activities:
Purchases of property and equipment, and other assets	(3,596)	(4,041)
Purchases of investments	(31,436)	(38,256)
Proceeds from sales and maturities of investments	17,370	37,545
Acquisition of businesses	(2,049)	(1,790)
Net cash used in investing activities	(19,711)	(6,542)
Financing activities:
Excess tax benefit--stock options	708	211
Proceeds from exercise of stock options	1,148	663
Net cash provided by financing activities	1,856	874
Net (decrease) increase in cash and cash equivalents	(7,283)	2,926
Cash and cash equivalents at beginning of period	32,584	20,884
Cash and cash equivalents at end of period	25,301	23,810
Supplemental disclosure of cash flow information:
Cash paid for interest	0	0
Cash paid for taxes	$ 3,601	$ 1,341