Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues:
Research services	$ 52,727	$ 52,205	$ 160,998	$ 156,667
Advisory services and events	24,700	22,548	81,651	76,084
Total revenues	77,427	74,753	242,649	232,751
Operating expenses:
Cost of services and fulfillment	29,889	29,222	95,429	92,543
Selling and marketing	27,751	27,460	87,490	85,572
General and administrative	10,086	9,530	30,359	28,564
Depreciation	1,941	2,048	5,982	6,251
Amortization of intangible assets	208	224	627	669
Reorganization costs		928	1,026	4,433
Total operating expenses	69,875	69,412	220,913	218,032
Income from operations	7,552	5,341	21,736	14,719
Other income, net	229	159	374	342
Gains (losses) on investments, net	(1,085)	245	(1,139)	236
Income before income taxes	6,696	5,745	20,971	15,297
Income tax provision	3,584	1,295	9,110	5,321
Net income	$ 3,112	$ 4,450	$ 11,861	$ 9,976
Basic income per common share	$ 0.17	$ 0.25	$ 0.66	$ 0.55
Diluted income per common share	$ 0.17	$ 0.25	$ 0.65	$ 0.55
Basic weighted average common shares outstanding	18,062	17,892	17,896	17,986
Diluted weighted average common shares outstanding	18,435	18,065	18,168	18,231
Cash dividends declared per common share	$ 0.18	$ 0.17	$ 0.54	$ 0.51