Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues:
Research services	$ 52,604	$ 52,322	$ 104,462	$ 103,115
Advisory services and events	30,207	30,625	53,536	52,903
Total revenues	82,811	82,947	157,998	156,018
Operating expenses:
Cost of services and fulfillment	32,560	33,558	63,321	63,038
Selling and marketing	28,481	28,630	58,112	58,513
General and administrative	9,276	9,815	19,034	19,342
Depreciation	2,096	2,289	4,203	5,062
Amortization of intangible assets	224	536	445	1,075
Reorganization costs	81	1,039	3,505	1,888
Total operating expenses	72,718	75,867	148,620	148,918
Income from operations	10,093	7,080	9,378	7,100
Other income (expense), net	(99)	79	183	15
Gains (losses) on investments, net	10	43	(9)	80
Income before income taxes	10,004	7,202	9,552	7,195
Income tax provision	4,254	2,913	4,026	2,972
Net income	$ 5,750	$ 4,289	$ 5,526	$ 4,223
Basic income per common share	$ 0.32	$ 0.23	$ 0.31	$ 0.22
Diluted income per common share	$ 0.31	$ 0.23	$ 0.30	$ 0.22
Basic weighted average common shares outstanding	18,007	18,757	18,033	19,184
Diluted weighted average common shares outstanding	18,268	19,044	18,314	19,479
Cash dividends declared per common share	$ 0.17	$ 0.16	$ 0.34	$ 0.32