CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Revenues	$ 209,240	$ 209,617	$ 210,982
Operating expenses
Direct costs and expenses for advisors	124,701	124,132	123,985
Selling, general and administrative	67,841	65,434	67,823
Depreciation and amortization	7,083	7,373	7,473
Operating income	9,615	12,678	11,701
Interest income	14	18	20
Interest expense	(1,789)	(2,229)	(2,712)
Gain on extinguishment of debt			79
Bargain purchase gain		146
Foreign currency transaction gain (loss)	303	(145)	(45)
Income before taxes	8,143	10,468	9,043
Income tax provision	3,189	4,164	4,267
Net income	4,954	6,304	4,776
Net income attributable to noncontrolling interest	113	126
Net income attributable to ISG	$ 4,841	$ 6,178	$ 4,776
Weighted average shares outstanding:
Basic (in shares)	37,186	37,086	36,810
Diluted (in shares)	38,936	38,693	38,687
Earnings per share attributable to ISG:
Basic (in dollars per share)	$ 0.13	$ 0.17	$ 0.13
Diluted (in dollars per share)	$ 0.13	0.16	$ 0.13
Cash dividends declared		$ 0.14
Comprehensive income:
Net income	$ 4,954	$ 6,304	$ 4,776
Foreign currency translation, net of tax benefit of $1,102, $1,128 and $248	(1,956)	(2,134)	(405)
Comprehensive income	2,998	4,170	4,371
Comprehensive income attributable to noncontrolling interest	113	126
Comprehensive income attributable to ISG	$ 2,885	$ 4,044	$ 4,371