CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS)
Revenues	$ 209,617	$ 210,982	$ 192,745
Operating expenses
Direct costs and expenses for advisors	124,132	123,985	114,429
Selling, general and administrative	65,434	67,823	62,909
Depreciation and amortization	7,373	7,473	8,857
Operating income	12,678	11,701	6,550
Interest income	18	20	45
Interest expense	(2,229)	(2,712)	(3,146)
Gain on extinguishment of debt		79
Bargain purchase gain	146
Foreign currency transaction loss	(145)	(45)	(209)
Income before taxes	10,468	9,043	3,240
Income tax provision	4,164	4,267	2,637
Net income	6,304	4,776	603
Net income attributable to noncontrolling interest	126
Net income attributable to ISG	6,178	4,776	603
Weighted average shares outstanding:
Basic (in shares)	37,086	36,810	36,205
Diluted (in shares)	38,693	38,687	37,626
Earnings per share attributable to ISG:
Basic (in dollars per share)	$ 0.17	$ 0.13	$ 0.02
Diluted (in dollars per share)	$ 0.16	$ 0.13	$ 0.02
Cash dividends declared	$ 0.14
Comprehensive income:
Net Income	6,178	4,776	603
Foreign currency translation, net of tax (expense) benefit of $1,128, $248 and $(149)	(2,134)	(405)	204
Comprehensive income	4,170	4,371	807
Comprehensive income attributable to noncontrolling interest	126
Comprehensive income attributable to ISG	$ 4,044	$ 4,371	$ 807