CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid In Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2012	$ 37	$ 205,568	$ (324)	$ (2,043)	$ (164,929)	$ 38,309
Balance (in shares) at Dec. 31, 2012	36,675
Increase (Decrease) in Stockholders' Equity
Net income attributable to ISG					4,776	4,776
Other comprehensive income (loss)				(405)		(405)
Equity securities repurchased			(4,055)			(4,055)
Proceeds from issuance of ESPP		55	327			382
Issuance of treasury shares		(1,256)	1,256
Issuance of common stock	$ 1	(1)
Issuance of common stock (in shares)	1,268
Tax benefit on stock issuance		851				851
Stock based compensation		3,385				3,385
Balance at Dec. 31, 2013	$ 38	208,602	(2,796)	(2,448)	(160,153)	43,243
Balance (in shares) at Dec. 31, 2013	37,943
Increase (Decrease) in Stockholders' Equity
Net income attributable to ISG					6,178	6,178
Other comprehensive income (loss)				(2,134)		(2,134)
Equity securities repurchased			(5,320)			(5,320)
Proceeds from issuance of ESPP		(2)	578			576
Issuance of treasury shares		(2,294)	2,294
Accretion attributable to noncontrolling interest					(45)	(45)
Reduction of ownership in Compass Italy		(343)				(343)
Dividend declared		(5,128)				(5,128)
Acquisition		237				237
Tax benefit on stock issuance		346				346
Stock based compensation		3,107				3,107
Balance at Dec. 31, 2014	$ 38	204,525	(5,244)	(4,582)	(154,020)	$ 40,717
Balance (in shares) at Dec. 31, 2014	37,943					37,943
Increase (Decrease) in Stockholders' Equity
Net income attributable to ISG					4,841	$ 4,841
Other comprehensive income (loss)				(1,956)		(1,956)
Equity securities repurchased		2	(3,383)			(3,381)
Proceeds from issuance of ESPP		(80)	661			581
Issuance of treasury shares		(4,913)	4,913
Accretion attributable to noncontrolling interest		(78)				(78)
Dividend declared		(61)				(61)
Acquisition		150				150
Acquisition (in shares)	34
Tax benefit on stock issuance		310				310
Stock based compensation		5,049				5,049
Balance at Dec. 31, 2015	$ 38	$ 204,904	$ (3,053)	$ (6,538)	$ (149,179)	$ 46,172
Balance (in shares) at Dec. 31, 2015	37,977					37,977