Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Goodwill [Roll Forward]
Gross Balance	$ 89,009
Accumulated Impairment Losses	(44,491)	$ (43,581)
Translation	104
Gross Balance	90,023
Accumulated Impairment Losses	(44,491)	(43,581)
Engineering Solutions [Member]
Goodwill [Roll Forward]
Gross Balance	35,713
Accumulated Impairment Losses	(21,431)	(21,431)
Translation	0
Gross Balance	35,713
Accumulated Impairment Losses	(21,431)	(21,431)
Specialty Talent and Technology [Member]
Goodwill [Roll Forward]
Gross Balance	16,445
Accumulated Impairment Losses	0	0
Translation	0
Gross Balance	16,445
Accumulated Impairment Losses	0	0
Enterprise Talent Solutions [Member]
Goodwill [Roll Forward]
Gross Balance	22,491
Accumulated Impairment Losses	(17,487)	(16,868)
Translation	0
Gross Balance	23,110
Accumulated Impairment Losses	(17,487)	(16,868)
MRI [Member]
Goodwill [Roll Forward]
Gross Balance	14,360
Accumulated Impairment Losses	(5,573)	(5,282)
Translation	104
Gross Balance	14,755
Accumulated Impairment Losses	$ (5,573)	$ (5,282)