Acquisitions (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Liability as of Dec. 31, 2011	$ 3,278
2012 Additions (Payments)	(1,100)
Change in Fair Value of Contingent Consideration	789
Foreign Currency Translation	117
Liability as of Dec.31, 2012	3,084
Milsom [Member]
Liability as of Dec. 31, 2011	682
2012 Additions (Payments)	(437)
Change in Fair Value of Contingent Consideration	44
Foreign Currency Translation	13
Liability as of Dec.31, 2012	302
Option Six [Member]
Liability as of Dec. 31, 2011	800
2012 Additions (Payments)	(800)
Change in Fair Value of Contingent Consideration	0
Foreign Currency Translation	0
Liability as of Dec.31, 2012	0
Marton House [Member]
Liability as of Dec. 31, 2011	311
2012 Additions (Payments)	0
Change in Fair Value of Contingent Consideration	452
Foreign Currency Translation	11
Liability as of Dec.31, 2012	774
Bath Consulting [Member]
Liability as of Dec. 31, 2011	1,197
2012 Additions (Payments)	(350)
Change in Fair Value of Contingent Consideration	557
Foreign Currency Translation	60
Liability as of Dec.31, 2012	1,464
Academy Of Training Ltd [Member]
Liability as of Dec. 31, 2011	49
2012 Additions (Payments)	(78)
Change in Fair Value of Contingent Consideration	29
Foreign Currency Translation	0
Liability as of Dec.31, 2012	0
Asentus [Member]
Liability as of Dec. 31, 2011	0
2012 Additions (Payments)	765
Change in Fair Value of Contingent Consideration	(251)
Foreign Currency Translation	30
Liability as of Dec.31, 2012	544
Communication Consulting [Member]
Liability as of Dec. 31, 2011	239
2012 Additions (Payments)	(200)
Change in Fair Value of Contingent Consideration	(42)
Foreign Currency Translation	3
Liability as of Dec.31, 2012	$ 0