Acquisitions (Details 3) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Liability as of Dec. 31, 2011	$ 3,278
2012 Additions (Payments)	(1,100)
Change in Fair Value of Contingent Consideration	863
Foreign Currency Translation	111
Liability as of Sep. 30, 2012	3,152
Milsom [Member]
Liability as of Dec. 31, 2011	682
2012 Additions (Payments)	(437)
Change in Fair Value of Contingent Consideration	42
Foreign Currency Translation	13
Liability as of Sep. 30, 2012	300
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 Sep. 30, 2012	0
Marton House [Member]
Liability as of Dec. 31, 2011	311
2012 Additions (Payments)	0
Change in Fair Value of Contingent Consideration	419
Foreign Currency Translation	11
Liability as of Sep. 30, 2012	741
Bath Consulting [Member]
Liability as of Dec. 31, 2011	1,197
2012 Additions (Payments)	(350)
Change in Fair Value of Contingent Consideration	421
Foreign Currency Translation	59
Liability as of Sep. 30, 2012	1,327
Academy Of Training [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 Sep. 30, 2012	0
Asentus [Member]
Liability as of Dec. 31, 2011	0
2012 Additions (Payments)	765
Change in Fair Value of Contingent Consideration	(6)
Foreign Currency Translation	25
Liability as of Sep. 30, 2012	784
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 Sep. 30, 2012	$ 0