Acquisitions (Details 2) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012
Maximum contingent consideration due in 2012	$ 200
Maximum contingent consideration due in 2013	4,883
Maximum contingent consideration due in 2014	2,699
Maximum contingent consideration due Total	7,782
Milsom [Member]
Original range of potential undiscounted payments minimum	0
Original range of potential undiscounted payments maximum	3,600
Maximum contingent consideration due in 2012	0
Maximum contingent consideration due in 2013	300
Maximum contingent consideration due in 2014	0
Maximum contingent consideration due Total	300
Option Six [Member]
Original range of potential undiscounted payments minimum	0
Original range of potential undiscounted payments maximum	2,000
Maximum contingent consideration due in 2012	200
Maximum contingent consideration due in 2013	0
Maximum contingent consideration due in 2014	0
Maximum contingent consideration due Total	200
Marton House [Member]
Original range of potential undiscounted payments minimum	0
Original range of potential undiscounted payments maximum	3,849
Maximum contingent consideration due in 2012	0
Maximum contingent consideration due in 2013	1,294
Maximum contingent consideration due in 2014	0
Maximum contingent consideration due Total	1,294
Bath Consulting [Member]
Original range of potential undiscounted payments minimum	0
Original range of potential undiscounted payments maximum	2,435
Maximum contingent consideration due in 2012	0
Maximum contingent consideration due in 2013	889
Maximum contingent consideration due in 2014	1,099
Maximum contingent consideration due Total	1,988
Communication Consulting [Member]
Original range of potential undiscounted payments minimum	0
Original range of potential undiscounted payments maximum	700
Maximum contingent consideration due in 2012	0
Maximum contingent consideration due in 2013	300
Maximum contingent consideration due in 2014	0
Maximum contingent consideration due Total	300
Asentus [Member]
Original range of potential undiscounted payments minimum	0
Original range of potential undiscounted payments maximum	3,700
Maximum contingent consideration due in 2012	0
Maximum contingent consideration due in 2013	2,100
Maximum contingent consideration due in 2014	1,600
Maximum contingent consideration due Total	$ 3,700