Nature Of Operations (Details)	3 Months Ended			3 Months Ended
	Mar. 31, 2012 segments	Feb. 29, 2012 Acquisition Yokogawa-ORC [Member]	Mar. 31, 2012 Kroll Divestiture [Member]	Mar. 31, 2012 Acquisition RJF [Member]	Mar. 31, 2012 Acquisition Hampton Roads [Member]	Mar. 31, 2012 Acquisition Evaluation Associates LLC [Member]	Mar. 31, 2012 Acquisition Hammond Associates [Member]	Mar. 31, 2012 Boston Office of Kinloch Consulting Group Inc. [Member]	Mar. 31, 2012 Prescott Pailet Benefits [Member]	Mar. 31, 2012 Mahoney Associates [Member]
Number of business segments (in segments)	2
Business combination remaining percent acquired		49.00%
Acquisition date				2011-01-31	2011-02-28	2011-06-30	2010-03-31	2011-02-28	2011-07-31	2011-07-31
MMC sale date of Kroll to Altegrity			Aug. 03, 2010