Goodwill and Intangible Assets (Details Textual) (USD $)	12 Months Ended						1 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Recovery Audit Services - Americas [Member]	Dec. 31, 2013 Recovery Audit Services - Americas [Member]	Dec. 31, 2011 Recovery Audit Services - Americas [Member]	Dec. 31, 2011 Recovery Audit Services - Americas [Member] Business Strategy, Inc [Member]	Dec. 31, 2012 Recovery Audit Services - Europe/Asia-Pacific [Member] firm	Dec. 31, 2013 Recovery Audit Services - Europe/Asia-Pacific [Member]	Dec. 31, 2011 Recovery Audit Services - Europe/Asia-Pacific [Member]
Goodwill [Line Items]
Goodwill, accumulated impairment losses					$ 359,900,000
Goodwill and Intangible Assets (Textual) [Abstract]
Goodwill through Acquisition		696,000		0			7,800,000	696,000
Purchase price adjustments							200,000	700,000
Goodwill	13,686,000	13,669,000	12,946,000	12,177,000	12,177,000	12,177,000	7,600,000	896,000	913,000	173,000
Number of firms acquired								2
Goodwill and Intangible Assets (Additional Textual) [Abstract]
Amortization expense	4,802,000	5,394,000	(4,600,000)
Project amortization expense 2014	3,600,000
Project amortization expense 2015	2,700,000
Project amortization expense 2016	1,700,000
Project amortization expense 2017	1,400,000
Project amortization expense 2018	$ 1,200,000