Goodwill and Intangible Assets (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Goodwill and Intangible Assets (Textual) [Abstract]
Goodwill	$ 13,669,000	$ 12,946,000
Goodwill and Intangible Assets (Additional Textual) [Abstract]
Amortization expense	5,394,000	4,606,000	4,000,000
Project amortization expense 2013	4,900,000
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
Business Strategy, Inc [Member]
Goodwill and Intangible Assets (Textual) [Abstract]
Reduced value of goodwill from BSI	7,600,000
Purchase price adjustments	200,000
Recovery Audit Services - Americas [Member]
Goodwill and Intangible Assets (Textual) [Abstract]
Goodwill through Acquisition		7,800,000
Recovery Audit Services - Europe/Asia- Pacific [Member]
Goodwill and Intangible Assets (Textual) [Abstract]
Goodwill	$ 700,000	$ 200,000