Segment Information (Schedule Of Segment Revenues Before Reimbursements, Segment Total Revenues And Segment Operating Profit) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting Information [Line Items]
Total revenues before reimbursements	$ 186,504	$ 187,066	$ 361,560	$ 370,200
Total revenues	208,097	209,655	405,845	419,154
Total segment operating profit	62,238	68,369	120,940	132,933
General and administrative expenses	34,237	32,556	67,339	65,122
Depreciation expense	4,953	4,100	9,262	7,830
Amortization expense	1,633	1,713	2,995	3,411
Other operating costs (benefit), net	119,805	290	118,645	(1,217)
Long-term compensation expense attributable to consultants (including share-based compensation expense)	2,526	3,663	6,300	8,145
Operating income (loss)	(100,916)	26,047	(83,601)	49,642
Interest and other expense, net	1,512	1,066	2,343	1,980
Income (loss) from continuing operations before income tax (benefit) expense	(102,428)	24,981	(85,944)	47,662
Disputes, Investigations & Economics [Member]
Segment Reporting Information [Line Items]
Total revenues before reimbursements	76,294	76,352	152,326	153,327
Total revenues	82,444	82,828	164,528	166,286
Total segment operating profit	26,213	25,393	50,931	51,210
Financial, Risk & Compliance [Member]
Segment Reporting Information [Line Items]
Total revenues before reimbursements	32,193	40,097	63,604	77,738
Total revenues	38,224	46,939	76,222	94,268
Total segment operating profit	13,541	16,791	27,009	30,938
Healthcare [Member]
Segment Reporting Information [Line Items]
Total revenues before reimbursements	54,446	46,814	99,181	90,397
Total revenues	60,476	52,383	110,842	101,574
Total segment operating profit	15,475	18,110	29,504	33,914
Energy [Member]
Segment Reporting Information [Line Items]
Total revenues before reimbursements	23,571	23,803	46,449	48,738
Total revenues	26,953	27,505	54,253	57,026
Total segment operating profit	$ 7,009	$ 8,075	$ 13,496	$ 16,871