Supplemental Consolidated Balance Sheet Information (Narrative) (Details) (USD $) Share data in Thousands, unless otherwise specified	0 Months Ended	3 Months Ended		6 Months Ended
	Apr. 29, 2011	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Lease Obligations Maturity, Current				2020
Employee loans issued				$ 4,000,000	$ 7,300,000
Effective interest rate				5.00%
Accrued interest recorded as compensation expense		400,000	300,000	700,000	600,000
Employee retention and signing bonuses, maximum term		7		7
Retention and Sign On Bonuses Issued				5,200,000	10,900,000
Payments of Debt Issuance Costs				(2,814,000)
Acquisition-related stock issuance and adjustment	5,700,000			6,013,000
Acquisition-related stock issuance and adjustment, shares	591			591
Liability for abandoned real estate		1,000,000		1,000,000
Office closure obligations		3,900,000		3,900,000
Cash payments relating to office closure obligations		2,600,000		2,600,000
Office Termination Fee Obligation				1,200,000
Chicago Partners [Member]
Acquisition-related stock issuance and adjustment		5,700,000
Acquisition-related stock issuance and adjustment, shares		591
Daylight Forensic & Advisory LLC [Member]
Cash paid for acquisition		$ 10,000,000		$ 10,000,000
Maximum [Member]
Lease Obligations Maturity				2022
Unsecured employee loan terms				five
Minimum [Member]
Unsecured employee loan terms				three