Consolidated Statements Of Comprehensive Income (Loss) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Consolidated Statements Of Comprehensive Income (Loss) [Abstract]
Revenues before reimbursements	$ 186,504		$ 187,066		$ 361,560		$ 370,200
Reimbursements	21,593		22,589		44,285		48,954
Total revenues	208,097		209,655		405,845		419,154
Cost of services before reimbursable expenses	126,792		122,360		246,920		245,412
Reimbursable expenses	21,593		22,589		44,285		48,954
Total costs of services	148,385		144,949		291,205		294,366
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
Contingent acquisition liability adjustments, net	(2,444)				(3,604)
Office consolidation, net			290				498
Gain on disposition of assets							(1,715)
Goodwill impairment	122,045				122,045
Other impairment	204				204
Operating income (loss)	(100,916)		26,047		(83,601)		49,642
Interest expense	1,397		1,172		2,235		2,397
Interest income	(71)		(112)		(160)		(275)
Other (income) expense, net	186		6		268		(142)
Income (loss) from continuing operations before income tax (benefit) expense	(102,428)		24,981		(85,944)		47,662
Income tax (benefit) expense	(26,569)		10,732		(20,455)		20,298
Net income (loss) from continuing operations	(75,859)		14,249		(65,489)		27,364
Income (loss) from discontinued operations, net of tax			(299)		509		384
Net income (loss)	(75,859)		13,950		(64,980)		27,748
Basic per share data
Net income (loss) from continuing operations	$ (1.55)		$ 0.28		$ (1.34)		$ 0.55
Income (loss) from discontinued operations, net of tax			$ (0.01)		$ 0.01		$ 0.01
Net income (loss)	$ (1.55)	[1]	$ 0.28	[1]	$ (1.33)	[1]	$ 0.55	[1]
Shares used in computing basic per share data	48,971		50,041		48,917		50,168
Diluted per share data
Net income (loss) from continuing operations	$ (1.55)		$ 0.28		$ (1.34)		$ 0.53
Income (loss) from discontinued operations, net of tax			$ (0.01)		$ 0.01		$ 0.01
Net income (loss)	$ (1.55)		$ 0.27		$ (1.33)		$ 0.54
Shares used in computing diluted per share data	48,971		51,022		48,917		51,191
Net income (loss)	(75,859)		13,950		(64,980)		27,748
Other comprehensive income (loss), net of tax
Unrealized net income (loss), foreign currency translation	786		(744)		692		(6,085)
Unrealized net income (loss), on interest rate derivatives	(14)		45		(34)		35
Reclassification adjustment on interest rate derivatives included in interest expense and income tax expense	39		30		77		58
Other comprehensive income (loss), net of tax	811		(669)		735		(5,992)
Total comprehensive income (loss), net of tax	$ (75,048)		$ 13,281		$ (64,245)		$ 21,756

[1] Basic net income per share for the three and six months ended June 30, 2013 do not sum due to rounding.