Unaudited Condensed Consolidated Statements of Operations and Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Statement [Abstract]
Net service revenues	$ 313,810	$ 279,956	$ 898,592	$ 791,667
Direct costs of services	215,519	188,901	622,389	536,662
Gross profit	98,291	91,055	276,203	255,005
Selling, general and administrative expenses	82,090	75,284	234,218	221,732
Depreciation and amortization	2,642	2,536	7,391	7,395
Income from operations	13,559	13,235	34,594	25,878
Other expense, net	218	386	1,025	816
Income from continuing operations before income taxes	13,341	12,849	33,569	25,062
Income tax expense	5,346	5,213	13,232	10,053
Income from continuing operations	7,995	7,636	20,337	15,009
Income from discontinued operations, net of taxes	57,023	1,343	61,633	4,012
Net income	65,018	8,979	81,970	19,021
Other comprehensive (loss) income:
Defined benefit pension and postretirement plans, net of tax	(172)	33	(205)	101
Comprehensive income	$ 64,846	$ 9,012	$ 81,765	$ 19,122
Earnings per share - basic:
From continuing operations	$ 0.26	$ 0.23	$ 0.63	$ 0.44
From discontinued operations	$ 1.81	$ 0.04	$ 1.91	$ 0.12
Earnings per share - basic	$ 2.07	$ 0.27	$ 2.54	$ 0.56
Earnings per share - diluted:
From continuing operations	$ 0.25	$ 0.23	$ 0.63	$ 0.44
From discontinued operations	$ 1.81	$ 0.04	$ 1.89	$ 0.12
Earnings per share - diluted	$ 2.06	$ 0.27	$ 2.52	$ 0.56
Weighted average shares outstanding - basic	31,347	32,985	32,267	33,705
Weighted average shares outstanding - diluted	31,553	33,130	32,495	33,820
Cash dividends declared per share	$ 0.10		$ 0.30