Consolidated Statements of Operations and Comprehensive Income (Loss) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Net service revenues	$ 1,217,331	$ 1,073,728	$ 1,005,487
Direct costs of services	842,750	729,352	684,901
Gross profit	374,581	344,376	320,586
Selling, general and administrative expenses	315,338	307,944	305,940
Goodwill impairment	0	14,510	69,158
Depreciation and amortization	9,894	9,846	10,789
Income (loss) from operations	49,349	12,076	(65,301)
Other expense (income):
Interest expense	1,411	1,225	954
Other (income) expense	(19)	(78)	103
Income (loss) from continuing operations, before income taxes	47,957	10,929	(66,358)
Income tax expense (benefit)	18,559	5,635	(24,227)
Income (loss) from continuing operations	29,398	5,294	(42,131)
Income from discontinued operations, net of income taxes	61,517	5,493	28,428
Net income (loss)	90,915	10,787	(13,703)
Other comprehensive (loss) income:
Defined benefit pension and post-retirement plans, net of tax	(688)	3,030	1,337
Comprehensive income (loss)	$ 90,227	$ 13,817	$ (12,366)
Earnings (loss) per share – basic:
From continuing operations	$ 0.94	$ 0.16	$ (1.18)
From discontinued operations	$ 1.95	$ 0.16	$ 0.80
Earnings (loss) per share – basic	$ 2.89	$ 0.32	$ (0.38)
Earnings (loss) per share – diluted
From continuing operations	$ 0.93	$ 0.16	$ (1.18)
From discontinued operations	$ 1.94	$ 0.16	$ 0.80
Earnings (loss) per share – diluted	$ 2.87	$ 0.32	$ (0.38)
Weighted average shares outstanding – basic	31,475	33,511	35,791
Weighted average shares outstanding – diluted	31,691	33,643	35,791
Cash dividends declared per share	$ 0.41	$ 0.10	$ 1.00