Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Statement [Abstract]
Revenues	$ 1,263,460	$ 1,127,698	$ 1,169,267
Operating expenses:
Direct salaries and related costs	855,266	737,952	763,930
General and administrative	297,519	290,373	287,033
Depreciation, net	42,084	40,369	46,111
Amortization of intangibles	14,863	10,479	7,961
Net (gain) loss on disposal of property and equipment	201	391	(3,021)
Impairment of long-lived assets		355	1,718
Total operating expenses	1,209,933	1,079,919	1,103,732
Income from continuing operations	53,527	47,779	65,535
Other income (expense):
Interest income	866	1,458	1,352
Interest (expense)	(2,307)	(1,547)	(1,132)
Other (expense)	(761)	(2,533)	(2,099)
Total other income (expense)	(2,202)	(2,622)	(1,879)
Income from continuing operations before income taxes	51,325	45,157	63,656
Income taxes	14,065	5,207	11,342
Income from continuing operations, net of taxes	37,260	39,950	52,314
(Loss) from discontinued operations, net of taxes		(820)	(4,532)
Gain (loss) on sale of discontinued operations, net of taxes		(10,707)	559
Net income	$ 37,260	$ 28,423	$ 48,341
Basic:
Continuing operations	$ 0.87	$ 0.93	$ 1.15
Discontinued operations		$ (0.27)	$ (0.09)
Net income (loss) per common share	$ 0.87	$ 0.66	$ 1.06
Diluted:
Continuing operations	$ 0.87	$ 0.93	$ 1.15
Discontinued operations		$ (0.27)	$ (0.09)
Net income (loss) per common share	$ 0.87	$ 0.66	$ 1.06
Weighted average common shares outstanding:
Basic	42,877	43,105	45,506
Diluted	42,925	43,148	45,607