Consolidated Statements Of Earnings (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Consolidated Statements Of Earnings
Gross Revenue	$ 218,691	$ 197,711	$ 626,828	$ 571,796
Direct Costs	137,343	124,060	389,086	356,750
Operating costs and expenses:
Indirect and selling expenses	60,341	55,348	177,537	162,508
Depreciation and amortization	2,544	2,716	8,083	8,027
Amortization of intangible assets	2,369	3,082	7,105	9,245
Total operating costs and expenses	65,254	61,146	192,725	179,780
Operating income	16,094	12,505	45,017	35,266
Interest expense	(539)	(776)	(1,732)	(2,656)
Other income		99	89	197
Income before income taxes	15,555	11,828	43,374	32,807
Provision for income taxes	6,221	4,435	17,351	12,793
Net income	$ 9,334	$ 7,393	$ 26,023	$ 20,014
Earnings per Share:
Basic	$ 0.47	$ 0.38	$ 1.32	$ 1.03
Diluted	$ 0.47	$ 0.38	$ 1.31	$ 1.02
Weighted-average Shares:
Basic	19,728	19,413	19,666	19,349
Diluted	19,860	19,630	19,888	19,579