Consolidated Statement Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Continuing Operations
Service revenues and sales	$ 366,641	$ 352,943
Cost of services provided and goods sold (excluding depreciation)	264,307	257,445
Selling, general and administrative expenses	55,560	53,167
Depreciation	6,795	6,241
Amortization	1,127	1,113
Total costs and expenses	327,789	317,966
Income from operations	38,852	34,977
Interest expense	(4,094)	(3,617)
Other income - net	1,706	2,095
Income before income taxes	36,464	33,455
Income taxes	(14,186)	(13,010)
Net income	$ 22,278	$ 20,445
Earnings Per Share
Net income	$ 1.20	$ 1.08
Average number of shares outstanding	18,522	18,958
Diluted Earnings Per Share
Net income	$ 1.17	$ 1.06
Average number of shares outstanding	19,000	19,353
Cash Dividends Per Share	$ 0.18	$ 0.16