Item 6. SELECTED FINANCIAL DATA



	Year Ended December 31,
(In thousands, except per share amounts)
	2014		2013		2012		2011		2010
Operating Data:
Revenue from operations	$	2,787,897	$	2,337,648	$	2,134,579	$	1,903,800	$	1,501,848
Depreciation and amortization expense	146,466		127,072		110,743		90,820		80,362
Total operating expenses	2,346,590		1,999,210		1,849,325		1,669,728		1,364,109
Operating income	441,307		338,438		285,254		234,072		137,739
Interest expense, net (1)	6,502		9,473		11,428		13,887		12,465
Provision for income taxes	165,000		122,573		103,646		80,614		48,775
Net income	267,514		206,113		169,452		139,470		75,651

Per Share Data:
Diluted earnings per share	$	3.10	$	2.39	$	1.97	$	1.63	$	0.90

Balance Sheet Data:
Cash and cash equivalents	$	34,787	$	30,174	$	12,857	$	75,850	$	5,450
Current assets	433,143		332,979		275,028		331,852		222,582
Total assets	2,236,237		1,932,089		1,712,514		1,513,074		1,239,881
Current liabilities	255,638		232,122		225,139		204,810		170,046
Long-term debt (including current maturities)	155,714		191,429		240,407		269,185		271,217
Shareholders’ equity	1,494,064		1,232,082		1,025,969		856,519		668,649


(1)	For the purpose of this table, interest expense is presented net of interest income.