Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
REVENUES:	$ 426,000	$ 404,222
EXPENSES:
Operating	300,662	287,380
General and administrative	26,872	25,392
Depreciation and amortization	28,685	28,384
Asset impairments	955
Costs and Expenses, Total	357,174	341,156
OPERATING INCOME	68,826	63,066
OTHER (INCOME) EXPENSE:
Interest expense, net	10,190	10,348
Other income	(26)	(387)
Total non-operating expense (income)	10,164	9,961
INCOME BEFORE INCOME TAXES	58,662	53,105
Income tax expense	(1,385)	(1,367)
NET INCOME	$ 57,277	$ 51,738
BASIC EARNINGS PER SHARE	$ 0.49	$ 0.45
DILUTED EARNINGS PER SHARE	$ 0.49	$ 0.44
Regular Dividend
OTHER (INCOME) EXPENSE:
Dividend declared on common stock, per share	$ 0.54	$ 0.51