CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) [Abstract]
REVENUES	$ 223,497	$ 282,180	$ 429,463	$ 570,680
COSTS AND EXPENSES:
Direct operating costs (excluding items below)	104,517	105,444	215,791	209,907
Depreciation and amortization	40,807	33,928	78,961	67,382
Selling, general and administrative	21,729	18,626	42,543	34,617
Gain on disposals of property and equipment	(1,391)	(17)	(1,422)	(288)
Charges to settle litigation (Note 8)	6,100	4,500	6,100	4,500
Total costs and expenses	171,762	162,481	341,973	316,118
INCOME FROM OPERATIONS	51,735	119,699	87,490	254,562
OTHER INCOME (EXPENSE):
Interest expense, net of interest capitalized	(7,449)	(5,251)	(12,768)	(10,930)
Interest income	32	211	61	372
Other - net	365	291	(719)	308
Total other income (expense) - net	(7,052)	(4,749)	(13,426)	(10,250)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	44,683	114,950	74,064	244,312
Provision for income taxes	280	31,505	2,866	71,933
NET INCOME FROM CONTINUING OPERATIONS	44,403	83,445	71,198	172,379
DISCONTINUED OPERATIONS (Note 2):
Income (loss) from discontinued operations, net of tax	(3,017)	7,471	2,260	(16,840)
Gain on sale of discontinued operations, net of tax	424,473	0	424,473	0
Discontinued operations, net of tax	421,456	7,471	426,733	(16,840)
NET INCOME	$ 465,859	$ 90,916	$ 497,931	$ 155,539
INCOME (LOSS) PER SHARE - BASIC:
Income from continuing operations	$ 0.35	$ 0.74	$ 0.57	$ 1.53
Discontinued operations	$ 3.34	$ 0.07	$ 3.39	$ (0.15)
Net income	$ 3.69	$ 0.80	$ 3.96	$ 1.38
INCOME (LOSS) PER SHARE - DILUTED:
Income from continuing operations	$ 0.35	$ 0.73	$ 0.56	$ 1.50
Discontinued operations	$ 3.30	$ 0.07	$ 3.35	$ (0.15)
Net income	$ 3.65	$ 0.79	$ 3.91	$ 1.36