CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
REVENUES	$ 431,103	[1]	$ 421,466	[1]	$ 425,005	[1]	$ 416,723	[1]	$ 427,677	[1]	$ 435,727	[1]	$ 433,897	[1]	$ 426,356	[1]	$ 1,694,297	$ 1,723,657	$ 1,688,805
EXPENSES:
Operating																	1,220,351	1,217,051	1,158,269
General and administrative																	103,590	88,935	91,227
Depreciation and amortization																	112,692	113,063	107,568
Asset impairments																	6,513
Costs and Expenses, Total																	1,443,146	1,419,049	1,357,064
OPERATING INCOME	56,019	[1]	67,271	[1]	67,969	[1]	59,892	[1]	80,299	[1]	79,733	[1]	75,125	[1]	69,451	[1]	251,151	304,608	331,741
OTHER (INCOME) EXPENSE:
Interest expense, net																	45,126	58,363	72,940
Expenses associated with debt refinancing transactions																	36,528	2,099
Other (income) expense																	(100)	(333)	305
Total non-operating expense (income)																	81,554	60,129	73,245
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES																	169,597	244,479	258,496
Income tax benefit (expense)																	134,995	(87,513)	(96,166)
INCOME FROM CONTINUING OPERATIONS																	304,592	156,966	162,330
(Loss) income from discontinued operations, net of taxes			(663)	[1]	(2,739)	[1]	(355)	[1]	150	[1]	99	[1]	(150)	[1]	(304)	[1]	(3,757)	(205)	180
NET INCOME	$ 47,471	[1]	$ 51,843	[1]	$ 20,429	[1]	$ 181,092	[1]	$ 45,408		$ 42,339		$ 37,334		$ 31,680		$ 300,835	$ 156,761	$ 162,510
BASIC EARNINGS PER SHARE:
Income from continuing operations																	$ 2.77	$ 1.58	$ 1.55
(Loss) income from discontinued operations, net of taxes																	$ (0.03)
Net income	$ 0.41	[2]	$ 0.45	[2]	$ 0.19	[2]	$ 1.81	[2]	$ 0.46		$ 0.42		$ 0.37		$ 0.32		$ 2.74	$ 1.58	$ 1.55
DILUTED EARNINGS PER SHARE:
Income from continuing operations																	$ 2.73	$ 1.56	$ 1.54
(Loss) income from discontinued operations, net of taxes																	$ (0.03)
Net income	$ 0.41	[2]	$ 0.44	[2]	$ 0.19	[2]	$ 1.78	[2]	$ 0.45		$ 0.42		$ 0.37		$ 0.32		$ 2.70	$ 1.56	$ 1.54
Regular Dividend
DILUTED EARNINGS PER SHARE:
Dividend declared on common stock, per share																	$ 1.97	$ 0.60
Special Dividend
DILUTED EARNINGS PER SHARE:
Dividend declared on common stock, per share																	$ 6.66

[1] The amounts presented for the first two quarters of 2013 and the four quarters of 2012 are not equal to the same amounts previously reported in the respective reports on Form 10-Q and Form 10-K for each period as a result of discontinued operations. Below is a reconciliation to the previously reported amounts in Form 10-Q.

[2] The earnings per share amounts in the first quarter of 2013 were favorably impacted by the net tax benefit resulting from the revaluation of certain deferred tax assets and liabilities associated with the REIT conversion effective January 1, 2013. Additionally, the earnings per share amounts in the second quarter of 2013 were negatively impacted by $36.3 million of expenses associated with debt refinancing transactions.