Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
REVENUE:
Management and other	$ 1,733,409	$ 1,672,474	$ 1,626,728
Rental	2,204	2,557	2,165
Total Revenues	1,735,613	1,675,031	1,628,893
EXPENSES:
Operating	1,203,400	1,163,771	1,135,055
General and administrative	91,227	84,148	86,537
Depreciation and amortization	108,931	104,051	99,939
Total operating expenses	1,403,558	1,351,970	1,321,531
OPERATING INCOME	332,055	323,061	307,362
OTHER (INCOME) EXPENSE:
Interest expense, net	72,940	71,127	72,780
Expenses associated with debt refinancing transactions			3,838
Other (income) expense	304	40	(139)
Total non-operating (income) expense	73,244	71,167	76,479
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	258,811	251,894	230,883
Income tax expense	(96,301)	(94,297)	(79,541)
INCOME FROM CONTINUING OPERATIONS	162,510	157,597	151,342
Income (loss) from discontinued operations, net of taxes		(404)	3,612
NET INCOME	$ 162,510	$ 157,193	$ 154,954
BASIC EARNINGS PER SHARE:
Income from continuing operations	$ 1.55	$ 1.41	$ 1.30
Income (loss) from discontinued operations, net of taxes		$ (0.01)	$ 0.03
Net income	$ 1.55	$ 1.40	$ 1.33
DILUTED EARNINGS PER SHARE:
Income from continuing operations	$ 1.54	$ 1.39	$ 1.29
Income (loss) from discontinued operations, net of taxes			$ 0.03
Net income	$ 1.54	$ 1.39	$ 1.32