Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2011

Summary of Significant Accounting Policies

Property and equipment, including original useful lives

	Original Useful Lives		December 31, 2011		December 31, 2010
Land		$	462,790	$	392,600
Buildings and building improvements	15– 39 years		1,012,709		921,929
Leasehold improvements	3– 25 years		395,274		370,018
Furniture, fixtures and equipment	3– 20 years		906,257		777,485
Vehicles	5– 10 years		206,685		182,942
Construction in progress			43,281		60,460
Total property and equipment			3,026,996		2,705,434
Less:  accumulated depreciation and amortization			933,229		775,339
Net property and equipment		$	2,093,767	$	1,930,095

Components of self-insurance reserves

	2011		2010
Self-insurance reserves (undiscounted)	$	116,696	$	109,351
Self-insurance reserves (discounted)	$	106,011	$	99,612