Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Summary of Significant Accounting Policies

Property and equipment, including original useful lives

	Original Useful Lives		December 31, 2012		December 31, 2011
Land		$	420,292	$	462,790
Buildings and building improvements	15 – 39 years		1,078,265		1,012,709
Leasehold improvements	3 – 25 years		447,046		395,274
Furniture, fixtures and equipment	3 – 20 years		932,406		906,257
Vehicles	5 – 10 years		231,615		206,685
Construction in progress			159,946		43,281
Total property and equipment			3,269,570		3,026,996
Less:  accumulated depreciation and amortization			1,057,980		933,229
Net property and equipment		$	2,211,590	$	2,093,767

Components of self-insurance reserves

	December 31,
		2012		2011
Self-insurance reserves (undiscounted)	$	122,866	$	116,696
Self-insurance reserves (discounted)	$	111,840	$	106,011