Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2012

Supplemental Cash Flow Information

Supplemental cash flow information and non-cash investing and financing activities

			2012		2011		2010
Supplemental cash flow information:
	Cash paid for interest	$	366,458	$	274,234	$	219,408
	Cash paid for income taxes (net of refunds of $20,847, $9,277 and $9,977, respectively)		69,277		53,909		36,381
Non-cash investing and financing activities:
	(Decrease) increase in accounts payable and accrued expenses for purchases of property and equipment and construction activities		(10,244)		8,507		11,253
	Purchases of property and equipment under capital leases		19,219		6,800		2,200
	Fair value of debt assumed through acquisitions		-		209,321		-