2013 | 2012 | 2011 | |||||||||
Supplemental cash flow information: | |||||||||||
Cash paid for interest | $ | 397,366 | $ | 366,458 | $ | 274,234 | |||||
Cash paid for income taxes (net of refunds of $19,701, $20,847 and $9,277, respectively) | 51,676 | 69,277 | 53,909 | ||||||||
Non-cash investing and financing activities: | |||||||||||
Increase (decrease) in accounts payable and accrued expenses for purchases of property and equipment and construction activities | 9,147 | (10,244 | ) | 8,507 | |||||||
Purchases of property and equipment under capital leases | 27,416 | 19,219 | 6,800 | ||||||||
Fair value of debt assumed through acquisitions | 1,576,186 | — | 209,321 | ||||||||