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Supplemental Cash Flow Information (Tables)

9 Months Ended

Sep. 30, 2016

Supplemental Cash Flow Information [Abstract]

Supplemental Disclosure of Cash Flow Information and Non-cash Investing and Financing Activities

	Nine Months Ended September 30,
	2016				2015
Supplemental disclosure of cash flow information:
Interest paid	$	357,094			$	364,147
Income taxes paid	11,740				23,865
Supplemental disclosure of non-cash investing and financing activities:
Increase (decrease) in accounts payable for purchases of property and equipment	1,390				(5,399		)
Purchase of property and equipment under capital leases and installment purchases	40,295				41,331
Installment payment receivable for sale of CCAL (see note 3)	—				117,384

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