Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2016

Supplemental Cash Flow Elements [Abstract]

Supplemental cash flow information

Supplemental cash flow information was as follows:

	Years ended December 31,
	2016			2015	2014
	(In thousands)
Interest paid	$	143,990		144,973	139,595
Income taxes paid	14,062			13,379	11,382
Changes in accounts payable related to purchases of revenue earning equipment	(142,256		)	28,134	39,071
Operating and revenue earning equipment acquired under capital leases	1,230			5,959	7,972