Supplemental Cash Flow Information (Tables)

6 Months Ended

Jun. 30, 2013

Supplemental Cash Flow Elements [Abstract]

Supplemental cash flow information

Supplemental cash flow information was as follows:

	Six months ended June 30,
	2013		2012
	(In thousands)
Interest paid	$	67,545	64,060
Income taxes paid	$	8,447	6,644
Changes in accounts payable related to purchases of revenue earning equipment	$	40,389	112,990
Operating and revenue earning equipment acquired under capital leases	$	4,814	616