CASH FLOW INFORMATION
We consider all highly liquid investments with a maturity of three months or less as of the date of purchase to be cash equivalents unless the investments are legally or contractually restricted for more than three months. We had non-cash investing activities of $7.8 million in 2013 related to capital leases associated with our November 2013 acquisitions, and $62.1 million in 2012 related to capital leases and deferred purchase price commitments associated with our December 2012 acquisitions. We also had non-cash investing activities related to other increases in property acquired under capital leases of $10.2 million during 2013, $20.1 million during 2012, and $24.2 million during 2011. We also had accrued purchases of property and equipment of $28.1 million at December 31, 2013, $23.6 million at December 31, 2012, and $17.3 million at December 31, 2011. The effect of non-cash transactions is excluded from the accompanying Consolidated Statements of Cash Flows.
We made interest payments of $136.0 million in 2013, $119.6 million in 2012, and $103.6 million in 2011 including interest on vehicle inventory financing. We made income tax payments, net of income tax refunds, of $200.3 million in 2013, $147.0 million in 2012, and $121.1 million in 2011.
