15. Commitments and Contingencies Leases The Company leases facilities and equipment from unrelated parties under operating leases. Minimum future lease obligations on long-term non-cancelable operating leases in effect at December 31, 2015 are approximately as follows (in thousands): Select Concentra Total (in thousands) 2016 $ 145,185 $ 59,845 $ 205,030 2017 122,606 53,518 176,124 2018 99,873 44,688 144,561 2019 79,002 36,485 115,487 2020 61,462 30,098 91,560 Thereafter 348,222 61,501 409,723 ? ? ? ? ? ? ? ? ? ? ? $ 856,350 $ 286,135 $ 1,142,485 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Total rent expense for operating leases, including cancelable leases, for the years ended December 31, 2013, 2014 and 2015 was $164.6 million, $169.1 million, and $212.9 million (including $34. 9 million for Concentra), respectively. Property rent expense to unrelated parties for the years ended December 31, 2013, 2014 and 2015 was $119.5 million, $124.4 million, and $163.4 million (including $32.9 million for Concentra), respectively. Construction Commitments At December 31, 2015, the Company had outstanding commitments under construction contracts related to new construction, improvements and renovations at the Company's long term acute care properties and inpatient rehabilitation facilities, and Concentra facilities totaling approximately $15.7 million. Other A subsidiary of the Company has entered into a naming, promotional and sponsorship agreement with an NFL team for the team's headquarters complex that requires a payment of $3.1 million in 2016. Each successive annual payment increases by 2.3% through 2025. The naming, promotional and sponsorship agreement is in effect until 2025. Litigation The Company is a party to various legal actions, proceedings and claims (some of which are not insured), and regulatory and other governmental audits and investigations in the ordinary course of its business. The Company cannot predict the ultimate outcome of pending litigation, proceedings and regulatory and other governmental aud