Lease Commitments

12 Months Ended

Dec. 31, 2017

We conduct business on premises leased in various locations under long-term operating leases expiring at various dates through 2060. For the years ended December 31, 2017, 2016, and 2015, net rental expense under our operating leases was $18.7 million, $18.4 million, and $17.5 million, respectively, which was recorded within General and Administrative Expenses in our Consolidated Income Statements. Future minimum lease payments due under non-cancellable operating leases in effect at December 31, 2017 were as follows (in thousands of dollars):



2018	$	19,196
2019	17,086
2020	15,566
2021	11,742
2022	9,425
Thereafter	29,672
Total future minimum lease payments	$	102,687

The future minimum lease payments in the table above exclude future minimum sublease rental receipts of $13.2 million owed to us under noncancellable subleases. In addition to the operating lease payments in the table above, under the terms of certain leases, we are required to pay real estate taxes and utility costs and may be subject to escalations in the amount of future minimum lease payments based on certain contractual provisions.