NOTE M — LEASES

Rent expense under operating leases was approximately $48.1 million, $50.1 million, and $50.1 million, for the years ended December 31, 2016, 2015 and 2014, respectively, which was included within “Other operating costs” and “General and administrative expenses” in our consolidated statements of operations and comprehensive (loss) income. Sublease rental income is not material. The net book value of office equipment under capital leases was approximately $0.8 million and $1.1 million at December 31, 2016 and 2015, respectively. Equipment capital lease obligations are included in long-term debt as a part of “Financing leases and other” in Note N - “Long-Term Debt.”

Future minimum rental payments, by year and in the aggregate, under operating and financing obligations with terms of one year or more at December 31, 2016 are as follows:

(in thousands)	Operating Leases		Capital Leases

2017	$	39,581	$	467
2018	32,507		268
2019	25,192		121
2020	17,226		39
2021	11,556		—
Thereafter	16,147		—

Total	$	142,209	$	895

Future minimum rental payments, by year and in the aggregate, under operating and financing obligations with terms of one year or more at December 31, 2015 are as follows:

(in thousands)	Operating Leases		Capital Leases

2016	$	39,001	$	489
2017	32,276		411
2018	26,081		188
2019	19,486		41
2020	12,607		—
Thereafter	21,826		—

Total	$	151,277	$	1,129