Property and Equipment

12 Months Ended

Dec. 31, 2016

Property Plant And Equipment [Abstract]

Property and Equipment

5. PROPERTY AND EQUIPMENT

Property and equipment at cost consisted of the following as of December 31, 2016 and 2015:

	December 31,
(Amounts in thousands)	2016		2015
Land and improvements	$	5,531	$	5,445
Buildings		73,424		71,926
Telephone and computer equipment		862,352		840,396
Office furniture and equipment		37,043		37,094
Leasehold improvements		57,057		59,384
Construction in progress		52,798		39,433
	$	1,088,205	$	1,053,678

We lease certain land, buildings and equipment under operating leases which expire at varying dates through December 2029. Rent expense on operating leases was approximately $37.9 million, $36.7 million and $33.2 million for the years ended December 31, 2016, 2015 and 2014, respectively. On all real estate leases, we pay real estate taxes, insurance and maintenance associated with the leased sites. Certain of the leases offer extension options ranging from month-to-month to five years.

Future minimum payments under non-cancelable operating leases with initial or remaining terms of one year or more are as follows:

	Total
(Amounts in thousands)	Operating
Year Ending December 31,	Leases
2017	$	23,954
2018		20,676
2019		17,206
2020		13,470
2021		8,211
2022 and thereafter		43,526
Total minimum obligations	$	127,043