Property and Equipment

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment [Abstract]

5.	PROPERTY AND EQUIPMENT

Property and equipment at cost consisted of the following as of December 31, 2015 and 2014:


	December 31,
(Amounts in thousands)	2015		2014
Land and improvements	$	5,445	$	7,548
Buildings		71,926		108,784
Telephone and computer equipment		840,396		790,254
Office furniture and equipment		37,094		33,133
Leasehold improvements		59,384		53,023
Construction in progress		39,433		53,027

	$	1,053,678	$	1,045,769

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 $36.7 million, $33.2 million and $31.1 million for the years ended December 31, 2015, 2014 and 2013, 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:


(Amounts in thousands)	Total Operating Leases
Year Ending December 31,	Total Operating Leases
2016	$	23,330
2017		20,656
2018		17,230
2019		14,474
2020		10,928
2021 and thereafter		42,568

Total minimum obligations	$	129,186