Commitments and Contingencies

Operating Lease Commitments

The Company leases office space under non-cancellable operating leases for its corporate headquarters in Austin, Texas in two adjacent buildings under separate lease agreements, pursuant to the first of which the Company leases approximately 67 square feet of office space with an initial term that expires on April 30, 2021, with the option to extend the lease for an additional five-year term, and pursuant to the second of which the Company leases approximately 129 square feet of office space with an initial term that expires on April 30, 2028, with the option to extend the lease for an additional ten-year term. The Company also leases office space in: Lincoln, Nebraska; Des Moines, Iowa; Atlanta, Georgia; Asheville, North Carolina; and, south Austin, Texas. The Company believes its current facilities will be adequate for its needs for the foreseeable future. Rent expense under operating leases was $4.4 million, $3.7 million and $1.8 million for the years ended December 31, 2017, 2016 and 2015, respectively.

Future minimum payments required under operating leases that have initial or remaining non-cancelable lease terms in excess of one year at December 31, 2017 were as follows:



	Operating Leases
Year Ended December 31,
2018	$	5,675
2019	5,692
2020	5,694
2021	4,781
2022	4,296
Thereafter	20,442
Total minimum lease payments	$	46,580

Contractual Commitments

The Company has non-cancelable contractual commitments related to third-party products, co-location fees and other product costs. The Company is party to several purchase commitments for third-party products that contain both a contractual minimum obligation and a variable obligation based upon usage or other factors which can change on a monthly basis. The estimated amounts for usage and other factors are not included within the table below. Future minimum contractual commitments that have initial or remaining non-cancelable terms in excess of one year were as follows:



	Contractual Commitments
Year Ended December 31,
2018	$	13,227
2019	11,060
2020	7,413
2021	7,355
2022	7,355
Thereafter	5,517
Total commitments	$	51,927

Legal Proceedings

From time to time, the Company may become involved in legal proceedings arising in the ordinary course of its business. The Company is not presently a party to any legal proceedings that, if determined adversely to the Company, would have a material adverse effect on the Company.