COMMITMENTS AND CONTINGENCIES

12 Months Ended

Dec. 31, 2016

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES

As of December 31, 2016, we have known contractual obligations, commitments and contingencies of approximately $18.0 million related to our operating lease obligations.

(in thousands)	Payment due by period
	Total		Less than 1 year		1-3 years		3-5 years		More than 5 years
Contractual obligations
Operating leases	$	18,020	$	1,185	$	2,281	$	2,286	$	12,268
Total	$	18,020	$	1,185	$	2,281	$	2,286	$	12,268

 Leases

See Note 9 for a detailed description of our lease arrangements. Total rental expense was approximately $1.6 million, $0.3 million and $0.1 million for the years ended December 31, 2016, 2015 and 2014, respectively.

Future minimum lease commitments as of December 31, 2016, in the aggregate total approximately $18.0 million through December 31, 2031. The preceding table shows future minimum lease commitments, which include our office leases in New York, North Carolina and Tennessee, by period as of December 31, 2016.