Deferred Revenue-Right-to-use contracts and Deferred Commission Expense

12 Months Ended

Dec. 31, 2017

Deferred Revenue Disclosure [Abstract]

Deferred Revenue-Right-to-use contracts and Deferred Commission Expense

Deferred Revenue-entry of right-to-use contracts and Deferred Commission Expense

As of December 31, 2017 and 2016, the components of the change in deferred revenue-entry of right-to-use contracts and deferred commission expense are as follows (amounts in thousands):

	December 31,
	2017			2016
Deferred revenue—upfront payments from right-to-use contracts, as of January 1,	$	81,484		$	78,405
Right-to-use contracts current period, gross	14,132			12,327
Revenue recognized from right-to-use contract upfront payments	(10,020		)	(9,248		)
Right-to-use contract upfront payments, deferred, net	4,112			3,079
Deferred revenue—upfront payments from right-to-use contracts, as of December 31,	$	85,596		$	81,484
Deferred commission expense, as of January 1,	$	31,375		$	30,865
Deferred commission expense	4,577			4,659
Commission expense recognized	(4,509		)	(4,149		)
Net increase in deferred commission expense	68			510
Deferred commission expense, as of December 31,	$	31,443		$	31,375