7. Leases (Tables)

3 Months Ended

Mar. 31, 2019

Leases [Abstract]

Schedule of operating lease cost and related information

The following table presents certain quantitative information related to our lease arrangements for the three months ended March 31, 2019 and as of March 31, 2019 (in thousands):

	Three Months Ended March 31, 2019
Operating lease cost	$	5,283
Variable lease cost	749
Short-term lease cost	2,842
Total lease cost	$	8,874
Payments of amounts included in the measurement of operating lease liabilities	$	4,947
Lease assets obtained in exchange for operating lease liabilities	$	149,631
	March 31, 2019
Weighted-average remaining lease term	18 years
Weighted-average discount rate	4.7		%

Operating lease liability maturity

As of March 31, 2019, the future payments associated with our lease liabilities were as follows (in thousands):

	Total Lease Liabilities
Remainder of 2019	$	13,838
2020	14,436
2021	13,656
2022	13,255
2023	13,000
Thereafter	151,562
Total future payments	219,747
Less: interest	(74,460		)
Total lease liabilities	$	145,287