6. Lease Revenue

The components of data center, office, light-industrial, and other lease revenue were as follows (in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Lease revenue:
Minimum lease revenue	$	98,294	$	88,323	$	291,488	$	259,537
Variable lease revenue		23,185		18,544		62,075		50,300
Total lease revenue	$	121,479	$	106,867	$	353,563	$	309,837

The future minimum lease payments to be received under noncancelable data center, office, light-industrial, and other operating leases in effect at September 30, 2018, are as follows (in thousands):


Period / Year Ending December 31,	Lease Payments
2018	$	87,868
2019		293,440
2020		201,259
2021		149,168
2022		104,563
Thereafter		188,149
Total	$	1,024,447