Leases - Schedule of Lease Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Leases [Abstract]
Operating lease revenues	$ 94,459	$ 71,297	$ 282,747	$ 209,850
Direct financing lease interest income	539	510	1,558	1,513
Gain on sales-type leases	35,166	0	35,166	0
Sales-type lease interest income	1,675	0	1,675	0
Lease revenues relating to variable lease payments not included in measurement of the sales-type lease receivable	$ 3,075	$ 0	$ 3,075	$ 0