Summary of Significant Accounting Policies - Fair Value (Details) - USD ($) $ in Thousands		Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Assets
Net investment in sales-type leases	[1]	$ 2,412,716		$ 1,305,519
Ground Lease receivables	[1]	796,252		577,457
Cash and cash equivalents		29,619	[1]	56,948	[1]	$ 22,704
Restricted cash		8,897	[1]	39,519	[1]	$ 24,078
Liabilities
Debt obligations, net	[1]	2,697,503		1,684,726
Carrying Value
Assets
Net investment in sales-type leases		2,413,000		1,306,000
Ground Lease receivables		796,000		577,000
Cash and cash equivalents		30,000		57,000
Restricted cash		9,000		40,000
Liabilities
Debt obligations, net		2,698,000		1,685,000
Carrying Value | Fair Value, Inputs, Level 1
Liabilities
Debt obligations, net		738,000
Carrying Value | Fair Value, Inputs, Level 3
Liabilities
Debt obligations, net		1,960,000		1,685,000
Fair Value
Assets
Net investment in sales-type leases		2,704,000		1,306,000
Ground Lease receivables		893,000		577,000
Cash and cash equivalents		30,000		57,000
Restricted cash		9,000		40,000
Liabilities
Debt obligations, net		2,859,000		1,835,000
Fair Value | Fair Value, Inputs, Level 1
Liabilities
Debt obligations, net		741,000
Fair Value | Fair Value, Inputs, Level 3
Liabilities
Debt obligations, net		$ 2,118,000		$ 1,835,000

[1] Refer to Note 2 for details on the Company’s consolidated variable interest entities ("VIEs").