Investments - Summary of Gross Real Estate and Loan Activity (Details)
$ in Thousands |
12 Months Ended |
|
Dec. 31, 2018
USD ($)
Property
|
Dec. 31, 2017
USD ($)
Property
|
| Number of Properties |
|
|
| Beginning balance (in properties) | Property |
2,480
|
2,615
|
| Acquisitions/improvements (in properties) | Property |
23
|
59
|
| Dispositions of real estate (in properties) | Property |
(57)
|
(192)
|
| Principal payments and payoffs (in properties) | Property |
(31)
|
(2)
|
| Impairments (in properties) | Property |
0
|
0
|
| Write-off of gross lease intangibles (in properties) | Property |
0
|
0
|
| Loan premium amortization and other (in properties) | Property |
0
|
0
|
| Spin-off to SMTA (in properties) | Property |
(901)
|
|
| Ending balance (in properties) | Property |
1,514
|
2,480
|
| Dollar Amount of Investments |
|
|
| Beginning balance |
$ 7,903,025
|
$ 8,247,654
|
| Acquisitions/improvements |
346,873
|
350,066
|
| Dispositions of real estate |
(126,961)
|
(510,863)
|
| Principal payments and payoffs |
(30,863)
|
(7,878)
|
| Impairments |
(17,668)
|
(102,330)
|
| Write-off of gross lease intangibles |
(54,820)
|
(67,139)
|
| Loan premium amortization and other |
(3,015)
|
(6,485)
|
| Spin-off to SMTA |
(2,892,940)
|
|
| Ending balance |
5,123,631
|
$ 7,903,025
|
| Accumulated depreciation and amortization |
(727,533)
|
|
| Net balance, December 31, 2018 |
$ 4,396,098
|
|
| Owned Properties |
|
|
| Number of Properties |
|
|
| Beginning balance (in properties) | Property |
2,392
|
2,541
|
| Acquisitions/improvements (in properties) | Property |
21
|
43
|
| Dispositions of real estate (in properties) | Property |
(52)
|
(192)
|
| Principal payments and payoffs (in properties) | Property |
0
|
0
|
| Impairments (in properties) | Property |
0
|
0
|
| Write-off of gross lease intangibles (in properties) | Property |
0
|
0
|
| Loan premium amortization and other (in properties) | Property |
0
|
0
|
| Spin-off to SMTA (in properties) | Property |
(899)
|
|
| Ending balance (in properties) | Property |
1,462
|
2,392
|
| Dollar Amount of Investments |
|
|
| Beginning balance |
$ 7,823,058
|
$ 8,181,076
|
| Acquisitions/improvements |
308,985
|
326,766
|
| Dispositions of real estate |
(126,961)
|
(510,863)
|
| Principal payments and payoffs |
0
|
0
|
| Impairments |
(17,668)
|
(101,941)
|
| Write-off of gross lease intangibles |
(54,820)
|
(67,139)
|
| Loan premium amortization and other |
(955)
|
(4,841)
|
| Spin-off to SMTA |
(2,855,052)
|
|
| Ending balance |
5,076,587
|
$ 7,823,058
|
| Accumulated depreciation and amortization |
(727,533)
|
|
| Net balance, December 31, 2018 |
$ 4,349,054
|
|
| Financed Properties |
|
|
| Number of Properties |
|
|
| Beginning balance (in properties) | Property |
88
|
74
|
| Acquisitions/improvements (in properties) | Property |
2
|
16
|
| Dispositions of real estate (in properties) | Property |
(5)
|
0
|
| Principal payments and payoffs (in properties) | Property |
(31)
|
(2)
|
| Impairments (in properties) | Property |
0
|
0
|
| Write-off of gross lease intangibles (in properties) | Property |
0
|
0
|
| Loan premium amortization and other (in properties) | Property |
0
|
0
|
| Spin-off to SMTA (in properties) | Property |
(2)
|
|
| Ending balance (in properties) | Property |
52
|
88
|
| Dollar Amount of Investments |
|
|
| Beginning balance |
$ 79,967
|
$ 66,578
|
| Acquisitions/improvements |
37,888
|
23,300
|
| Dispositions of real estate |
0
|
0
|
| Principal payments and payoffs |
(30,863)
|
(7,878)
|
| Impairments |
0
|
(389)
|
| Write-off of gross lease intangibles |
0
|
0
|
| Loan premium amortization and other |
(2,060)
|
(1,644)
|
| Spin-off to SMTA |
(37,888)
|
|
| Ending balance |
47,044
|
$ 79,967
|
| Accumulated depreciation and amortization |
0
|
|
| Net balance, December 31, 2018 |
$ 47,044
|
|