Investments - Summary of Owned Real Estate Activity (Details)
$ in Thousands |
12 Months Ended |
|
Dec. 31, 2020
USD ($)
Property
|
Dec. 31, 2019
USD ($)
Property
|
Dec. 31, 2018
USD ($)
Property
|
| Dollar Amount of Investments |
|
|
|
| Impairments |
$ (59,206)
|
$ (24,130)
|
$ (17,193)
|
| Ending balance |
6,800,000
|
|
|
| Net balance |
$ 5,821,628
|
|
|
| Held in Use |
|
|
|
| Number of Properties |
|
|
|
| Beginning balance (in properties) | Property |
1,750
|
1,459
|
|
| Acquisitions/improvements (in properties) | Property |
146
|
334
|
|
| Dispositions of real estate (in properties) | Property |
(20)
|
(16)
|
|
| Transfers to Held for Sale (in properties) | Property |
(23)
|
(27)
|
|
| Impairments (in properties) | Property |
0
|
0
|
|
| Reset of gross balances (in properties) | Property |
0
|
0
|
|
| Other (in properties) | Property |
0
|
|
|
| Ending balance (in properties) | Property |
1,853
|
1,750
|
1,459
|
| Dollar Amount of Investments |
|
|
|
| Beginning balance |
$ 6,140,775
|
$ 5,054,523
|
|
| Acquisitions |
880,897
|
1,344,843
|
|
| Dispositions |
(53,985)
|
(98,327)
|
|
| Transfers to Held for Sale |
(72,912)
|
(128,396)
|
|
| Impairments |
(70,376)
|
(18,974)
|
|
| Reset of gross balances |
(45,386)
|
(12,894)
|
|
| Other |
(1,340)
|
|
|
| Ending balance |
6,777,673
|
$ 6,140,775
|
$ 5,054,523
|
| Accumulated depreciation and amortization |
(981,866)
|
|
|
| Net balance |
$ 5,795,807
|
|
|
| Held for Sale |
|
|
|
| Number of Properties |
|
|
|
| Beginning balance (in properties) | Property |
2
|
3
|
|
| Acquisitions/improvements (in properties) | Property |
0
|
0
|
|
| Dispositions of real estate (in properties) | Property |
(18)
|
(28)
|
|
| Transfers to Held for Sale (in properties) | Property |
23
|
27
|
|
| Impairments (in properties) | Property |
0
|
0
|
|
| Reset of gross balances (in properties) | Property |
0
|
0
|
|
| Other (in properties) | Property |
0
|
|
|
| Ending balance (in properties) | Property |
7
|
2
|
3
|
| Dollar Amount of Investments |
|
|
|
| Beginning balance |
$ 1,223
|
$ 22,064
|
|
| Acquisitions |
0
|
0
|
|
| Dispositions |
(32,028)
|
(140,909)
|
|
| Transfers to Held for Sale |
72,912
|
128,396
|
|
| Impairments |
(11,100)
|
(5,117)
|
|
| Reset of gross balances |
(3,243)
|
(3,211)
|
|
| Ending balance |
$ 27,764
|
1,223
|
$ 22,064
|
| Accumulated depreciation and amortization |
|
(1,943)
|
|
| Net balance |
|
$ 25,821
|
|
| Total |
|
|
|
| Number of Properties |
|
|
|
| Beginning balance (in properties) | Property |
1,752
|
1,462
|
|
| Acquisitions/improvements (in properties) | Property |
146
|
334
|
|
| Dispositions of real estate (in properties) | Property |
(38)
|
(44)
|
|
| Transfers to Held for Sale (in properties) | Property |
0
|
0
|
|
| Impairments (in properties) | Property |
0
|
0
|
|
| Reset of gross balances (in properties) | Property |
0
|
0
|
|
| Other (in properties) | Property |
0
|
|
|
| Ending balance (in properties) | Property |
1,860
|
1,752
|
1,462
|
| Dollar Amount of Investments |
|
|
|
| Beginning balance |
$ 6,141,998
|
$ 5,076,587
|
|
| Acquisitions |
880,897
|
1,344,843
|
|
| Dispositions |
(86,013)
|
(239,236)
|
|
| Transfers to Held for Sale |
0
|
0
|
|
| Impairments |
(81,476)
|
(24,091)
|
|
| Reset of gross balances |
(48,629)
|
(16,105)
|
|
| Other |
(1,340)
|
|
|
| Ending balance |
$ 6,805,437
|
6,141,998
|
$ 5,076,587
|
| Accumulated depreciation and amortization |
|
(983,809)
|
|
| Net balance |
|
$ 5,821,628
|
|