Investments - Summary of Owned Real Estate Activity (Details)
$ in Thousands |
3 Months Ended |
|
|
Mar. 31, 2019
USD ($)
Property
|
Dec. 31, 2018
USD ($)
|
| Number of Properties |
|
|
| Ending balance (in properties) | Property |
1,528
|
|
| Dollar Amount of Investments |
|
|
| Acquisitions |
$ 0
|
|
| Dispositions |
0
|
|
| Ending balance |
5,300,000
|
|
| Accumulated depreciation and amortization |
(636,780)
|
$ (621,456)
|
| Net balance |
$ 4,458,464
|
|
| Held in Use |
|
|
| Number of Properties |
|
|
| Beginning balance (in properties) | Property |
1,459
|
|
| Acquisitions/improvements (in properties) | Property |
22
|
|
| Dispositions of real estate (in properties) | Property |
(6)
|
|
| Transfers to Held for Sale (in properties) |
(15)
|
|
| Transfers from Held for Sale (in properties) |
0
|
|
| Impairments (in properties) | Property |
0
|
|
| Write-off of gross lease intangibles (in properties) | Property |
0
|
|
| Ending balance (in properties) | Property |
1,460
|
|
| Dollar Amount of Investments |
|
|
| Beginning Balance |
$ 5,054,524
|
|
| Acquisitions |
179,842
|
|
| Dispositions |
(19,229)
|
|
| Transfers to Held for Sale |
(107,723)
|
|
| Transfers from Held for Sale |
0
|
|
| Impairments |
334
|
|
| Write-off of gross lease intangibles |
(2,431)
|
|
| Ending balance |
5,105,317
|
|
| Accumulated depreciation and amortization |
(636,780)
|
|
| Real Estate Investment Property, Accumulated Amortization |
(104,412)
|
|
| Net balance |
$ 4,364,125
|
|
| Held for Sale |
|
|
| Number of Properties |
|
|
| Beginning balance (in properties) | Property |
3
|
|
| Acquisitions/improvements (in properties) | Property |
0
|
|
| Dispositions of real estate (in properties) | Property |
(1)
|
|
| Transfers to Held for Sale (in properties) |
15
|
|
| Transfers from Held for Sale (in properties) |
0
|
|
| Impairments (in properties) | Property |
0
|
|
| Write-off of gross lease intangibles (in properties) | Property |
0
|
|
| Ending balance (in properties) | Property |
17
|
|
| Dollar Amount of Investments |
|
|
| Beginning Balance |
$ 22,064
|
|
| Acquisitions |
0
|
|
| Dispositions |
(12,669)
|
|
| Transfers to Held for Sale |
107,723
|
|
| Transfers from Held for Sale |
0
|
|
| Impairments |
(4,026)
|
|
| Write-off of gross lease intangibles |
0
|
|
| Ending balance |
113,092
|
|
| Accumulated depreciation and amortization |
(14,665)
|
|
| Real Estate Investment Property, Accumulated Amortization |
(4,088)
|
|
| Net balance |
$ 94,339
|
|
| Total |
|
|
| Number of Properties |
|
|
| Beginning balance (in properties) | Property |
1,462
|
|
| Acquisitions/improvements (in properties) | Property |
22
|
|
| Dispositions of real estate (in properties) | Property |
(7)
|
|
| Transfers to Held for Sale (in properties) |
0
|
|
| Transfers from Held for Sale (in properties) |
0
|
|
| Impairments (in properties) | Property |
0
|
|
| Write-off of gross lease intangibles (in properties) | Property |
0
|
|
| Ending balance (in properties) | Property |
1,477
|
|
| Dollar Amount of Investments |
|
|
| Beginning Balance |
$ 5,076,588
|
|
| Acquisitions |
179,842
|
|
| Dispositions |
(31,898)
|
|
| Transfers to Held for Sale |
0
|
|
| Transfers from Held for Sale |
0
|
|
| Impairments |
(3,692)
|
|
| Write-off of gross lease intangibles |
(2,431)
|
|
| Ending balance |
5,218,409
|
|
| Accumulated depreciation and amortization |
(651,445)
|
|
| Real Estate Investment Property, Accumulated Amortization |
(108,500)
|
|
| Net balance |
$ 4,458,464
|
|