Investments - Operating Lease Income (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2019 |
Jun. 30, 2018 |
|
| Lessor, Lease, Description [Line Items] | ||||
| Base cash rent | $ 98,418 | $ 195,217 | ||
| Variable cash rent (including reimbursables) | 2,942 | 6,580 | ||
| Straight-line rent, net of bad debt expense | 4,485 | 7,392 | ||
| Amortization of above- and below- market lease intangibles, net | 661 | 1,384 | ||
| Total rental income | 106,506 | 210,573 | ||
| In-place leases | ||||
| Lessor, Lease, Description [Line Items] | ||||
| Leases amortization expenses | $ 6,500 | $ 8,700 | $ 13,200 | $ 18,700 |
| Continuing and discontinuing operations | ||||
| Lessor, Lease, Description [Line Items] | ||||
| Base cash rent | 129,388 | 279,835 | ||
| Variable cash rent (including reimbursables) | 3,591 | 9,121 | ||
| Straight-line rent, net of bad debt expense | 4,187 | 9,087 | ||
| Amortization of above- and below- market lease intangibles, net | 1,219 | 2,372 | ||
| Total rental income | $ 138,385 | $ 300,415 | ||