Investments - Operating Lease Income (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Lessor, Lease, Description [Line Items]        
Base Cash Rent $ 173,569 $ 162,467 $ 516,486 $ 471,052
Variable cash rent (including reimbursables) 6,331 6,479 18,385 19,713
Straight-line rent, net of uncollectible reserve 8,227 10,875 26,127 28,465
Amortization of above- and below- market lease intangibles, net 78 475 767 1,700
Total rental income 188,205 180,296 561,765 520,930
Base cash rent amounts (reserved) (300) (600) (400) (500)
Straight-line rent amounts (reserved)/recovered (2,100) 1,200 (4,100) 1,100
In-place leases        
Lessor, Lease, Description [Line Items]        
Leases amortization expenses $ 10,700 $ 11,300 $ 32,700 $ 32,600