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Commitments and Contingencies (Other Commitments) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract] |  |  |
Operating lease expense | $ 5,400 | $ 4,400 |
Operating lease expense |  |  | $ 5,000
Operating |  |  |
Year one | 3,797 | 4,167 |
Year two | 6,756 | 1,803 |
Year three | 6,393 | 1,098 |
Year four | 6,309 | 728 |
Year five | 6,297 | 617 |
Thereafter | 496 | 1,447 |
Total undiscounted cash flows | 30,048 | 9,860 |
Present value discount | (3,771) | (1,057) |
Other adjustments | 23,795 | 25,379 |
Lease liabilities | 50,072 | 34,182 |
Finance |  |  |
Year one | 5,494 | 5,386 |
Year two | 5,604 | 5,494 |
Year three | 5,716 | 5,604 |
Year four | 5,830 | 5,716 |
Year five | 5,946 | 5,830 |
Thereafter | 1,567,826 | 1,573,824 |
Total undiscounted cash flows | 1,596,416 | 1,601,854 |
Present value discount | (1,445,896) | (1,454,105) |
Other adjustments | 0 | 0 |
Lease liabilities | 150,520 | 147,749 |
Operating lease payments made | 4,300 | 4,100 |
Finance lease payments made | $ 5,400 | $ 3,300 |
Operating leases, excluding tenant paid leases, weighted average lease term | 5 years 7 months 6 days | 4 years 2 months 12 days |
Operating leases, weighted average incremental borrowing rate, discount rate | 5.00% | 5.60% |
Finance leases, weighted average lease term | 97 years | 93 years |
Finance leases, weighted average rate implicit in the lease, discount rate | 5.50% | 5.40% |

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