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Leases (Tables) | 12 Months Ended
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Dec. 31, 2021
Leases |
Summary of lease costs and maturity analysis for liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Lease Costs | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended
(in thousands) | ​ | December 31, 2021 | ​ |  | December 31, 2020 | ​ |  | December 31, 2019
Operating lease cost | $ | 419 | ​ | $ | 419 | ​ | $ | 419
​ | $ | 419 | ​ | $ | 419 | ​ | $ | 419
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other information | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash paid for amounts included in the measurement of lease liabilities | ​ | 429 | ​ | ​ | 421 | ​ | ​ | 412
Weighted average remaining lease terms in years - operating leases | ​ | 2.75 | ​ | ​ | 3.75 | ​ | ​ | 4.75
Weighted average discount rate - operating leases | ​ | 3.86% | ​ | ​ | 3.86% | ​ | ​ | 3.86%
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Maturity analysis for liabilities | Total |  | ​ | ​ |  | ​ | ​
​ | Undiscounted | ​ | ​ | ​ | ​ | ​ | ​
(in thousands) | Cash Flows | ​ | ​ | ​ | ​ | ​ | ​
Discount rate at commencement | ​ | 3.86% | ​ | ​ | ​ | ​ | ​ | ​
2022 | ​ | 438 | ​ | ​ | ​ | ​ | ​ | ​
2023 | ​ | 447 | ​ | ​ | ​ | ​ | ​ | ​
2024 | ​ | 340 | ​ | ​ | ​ | ​ | ​ | ​
​ | $ | 1,225 | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Present value lease liability | $ | 1,159 | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Difference between undiscounted cash flows and discounted cash flows | $ | 66 | ​ | ​ | ​ | ​ | ​ | ​
Summary of income relating to lease payments and undiscounted cash flows | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Income relating to lease payments: | ​ | ​
​ | ​ | Year Ended
(in thousands) |  | December 31, 2021 | ​ | December 31, 2020 |  | December 31, 2019
Income from leases (1) | ​ | $ | 203,530 | ​ | $ | 242,209 | ​ | $ | 256,250
​ | ​ | $ | 203,530 | ​ | $ | 242,209 | ​ | $ | 256,250
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Undiscounted Cash Flows |  | Year ending | ​ | ​ | ​ | ​ | ​ | ​
(in thousands) | ​ | December 31, | ​ | ​ | ​ | ​ | ​ | ​
2022 | ​ | ​ | 100,269 | ​ | ​ | ​ | ​ | ​ | ​
2023 | ​ | ​ | 103,107 | ​ | ​ | ​ | ​ | ​ | ​
2024 | ​ | ​ | 97,792 | ​ | ​ | ​ | ​ | ​ | ​
2025 | ​ | ​ | 83,596 | ​ | ​ | ​ | ​ | ​ | ​
2026 | ​ | ​ | 70,718 | ​ | ​ | ​ | ​ | ​ | ​
2027 and thereafter | ​ |  | 259,673 | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | $ | 715,155 | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(1) Amounts recognized from variable lease payments were $54,825, $61,310 and $64,421 for the years ended December 31, 2021, 2020 and 2019, respectively. | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

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- Definition Tabular disclosure of components of income from operating lease and maturity of undiscounted cash flows to be received by lessor on annual basis for operating lease. + References No definition available. + Details
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- Definition Tabular disclosure of lessee's lease cost and undiscounted cash flows of of operating lease liability. + References No definition available. + Details
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