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Leases (Tables) | 6 Months Ended
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Jun. 30, 2019
Leases |
Summary of lease costs | ​
​ | ​ | ​ | ​
Lease Costs |  | For the
​ | ​ | Six Months Ended
(in thousands) | ​ | June 30, 2019
Operating lease cost | ​ | $ | 209
​ | ​ | $ | 209
​ | ​ | ​ | ​
Other information | ​ | ​ | ​
Cash paid for amounts included in the measurement of lease liabilities | ​ | $ | 205
Weighted average remaining lease terms in years - operating leases | ​ | ​ | 5.25
Weighted average discount rate - operating leases | ​ | ​ | 3.86%
​ | ​ | ​ | ​
Maturity analysis for liabilities |  | Total
​ | ​ | Undiscounted
(in thousands) | ​ | Cash Flows
Discount rate at commencement | ​ | ​ | 3.86%
Remainder of 2019 | ​ | $ | 207
2020 | ​ | ​ | 421
2021 | ​ | ​ | 429
2022 | ​ | ​ | 438
2023 | ​ | ​ | 447
2024 and thereafter | ​ |  | 340
​ | ​ | $ | 2,282
​ | ​ | ​ | ​
Present value lease liability | ​ | $ | 2,059
​ | ​ | ​ | ​
Difference between undiscounted cash flows and discounted cash flows | ​ | $ | 223
Summary of maturity analysis for liabilities | ​
Summary of income relating to lease payments | ​
​ | ​ | ​ | ​
Income relating to lease payments: |  | For the
​ | ​ | Six Months Ended
(in thousands) | ​ | June 30, 2019
Income from leases (1) | ​ | $ | 123,821
​ | ​ | $ | 123,821
​ | ​ | ​ | ​
Undiscounted Cash Flows |  | Year ending
(in thousands) | ​ | December 31,
Remainder of 2019 | ​ | $ | 85,662
2020 | ​ | ​ | 170,226
2021 | ​ | ​ | 159,589
2022 | ​ | ​ | 133,796
2023 | ​ | ​ | 117,753
2024 and thereafter | ​ |  | 376,076
​ | ​ | $ | 1,043,102
​ | ​ | ​ | ​
(1) Amount from variable lease payments $32,085 | ​ | ​ | ​
Summary of undiscounted cash flows | ​

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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 + Details
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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980 + Details
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- Definition Tabular disclosure of maturity of undiscounted cash flows to be received by lessor on annual basis for operating lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=119202524&loc=SL77919396-209981 + Details
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- Definition Tabular disclosure of components of income from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=119202524&loc=SL77919372-209981 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 6A -URI http://asc.fasb.org/extlink&oid=118952077&loc=SL77927221-108306 + Details
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