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Leases - Maturities of Corporation's Lease Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Operating leases
2021	$ 1,172
2022	670
2023	460
2024	161
2025	122
Thereafter	17
Total	2,602
Imputed interest	(114)
Lease liabilities	2,488	$ 2,813
Finance leases
2021	61
2022	329
2023	338
2024	346
2025	355
Thereafter	6,373
Total	7,802
Imputed interest	(1,497)
Lease liabilities	$ 6,305

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