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Leases (Schedule Of Minimum Lease Payments For Finance, Operating, And Sublease Income Leases) (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
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Leases [Abstract] |  |
Finance Leases, Remainder of 2021 | $ 512 |
Finance Leases, 2022 | 642 |
Finance Leases, 2023 | 641 |
Finance Leases, 2024 | 637 |
Finance Leases, 2025 | 618 |
Finance Leases, Thereafter | 2,999 |
Finance Leases, Total minimum lease payments | 6,049 |
Finance Leases, Less amount representing interest | (541) |
Finance Leases, Present value of net minimum lease payments | 5,508 | $ 5,914
Finance Leases, Less current maturities | (578) | (614)
Finance lease obligations, less current maturities | 4,930 | 5,300
Operating Leases, Remainder of 2021 | 2,650 |
Operating Leases, 2022 | 4,653 |
Operating Leases, 2023 | 5,268 |
Operating Leases, 2024 | 4,973 |
Operating Leases, 2025 | 4,160 |
Operating Leases, Thereafter | 38,922 |
Operating Leases, Total minimum lease payments | 60,626 |
Operating Leases, Less amount representing interest | (20,637) |
Operating Leases, Present value of net minimum lease payments | 39,989 | 19,797
Operating Leases, Less current maturities | (1,548) | (5,763)
Operating Leases, Lease liabilities, less current maturities | 38,441 | $ 14,034
Sublease Income, Remainder of 2021 | 275 |
Sublease Income, 2022 | 305 |
Sublease Income, Total minimum lease payments | $ 580 |

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