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Derivative Financial Instruments (Narrative) (Details) $ in Thousands | Sep. 30, 2020 agreement | Sep. 28, 2020 USD ($) agreement
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Derivative [Line Items] |  |
Number of interest rate swap agreements | agreement | 10 |
Interest Rate Swap [Member] |  |
Derivative [Line Items] |  |
Number of derivatives terminated | agreement |  | 4
Payments to terminate derivative |  | $ 853
Interest Rate Swap Terminated One [Member] |  |
Derivative [Line Items] |  |
Notional amount |  | 150,000
Interest Rate Swap Terminated Two [Member] |  |
Derivative [Line Items] |  |
Notional amount |  | 150,000
Interest Rate Swap Terminated Three [Member] |  |
Derivative [Line Items] |  |
Notional amount |  | 50,000
Interest Rate Swap Terminated Four [Member] |  |
Derivative [Line Items] |  |
Notional amount |  | $ 50,000

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