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Financial Instruments (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Long Term Debt Percentage Bearing Fixed Interest Percentage | 79.00% |  |
Gain/Loss on FX Effectiveness |  | $ 0 |
Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months | $ 2,700 |  |
Designated as Hedging Instrument [Member] | June 2019 4 YR Cross Currency Swap [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Amount of Hedged Item | $ 50,000 |  |
Derivative, Fixed Interest Rate | 0.82% |  |
Designated as Hedging Instrument [Member] | June 2019 2 YR Cross Currency Swap [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Amount of Hedged Item | $ 50,000 |  |
Derivative, Fixed Interest Rate | 0.95% |  |
Designated as Hedging Instrument [Member] | February 2019 Cross Currency Swap [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Amount of Hedged Item | $ 50,000 |  |
Derivative, Fixed Interest Rate | 0.78% |  |
Designated as Hedging Instrument [Member] | 2017 Cross Currency Swap [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Amount of Hedged Item | $ 100,000 |  |
Derivative, Fixed Interest Rate | 0.01% |  |
Designated as Hedging Instrument [Member] | 2.25% $100 Million Interest Rate Swap [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Amount of Hedged Item | $ 100,000 |  |
Derivative, Fixed Interest Rate | 2.25% |  |
Designated as Hedging Instrument [Member] | 2.52% $50 Million Interest Rate Swap [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Amount of Hedged Item | $ 50,000 |  |
Derivative, Fixed Interest Rate | 2.52% |  |
Gain/Loss on IR Effectiveness | $ 0 | 0 |
Designated as Hedging Instrument [Member] | Cross Currency Swap [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain/Loss on FX Effectiveness | 0 |  |
Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Amount of Hedged Item | 494,600 | 436,700 |
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments | $ 3,700 | $ 1,200 | $ 9,400

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- Definition The percentage of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate. + References No definition available. + Details
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