Annual report pursuant to Section 13 and 15(d)

Derivative Instruments and Hedging Activities - Effects on statements of income and consolidated statements of comprehensive income (Details)

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Derivative Instruments and Hedging Activities - Effects on statements of income and consolidated statements of comprehensive income (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of (gain) loss recognized in net income $ 240 $ (705) $ (1,068)
Designated as Hedging Instrument | Other expenses, net | Interest rate swap contracts      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of (gain) loss recognized in net income 2,086 1,455 71
Not Designated as Hedging Instrument | Other expenses, net | Interest rate swap contracts      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of (gain) loss recognized in net income (996) 51 56
Not Designated as Hedging Instrument | Other expenses, net | Commodity swap contracts      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of (gain) loss recognized in net income 2,325 (165) (234)
Not Designated as Hedging Instrument | Other expenses, net | Make-whole provisions      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of (gain) loss recognized in net income $ (1,089) $ (591) $ (890)