Derivative Financial Instruments, Cash Deposits (Details) - Zero Cost Collar and Forward Contracts [Member] - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Cash Deposits [Abstract]
Cash deposits	$ 1,000	$ 1,000
NFIK [Member]
Additional Cash Collateral [Abstract]
Threshold amount of cash collateral	500
Threshold additional amount of cash collateral	1,820	1,840
Termination provisions for cash and cash equivalents	30,000
SC [Member]
Cash Deposits [Abstract]
Cash deposits	1,000	1,000
Additional Cash Collateral [Abstract]
Threshold amount of cash collateral	$ 500
Threshold additional amount of cash collateral		$ 100