Derivative Financial Instruments - Offsetting of Derivative Assets and Liabilities (Details) - Zero Cost Collars [Member] - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Asset Derivatives:
Asset Derivatives, Gross amounts of recognized assets/liabilities	$ 2,020	$ 2,036
Asset Derivatives, Net amounts of assets/liabilities presented in the balance sheets	2,020	2,036
Asset Derivatives, Net amount	$ (40)	2,036
Liability Derivatives:
Liability Derivatives, Gross amounts of recognized liabilities		195
Liability Derivatives, Net amounts of liabilities presented in the balance sheets		195
Liability Derivatives, Net amount after master netting		$ 195