Fair Value of Financial Instruments and Derivatives Instruments - Valuation of Company's Financial Instruments (Details) - Fair Value, Inputs, Level 2 - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative instruments – asset position	$ 2,771	$ 153
Derivative instruments – liability position	$ 657	$ 1,978

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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