Derivative Instruments and Fair Value Measurements - Fair Value Measurements (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Derivatives:
Current assets	$ 1,255	$ 61
Current assets, counterparty offsets	0	0
Current liabilities	(1,221)	(52)
Current liabilities, counterparty offsets	0	0
Net value	34	9
Net value, counterparty offsets	0	0
Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1)
Derivatives:
Current assets	0	0
Current liabilities	0	0
Net value	0	0
Significant Other Observable Inputs (Level 2)
Derivatives:
Current assets	1,255	61
Current liabilities	(1,221)	(52)
Net value	34	9
Significant Unobservable Inputs (Level 3)
Derivatives:
Current assets	0	0
Current liabilities	0	0
Net value	$ 0	$ 0