Derivative Instruments and Fair Value Measurements - Derivatives by Hedging Relationship and Fair Value Measurements (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Derivatives:
Current assets	$ 0	$ 162
Current assets, counterparty offsets	0	0
Current liabilities	0	(139)
Current liabilities, counterparty offsets	0	0
Net value	0	23
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 Unobservable Inputs (Level 2)
Derivatives:
Current assets	0	162
Current liabilities	0	(139)
Net value	0	23
Significant Unobservable Inputs (Level 3)
Derivatives:
Current assets	0	0
Current liabilities	0	0
Net value	$ 0	$ 0