Fair Value Measurements Fair Value Measurements - Assets and Liabilities Measured on a Recurring Basis (Details) - Fair Value, Measurements, Recurring $ in Thousands	Dec. 31, 2019 USD ($)
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative liability - other current liabilities	$ 0
Derivative liability - other non-current liabilities	0
Total	0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative liability - other current liabilities	5,943
Derivative liability - other non-current liabilities	6,290
Total	12,233
Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative liability - other current liabilities	0
Derivative liability - other non-current liabilities	0
Total	$ 0