Derivative Instruments Fair Value and Offsets Table (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Derivative, Collateral, Right to Reclaim Cash	$ 2,000
Derivative Asset, Fair Value, Gross Asset	1,312	$ 2,576
Derivative Asset, Fair Value, Gross Liability	(891)	(2,171)
Derivative Asset, Fair Value, Amount Offset Against Collateral	421	405
Derivative Liability, Fair Value, Gross Liability	4,813	3,017
Derivative Liability, Fair Value, Gross Asset	(2,868)	(2,171)
Derivative Liability, Fair Value, Amount Offset Against Collateral	1,945	846
Financial Swaps | Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	14	2,426
Derivative Asset, Fair Value, Gross Liability	0	(2,034)	[1]
Derivative Asset, Fair Value, Amount Offset Against Collateral	14	392
Derivative Liability, Fair Value, Gross Liability	0	2,034
Derivative Liability, Fair Value, Gross Asset	0	(2,034)
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	0
Financial Swaps | Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	891	134
Derivative Asset, Fair Value, Gross Liability	(891)	(134)
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Derivative Liability, Fair Value, Gross Liability	4,812	924
Derivative Liability, Fair Value, Gross Asset	(2,868)	(134)
Derivative Liability, Fair Value, Amount Offset Against Collateral	1,944	790
Financial Swaps | Other Assets
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	407	3
Derivative Asset, Fair Value, Gross Liability	0	(3)
Derivative Asset, Fair Value, Amount Offset Against Collateral	407	0
Derivative Liability, Fair Value, Gross Liability	0	27
Derivative Liability, Fair Value, Gross Asset	0	(3)
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	24
Forward contracts | Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset		13
Derivative Asset, Fair Value, Gross Liability		0
Derivative Asset, Fair Value, Amount Offset Against Collateral		13
Derivative Liability, Fair Value, Gross Liability		0
Derivative Liability, Fair Value, Gross Asset		0
Derivative Liability, Fair Value, Amount Offset Against Collateral		0
Forward contracts | Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Asset, Fair Value, Gross Liability	0	0
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Derivative Liability, Fair Value, Gross Liability	1	32
Derivative Liability, Fair Value, Gross Asset	0	0
Derivative Liability, Fair Value, Amount Offset Against Collateral	$ 1	$ 32

[1] Current liability derivative amounts offset include $2.0 million of collateral receivable for the period ended March 31, 2020.