Derivative Instruments (Tables)

9 Months Ended

Sep. 30, 2021

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value

The fair value of all derivatives is recorded as assets or liabilities on a gross basis in our Condensed Consolidated Balance Sheets. As of September 30, 2021 and December 31, 2020, the fair value of our derivatives and their respective balance sheet locations are presented in the following tables:

	Asset Derivatives			Liability Derivatives
	Location	Fair  Value		Location	Fair  Value
As of September 30, 2021	(Dollars in thousands)
Derivatives designated as cash flow hedges:
Commodity derivative contracts	Prepaid and other current assets	$	12,322	Other accrued liabilities	$	—
	Other long-term assets	—		Other long-term obligations	—
Interest rate swap contracts	Prepaid and other current assets	—		Other accrued liabilities	848
	Other long-term assets	2,510		Other long-term obligations	—
Total fair value		$	14,832		$	848
As of December 31, 2020
Derivatives designated as cash flow hedges:
Commodity derivative contracts	Prepaid and other current assets	$	518	Other accrued liabilities	$	888
	Other long-term assets	63		Other long-term obligations	1,898
Interest rate swap contracts	Prepaid and other current assets	—		Other accrued liabilities	4,080
	Other long-term assets	—		Other long-term obligations	6,903
Total fair value		$	581		$	13,769

	Asset Derivatives			Liability Derivatives
	Location	Fair  Value		Location	Fair  Value
As of September 30, 2021	(Dollars in thousands)
Derivatives not designated as hedges:
Foreign currency derivatives	Prepaid and other current assets	$	43	Other accrued liabilities	$	1,077
Commodity derivative contracts	Prepaid and other current assets	$	724	Other accrued liabilities	$	—
Total fair value		$	767		$	1,077
As of December 31, 2020
Derivatives not designated as hedges:
Foreign currency derivatives	Prepaid and other current assets	$	6	Other accrued liabilities	$	111
Interest rate swap contracts	Prepaid and other current assets	—		Other accrued liabilities	952
Total fair value		$	6		$	1,063

Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location

The location and amount of realized (gains) losses on derivatives are recognized in the Statements of Operations as follows for the periods ended September 30, 2021 and 2020:

		Amount of (Gain)/Loss Recognized
	Location of Realized (Gain)/Loss Recognized in the Consolidated Statement of Operations	For the Three Months Ended September 30,
		2021		2020
Derivatives designated as cash flow hedges:		(Dollars in thousands)
Commodity derivative contracts	Cost of sales	$	1,191	$	(1,295)
Interest rate swap contracts	Interest expense	285		1,537
Derivatives not designated as hedges:
Foreign currency derivatives	Cost of sales, Other expense (income)	$	448	$	(243)
Commodity derivative contracts	Cost of sales	(440)		(207)
		Amount of (Gain)/Loss Recognized
	Location of (Gain)/Loss Recognized in the Consolidated Statement of Operations	For the Nine Months Ended September 30,
		2021		2020
Derivatives designated as cash flow hedges:		(Dollars in thousands)
Commodity contract hedges	Cost of sales	$	6,238	$	(5,234)
Interest rate swap contracts	Interest expense	1,571		2,852
Derivatives not designated as hedges:
Foreign currency derivatives	Cost of sales, Other expense (income)	$	2,342	$	(959)
Commodity derivative contracts	Cost of sales	(682)		(321)
Interest rate swap contracts	Interest expense	866		—