Commitments And Contingencies - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Loss Contingencies [Line Items]
Notes payable, fair value disclosure	$ 688,000
Interest rate swap principal		$ 200,000
Derivative, Variable Interest Rate		2.823%
Foreign Currency Transaction Gain (Loss), before Tax	400	$ (1,900)
Proceeds from Sale of Debt Securities, Available-for-sale	0
Debt Securities, Available-for-sale, Realized Gain		300
Debt Securities, Available-for-sale, Unrealized Gain	200
Angolan bonds	6,229		$ 6,229
Loss Contingency Accrual	(5,800)		(11,000)
Loss Contingency Accrual, Period Increase (Decrease)	18,000
Short-term Investments	6,200
Manufactured Products Member
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	17,000		33,000
Angola [Member]
Loss Contingencies [Line Items]
Proceeds from Sale of Debt Securities, Available-for-sale		2,361
Bonds
Loss Contingencies [Line Items]
Proceeds from Sale of Debt Securities, Available-for-sale		2,400
Angola, Kwanza [Member]
Loss Contingencies [Line Items]
Foreign Currency Transaction Gain (Loss), before Tax	900	1,400
Cash and cash equivalents	1,700		$ 1,000
Angola [Member]
Loss Contingencies [Line Items]
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five	$ 6,400
Senior Notes due 2024 [Member]
Loss Contingencies [Line Items]
Derivative Liability, Notional Amount		$ 100,000
Senior Notes due 2024 [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Loss Contingencies [Line Items]
Derivative, Variable Interest Rate		2.426%