Additional Balance Sheet Detail and Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands		Jun. 30, 2022	Dec. 31, 2021
Other Liabilities Disclosure [Abstract]
Other Accrued Liabilities		$ 8,158	$ 5,592
Unrealized Gain (Loss) on Derivatives		77	1,374
Accrued Income Taxes, Current		10,214	13,856
Accrual for Taxes Other than Income Taxes, Current		2,812	3,284
Interest Payable, Current		8,072	8,038
Accrued Salaries, Current		21,844	28,408
Deferred Revenue	[1]	26,081	16,093
Accrued liabilities and other		$ 88,334	$ 87,946

[1] See Note 17 -- Commitments and Contingencies for additional details on deferred revenue liabilities