Additional Balance Sheet Detail and Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands		Jun. 30, 2023	Dec. 31, 2022
Supplemental Cash Flow Information [Abstract]
Other Accrued Liabilities		$ 8,630	$ 6,241
Unrealized Gain (Loss) on Derivatives		67	10
Accrued Income Taxes, Current		6,040	7,874
Accrual for Taxes Other than Income Taxes, Current		2,791	3,318
Interest Payable, Current		8,044	8,256
Operating Lease, Liability, Current		11,270	11,560
Accrued Salaries, Current		22,486	29,868
Flow-through share premium received (including over-allotment)		5,510	0
Deferred Revenue	[1]	45,548	25,736
Accrued liabilities and other		$ 110,386	$ 92,863

[1] See Note 16 -- Commitments and Contingencies for additional details on deferred revenue liabilities