Additional Balance Sheet Detail and Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Supplemental Cash Flow Information [Abstract]
Accrued Salaries, Current		$ 22,983	$ 31,722
Flow-through share premium received (including over-allotment)		3,923	5,563
Deferred Revenue	[1]	55,595	55,547
Accrued Income Taxes, Current		7,704	11,766
Royalty settlement	[1]	6,750	0
Other Accrued Liabilities		12,811	11,081
Unrealized Gain (Loss) on Derivatives		7,994	1,981
Accrual for Taxes Other than Income Taxes, Current		2,104	5,321
Interest Payable, Current		3,699	7,957
Operating Lease, Liability, Current		8,282	9,975
Accrued liabilities and other		$ 131,845	$ 140,913

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