Significant Accounting Policies (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net foreign currency transaction gains (losses)	$ (14.0)	$ 1.1	$ (3.3)
Percentage of revenue from largest client	3.00%
Minimum [Member]
Identifiable intangible assets, useful life	5 years
Maximum [Member]
Identifiable intangible assets, useful life	12 years
Equipment | Minimum [Member]
Property and Equipment, useful life	3 years
Equipment | Maximum [Member]
Property and Equipment, useful life	5 years
Furniture | Minimum [Member]
Property and Equipment, useful life	7 years
Furniture | Maximum [Member]
Property and Equipment, useful life	10 years
Office Buildings | Maximum [Member]
Property and Equipment, useful life	40 years