Unaudited Condensed Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Millions	Total	Additional Paid-In Capital	Accumulated Earnings (Deficit)	Accumulated Other Comprehensive Income (Loss)	Class A	Class C
Beginning Balance at Dec. 31, 2021	$ 636.2	$ 688.9	$ (55.3)	$ 2.6
Beginning Balance (Shares) at Dec. 31, 2021					78,482,024	2,921,099
Stock-based awards vested and distributed	(2.9)	(2.9)
Stock-based awards vested and distributed (shares)					521,719
Issue Director shares					2,495
Amortization of restricted stock units	8.8	8.8
Net loss	(14.1)		(14.1)
Other comprehensive income (loss)	3.4			3.4
Ending Balance at Mar. 31, 2022	631.4	694.8	(69.4)	6.0
Ending Balance (Shares) at Mar. 31, 2022					79,006,238	2,921,099
Beginning Balance at Dec. 31, 2021	636.2	688.9	(55.3)	2.6
Beginning Balance (Shares) at Dec. 31, 2021					78,482,024	2,921,099
Net loss	(34.1)
Other comprehensive income (loss)	(8.4)
Ending Balance at Sep. 30, 2022	611.6	706.8	(89.4)	(5.8)
Ending Balance (Shares) at Sep. 30, 2022					79,064,041	2,921,099
Beginning Balance at Mar. 31, 2022	631.4	694.8	(69.4)	6.0
Beginning Balance (Shares) at Mar. 31, 2022					79,006,238	2,921,099
Issue Director shares					32,954
Amortization of restricted stock units	5.3	5.3
Net loss	(11.3)		(11.3)
Other comprehensive income (loss)	(6.5)			(6.5)
Ending Balance at Jun. 30, 2022	618.9	700.1	(80.7)	(0.5)
Ending Balance (Shares) at Jun. 30, 2022					79,039,192	2,921,099
Stock-based awards vested and distributed (shares)					11,454
Issue Director shares					13,395
Amortization of restricted stock units	6.7	6.7
Net loss	(8.7)		(8.7)
Other comprehensive income (loss)	(5.3)			(5.3)
Ending Balance at Sep. 30, 2022	611.6	706.8	(89.4)	(5.8)
Ending Balance (Shares) at Sep. 30, 2022					79,064,041	2,921,099
Beginning Balance at Dec. 31, 2022	612.8	704.3	(96.7)	5.2
Beginning Balance (Shares) at Dec. 31, 2022					79,086,372	2,921,099
Stock-based awards vested and distributed	(0.4)	(0.4)
Stock-based awards vested and distributed (shares)					368,153
Issue Director shares					14,084
Amortization of restricted stock units	2.8	2.8
Net loss	(12.4)		(12.4)
Other comprehensive income (loss)	0.8			0.8
Ending Balance at Mar. 31, 2023	603.6	706.7	(109.1)	6.0
Ending Balance (Shares) at Mar. 31, 2023					79,468,609	2,921,099
Beginning Balance at Dec. 31, 2022	612.8	704.3	(96.7)	5.2
Beginning Balance (Shares) at Dec. 31, 2022					79,086,372	2,921,099
Net loss	(17.8)
Other comprehensive income (loss)	(5.2)
Ending Balance at Sep. 30, 2023	577.6	692.1	(114.5)	0.0
Ending Balance (Shares) at Sep. 30, 2023					79,652,315	2,921,099
Beginning Balance at Mar. 31, 2023	603.6	706.7	(109.1)	6.0
Beginning Balance (Shares) at Mar. 31, 2023					79,468,609	2,921,099
Stock-based awards vested and distributed (shares)					27,931
Issue Director shares					51,240
Amortization of restricted stock units	(9.5)	(9.5)
Net loss	(2.1)		(2.1)
Other comprehensive income (loss)	(1.8)			(1.8)
Ending Balance at Jun. 30, 2023	590.2	697.2	(111.2)	4.2
Ending Balance (Shares) at Jun. 30, 2023					79,547,780	2,921,099
Stock-based awards vested and distributed (shares)					65,830
Issue Director shares					38,705
Amortization of restricted stock units	(5.1)	(5.1)
Net loss	(3.3)		(3.3)
Other comprehensive income (loss)	(4.2)			(4.2)
Ending Balance at Sep. 30, 2023	$ 577.6	$ 692.1	$ (114.5)	$ 0.0
Ending Balance (Shares) at Sep. 30, 2023					79,652,315	2,921,099