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, 2020	$ 522.9	$ 564.7	$ (52.5)	$ 10.7
Beginning Balance (Shares) at Dec. 31, 2020					69,005,059	6,511,293
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based awards vested and distributed	(1.7)	(1.7)
Stock-based awards vested and distributed (shares)					332,718
Issue Director shares					5,584
Amortization of restricted stock units	2.7	2.7
Net income (loss)	6.3		6.3
Other comprehensive income (loss)	(6.4)			(6.4)
Ending Balance at Mar. 31, 2021	523.8	565.7	(46.2)	4.3
Ending Balance (Shares) at Mar. 31, 2021					69,343,361	6,511,293
Beginning Balance at Dec. 31, 2020	522.9	564.7	(52.5)	10.7
Beginning Balance (Shares) at Dec. 31, 2020					69,005,059	6,511,293
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1.1				$ 1.0	$ 0.1
Other comprehensive income (loss)	(3.8)
Ending Balance at Jun. 30, 2021	629.3	673.8	(51.4)	6.9
Ending Balance (Shares) at Jun. 30, 2021					78,469,923	2,921,099
Beginning Balance at Mar. 31, 2021	523.8	565.7	(46.2)	4.3
Beginning Balance (Shares) at Mar. 31, 2021					69,343,361	6,511,293
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shareholder conversion of class C to class A (Shares)					3,590,194	(3,590,194)
May 2021 equity offering	103.4	103.4
May 2021 equity offering (Shares)					5,250,000
Stock-based awards vested and distributed (shares)					202,414
Issue Director shares					83,954
Amortization of restricted stock units	4.7	4.7
Net income (loss)	(5.2)		(5.2)		$ (5.0)	$ (0.2)
Other comprehensive income (loss)	2.6			2.6
Ending Balance at Jun. 30, 2021	629.3	673.8	(51.4)	6.9
Ending Balance (Shares) at Jun. 30, 2021					78,469,923	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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
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 income (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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(25.4)				$ (24.5)	$ (0.9)
Other comprehensive income (loss)	(3.1)
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
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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issue Director shares					32,954
Amortization of restricted stock units	5.3	5.3
Net income (loss)	(11.3)		(11.3)		$ (10.9)	$ (0.4)
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