CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock, at Cost [Member]	Non-controlling Interest [Member]	Total
Balance at Mar. 31, 2022	$ 34.2	$ 261.6	$ 344.4	$ (149.5)	$ (40.0)	$ 7.4	$ 458.1
Balance (in shares) at Mar. 31, 2022	54.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss)	$ 0.0	0.0	14.3	0.0	0.0	0.0	14.3
Other comprehensive income (loss)	0.0	0.0	0.0	(23.8)	0.0	(0.4)	(24.2)
Stock options and awards	$ 0.1	0.0	0.0	0.0	0.0	0.0	0.1
Stock options and awards (in shares)	0.1
Purchase of treasury stock	$ 0.0	0.0	0.0	0.0	(1.7)	0.0	(1.7)
Stock-based compensation expense	0.0	1.1	0.0	0.0	0.0	0.0	1.1
Dividend paid to noncontrolling interest	0.0	0.0	0.0	0.0	0.0	(0.6)	(0.6)
Balance at Jun. 30, 2022	$ 34.3	262.7	358.7	(173.3)	(41.7)	6.4	447.1
Balance (in shares) at Jun. 30, 2022	54.9
Balance at Mar. 31, 2022	$ 34.2	261.6	344.4	(149.5)	(40.0)	7.4	458.1
Balance (in shares) at Mar. 31, 2022	54.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss)							63.3
Other comprehensive income (loss)							(20.8)
Balance at Dec. 31, 2022	$ 34.6	268.8	407.6	(170.0)	(46.1)	6.6	501.5
Balance (in shares) at Dec. 31, 2022	55.3
Balance at Jun. 30, 2022	$ 34.3	262.7	358.7	(173.3)	(41.7)	6.4	447.1
Balance (in shares) at Jun. 30, 2022	54.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss)	$ 0.0	0.0	24.4	0.0	0.0	(0.1)	24.3
Other comprehensive income (loss)	0.0	0.0	0.0	(22.0)	0.0	(0.5)	(22.5)
Stock options and awards	$ 0.1	0.9	0.0	0.0	0.0	0.0	1.0
Stock options and awards (in shares)	0.2
Purchase of treasury stock	$ 0.0	0.0	0.0	0.0	(1.6)	0.0	(1.6)
Stock-based compensation expense	0.0	2.4	0.0	0.0	0.0	0.0	2.4
Balance at Sep. 30, 2022	$ 34.4	266.0	383.1	(195.3)	(43.3)	5.8	450.7
Balance (in shares) at Sep. 30, 2022	55.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss)	$ 0.0	0.0	24.5	0.0	0.0	0.2	24.7
Other comprehensive income (loss)	0.0	0.0	0.0	25.3	0.0	0.6	25.9
Stock options and awards	$ 0.2	1.3	0.0	0.0	0.0	0.0	1.5
Stock options and awards (in shares)	0.2
Purchase of treasury stock	$ 0.0	0.0	0.0	0.0	(2.8)	0.0	(2.8)
Stock-based compensation expense	0.0	1.5	0.0	0.0	0.0	0.0	1.5
Balance at Dec. 31, 2022	$ 34.6	268.8	407.6	(170.0)	(46.1)	6.6	501.5
Balance (in shares) at Dec. 31, 2022	55.3
Balance at Mar. 31, 2023	$ 34.6	270.8	497.5	(161.1)	(49.0)	6.8	$ 599.6
Balance (in shares) at Mar. 31, 2023	55.4						55.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss)	$ 0.0	0.0	44.8	0.0	0.0	0.5	$ 45.3
Other comprehensive income (loss)	0.0	0.0	0.0	(0.5)	0.0	(0.2)	(0.7)
Stock options and awards	$ 0.1	0.4	0.0	0.0	0.0	0.0	0.5
Stock options and awards (in shares)	0.2
Purchase of treasury stock	$ 0.0	0.0	0.0	0.0	(1.2)	0.0	(1.2)
Stock-based compensation expense	0.0	1.5	0.0	0.0	0.0	0.0	1.5
Dividend paid to noncontrolling interest	0.0	0.0	0.0	0.0	0.0	(0.5)	(0.5)
Balance at Jun. 30, 2023	$ 34.7	272.7	542.3	(161.6)	(50.2)	6.6	644.5
Balance (in shares) at Jun. 30, 2023	55.6
Balance at Mar. 31, 2023	$ 34.6	270.8	497.5	(161.1)	(49.0)	6.8	$ 599.6
Balance (in shares) at Mar. 31, 2023	55.4						55.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss)							$ 137.3
Other comprehensive income (loss)							7.2
Balance at Dec. 31, 2023	$ 35.0	279.6	633.2	(153.8)	(66.6)	7.8	$ 735.2
Balance (in shares) at Dec. 31, 2023	55.9						55.9
Balance at Jun. 30, 2023	$ 34.7	272.7	542.3	(161.6)	(50.2)	6.6	$ 644.5
Balance (in shares) at Jun. 30, 2023	55.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss)	$ 0.0	0.0	46.5	0.0	0.0	0.4	46.9
Other comprehensive income (loss)	0.0	0.0	0.0	(12.1)	0.0	0.0	(12.1)
Stock options and awards	$ 0.1	0.6	0.0	0.0	0.0	0.0	0.7
Stock options and awards (in shares)	0.1
Purchase of treasury stock	$ 0.0	0.0	0.0	0.0	(9.1)	0.0	(9.1)
Stock-based compensation expense	0.0	3.1	0.0	0.0	0.0	0.0	3.1
Balance at Sep. 30, 2023	$ 34.8	276.4	588.8	(173.7)	(59.3)	7.0	674.0
Balance (in shares) at Sep. 30, 2023	55.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss)	$ 0.0	0.0	44.4	0.0	0.0	0.7	45.1
Other comprehensive income (loss)	0.0	0.0	0.0	19.9	0.0	0.1	20.0
Stock options and awards	$ 0.2	0.1	0.0	0.0	0.0	0.0	0.3
Stock options and awards (in shares)	0.2
Purchase of treasury stock	$ 0.0	0.0	0.0	0.0	(7.3)	0.0	(7.3)
Stock-based compensation expense	0.0	3.1	0.0	0.0	0.0	0.0	3.1
Balance at Dec. 31, 2023	$ 35.0	$ 279.6	$ 633.2	$ (153.8)	$ (66.6)	$ 7.8	$ 735.2
Balance (in shares) at Dec. 31, 2023	55.9						55.9