CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Beginning Balance at Dec. 31, 2023	$ 80.7	$ 0.0	$ 49.7	$ 87.2	$ (56.2)	$ 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	145.5			145.5
Other comprehensive income (loss), net	(0.6)				(0.6)
Share-based awards	9.8		9.8
Common stock repurchased	(10.0)					(10.0)
Cash dividends declared	(4.2)			(4.2)
Ending Balance at Sep. 30, 2024	$ 221.2	0.0	59.5	228.5	(56.8)	(10.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared (in dollars per share)	$ 0.05
Beginning Balance at Jun. 30, 2024	$ 178.1	0.0	56.2	188.9	(67.0)	0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	43.8			43.8
Other comprehensive income (loss), net	10.2				10.2
Share-based awards	3.3		3.3
Common stock repurchased	(10.0)					(10.0)
Cash dividends declared	(4.2)			(4.2)
Ending Balance at Sep. 30, 2024	$ 221.2	0.0	59.5	228.5	(56.8)	(10.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared (in dollars per share)	$ 0.05
Beginning Balance at Dec. 31, 2024	$ 227.4	0.0	61.9	264.5	(79.0)	(20.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	159.4			159.4
Other comprehensive income (loss), net	14.7				14.7
Share-based awards	8.6		8.6
Common stock repurchased	(60.7)					(60.7)
Cash dividends declared	(12.7)			(12.7)
Ending Balance at Sep. 30, 2025	$ 336.7	0.0	70.5	411.2	(64.3)	(80.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared (in dollars per share)	$ 0.155
Beginning Balance at Jun. 30, 2025	$ 316.3	0.0	67.2	360.8	(61.3)	(50.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	54.8			54.8
Other comprehensive income (loss), net	(3.0)				(3.0)
Share-based awards	3.3		3.3
Common stock repurchased	(30.3)					(30.3)
Cash dividends declared	(4.4)			(4.4)
Ending Balance at Sep. 30, 2025	$ 336.7	$ 0.0	$ 70.5	$ 411.2	$ (64.3)	$ (80.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared (in dollars per share)	$ 0.055