Condensed Consolidated Statement of Shareholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Millions	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained (Deficit) Earnings	Accumulated Other Comprehensive Income
Beginning balance (in shares) at Dec. 31, 2021		37,854
Beginning balance at Dec. 31, 2021	$ 153.6	$ 0.4	$ 195.8	$ (20.4)	$ (25.5)	$ 3.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	1.0		1.0
Issuance of restricted stock (in shares)		22
Issuance of restricted stock	0.0		(0.4)	0.4
Stock withheld for employee taxes (in shares)		(11)
Stock withheld for employee taxes	(0.4)			(0.4)
Proceeds from issuance of common stock (in shares)		29
Proceeds from issuance of common stock	0.7		0.1	0.6
Issuance of shares under employee stock purchase plan (in shares)		23
Issuance of shares under employee stock purchase plan	0.6		0.6
Dividends	(6.8)				(6.8)
Change in cumulative translation adjustment	0.1					0.1
Net income	22.0				22.0
Ending balance (in shares) at Mar. 31, 2022		37,917
Ending balance at Mar. 31, 2022	170.8	$ 0.4	197.1	(19.8)	(10.3)	3.4
Beginning balance (in shares) at Dec. 31, 2021		37,854
Beginning balance at Dec. 31, 2021	153.6	$ 0.4	195.8	(20.4)	(25.5)	3.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in cumulative translation adjustment	(0.3)
Net income	44.8
Ending balance (in shares) at Jun. 30, 2022		37,928
Ending balance at Jun. 30, 2022	187.7	$ 0.4	198.3	(19.6)	5.6	3.0
Beginning balance (in shares) at Mar. 31, 2022		37,917
Beginning balance at Mar. 31, 2022	170.8	$ 0.4	197.1	(19.8)	(10.3)	3.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	1.4		1.4
Issuance of restricted stock (in shares)		10
Issuance of restricted stock	0.0		(0.2)	0.2
Proceeds from issuance of common stock (in shares)		1
Dividends	(6.9)				(6.9)
Change in cumulative translation adjustment	(0.4)					(0.4)
Net income	22.8				22.8
Ending balance (in shares) at Jun. 30, 2022		37,928
Ending balance at Jun. 30, 2022	187.7	$ 0.4	198.3	(19.6)	5.6	3.0
Beginning balance (in shares) at Dec. 31, 2022		37,961
Beginning balance at Dec. 31, 2022	210.4	$ 0.4	201.2	(19.5)	25.9	2.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	0.6		0.6
Issuance of restricted stock (in shares)		36
Issuance of restricted stock	0.0		(0.6)	0.6
Stock withheld for employee taxes (in shares)		(14)
Stock withheld for employee taxes	(0.4)		(0.1)	(0.3)
Proceeds from issuance of common stock (in shares)		3
Proceeds from issuance of common stock	0.1		0.0	0.1
Issuance of shares under employee stock purchase plan (in shares)		31
Issuance of shares under employee stock purchase plan	0.7		0.7
Dividends	(7.7)				(7.7)
Change in cumulative translation adjustment	0.1					0.1
Net income	13.2				13.2
Ending balance (in shares) at Mar. 31, 2023		38,017
Ending balance at Mar. 31, 2023	217.0	$ 0.4	201.8	(19.1)	31.4	2.5
Beginning balance (in shares) at Dec. 31, 2022		37,961
Beginning balance at Dec. 31, 2022	210.4	$ 0.4	201.2	(19.5)	25.9	2.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in cumulative translation adjustment	0.3
Net income	34.7
Ending balance (in shares) at Jun. 30, 2023		38,031
Ending balance at Jun. 30, 2023	231.8	$ 0.4	202.3	(18.9)	45.3	2.7
Beginning balance (in shares) at Mar. 31, 2023		38,017
Beginning balance at Mar. 31, 2023	217.0	$ 0.4	201.8	(19.1)	31.4	2.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	0.6		0.6
Issuance of restricted stock (in shares)		8
Issuance of restricted stock	0.0		(0.1)	0.1
Stock withheld for employee taxes (in shares)		(2)
Stock withheld for employee taxes	(0.1)		(0.1)	0.0
Proceeds from issuance of common stock (in shares)		8
Proceeds from issuance of common stock	0.2		0.1	0.1
Dividends	(7.6)				(7.6)
Change in cumulative translation adjustment	0.2					0.2
Net income	21.5				21.5
Ending balance (in shares) at Jun. 30, 2023		38,031
Ending balance at Jun. 30, 2023	$ 231.8	$ 0.4	$ 202.3	$ (18.9)	$ 45.3	$ 2.7