Condensed Consolidated Statement of Shareholders' Equity (Unaudited) - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive (Loss) Income	Noncontrolling Interest
Beginning balance (in shares) at Dec. 31, 2018		15,555,275
Beginning balance at Dec. 31, 2018	$ 312.6	$ 15.6	$ 125.7	$ 265.9	$ (67.3)	$ (40.9)	$ 13.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)	17.7			11.2		6.0	0.5
Stock-based compensation expense	1.9		1.9
Stock-based compensation activity (in shares)		38,000
Stock-based compensation activity	0.0
Dividends	(1.9)			(1.6)			(0.3)
Payments of withholding taxes on share awards	(1.0)				(1.0)
Ending balance (in shares) at Mar. 31, 2019		15,593,275
Ending balance at Mar. 31, 2019	329.3	$ 15.6	127.6	275.5	(68.3)	(34.9)	13.8
Beginning balance (in shares) at Dec. 31, 2018		15,555,275
Beginning balance at Dec. 31, 2018	312.6	$ 15.6	125.7	265.9	(67.3)	(40.9)	13.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)	23.5
Ending balance (in shares) at Jun. 30, 2019		15,517,725
Ending balance at Jun. 30, 2019	$ 330.2	$ 15.5	127.5	281.5	(71.0)	(37.0)	13.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends per common share (in dollars per share)	$ 0.250
Beginning balance (in shares) at Mar. 31, 2019		15,593,275
Beginning balance at Mar. 31, 2019	$ 329.3	$ 15.6	127.6	275.5	(68.3)	(34.9)	13.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)	5.8			7.6		(2.1)	0.3
Stock-based compensation expense	(0.2)		(0.2)
Stock-based compensation activity (in shares)		75,550
Stock-based compensation activity	0.0	$ (0.1)	0.1
Dividends	(2.0)			(1.6)			(0.4)
Purchases of treasury stock	(0.9)				(0.9)
Payments of withholding taxes on share awards	(1.8)				(1.8)
Ending balance (in shares) at Jun. 30, 2019		15,517,725
Ending balance at Jun. 30, 2019	$ 330.2	$ 15.5	127.5	281.5	(71.0)	(37.0)	13.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends per common share (in dollars per share)	$ 0.125
Beginning balance (in shares) at Dec. 31, 2019		15,706,398
Beginning balance at Dec. 31, 2019	$ 349.6	$ 15.7	129.8	298.2	(71.1)	(37.0)	14.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)	(14.8)			1.2		(16.1)	0.1
Stock-based compensation expense	1.4		1.4
Stock-based compensation activity (in shares)		1,000
Stock-based compensation activity	0.0
Dividends	(1.6)			(1.6)
Purchases of treasury stock	(2.9)				(2.9)
Payments of withholding taxes on share awards	(0.1)				(0.1)
Ending balance (in shares) at Mar. 31, 2020		15,707,398
Ending balance at Mar. 31, 2020	331.6	$ 15.7	131.2	297.8	(74.1)	(53.1)	14.1
Beginning balance (in shares) at Dec. 31, 2019		15,706,398
Beginning balance at Dec. 31, 2019	349.6	$ 15.7	129.8	298.2	(71.1)	(37.0)	14.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)	(28.5)
Ending balance (in shares) at Jun. 30, 2020		15,991,391
Ending balance at Jun. 30, 2020	$ 316.2	$ 16.0	132.2	281.2	(77.1)	(49.8)	13.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends per common share (in dollars per share)	$ 0.125
Beginning balance (in shares) at Mar. 31, 2020		15,707,398
Beginning balance at Mar. 31, 2020	$ 331.6	$ 15.7	131.2	297.8	(74.1)	(53.1)	14.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)	(13.7)			(16.6)		3.3	(0.4)
Stock-based compensation expense	1.3		1.3
Stock-based compensation activity (in shares)		283,993
Stock-based compensation activity	0.0	$ 0.3	(0.3)
Purchases of treasury stock	(2.4)				(2.4)
Payments of withholding taxes on share awards	(0.6)				(0.6)
Ending balance (in shares) at Jun. 30, 2020		15,991,391
Ending balance at Jun. 30, 2020	$ 316.2	$ 16.0	$ 132.2	$ 281.2	$ (77.1)	$ (49.8)	$ 13.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends per common share (in dollars per share)	$ 0