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, 2017		15,153,009
Balance at beginning of period at Dec. 31, 2017	$ 288.0	$ 15.2	$ 117.8	$ 216.1	$ (55.2)	$ (17.9)	$ 12.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income	15.7			9.8		5.5	0.4
Stock-based compensation expense	2.2		2.2
Stock-based compensation activity (in shares)		12,000
Stock-based compensation activity	0.0	$ 0.0	0.0
Dividends	(1.6)			(1.6)
Purchase of treasury stock (26,917 shares)	(1.0)				(1.0)
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net	(1.1)				(1.1)
Ending balance (in shares) at Mar. 31, 2018		15,165,009
Balance at end of period at Mar. 31, 2018	$ 304.8	$ 15.2	120.0	226.9	(57.3)	(12.4)	12.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends per common share (in dollars per share)	$ 0.125
Beginning balance (in shares) at Dec. 31, 2018		15,555,275
Balance at beginning of period 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	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	$ 0.0	0.0
Dividends	(1.9)			(1.6)			(0.3)
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net	(1.0)				(1.0)
Ending balance (in shares) at Mar. 31, 2019		15,593,275
Balance at end of period 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]
Dividends per common share (in dollars per share)	$ 0.125