Consolidated Statement of Shareholders' Equity - 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, 2012		14,109,255
Beginning balance at Dec. 31, 2012	$ 101.8	$ 14.1	$ 76.9	$ 42.2	$ (24.6)	$ (6.8)	$ 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)	54.1			43.4		10.2	0.5
Share-based compensation	4.1		4.1	0.0
Restricted stock awards and options exercised (in shares)		204,650
Restricted stock awards and options exercised	0.0	$ 0.2	(0.2)
Restricted stock cancelled (in shares)		(4,000)
Restricted stock cancelled	0.0	$ 0.0	0.0
Performance shares issued (in shares)		14,000
Performance shares issued	0.4	$ 0.0	0.4
Capital contribution from non-controlling interest	5.0		0.5				4.5
Purchase of treasury stock	(2.2)				(2.2)
Exercise of stock options (in shares)		40,334
Exercise of stock options	0.4	$ 0.1	0.3
Income tax effect of share-based compensation exercises and vesting	0.4		0.4
Ending balance (in shares) at Dec. 31, 2013		14,364,239
Ending balance at Dec. 31, 2013	164.0	$ 14.4	82.4	85.6	(26.8)	3.4	5.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)	29.5			45.6		(17.4)	1.3
Share-based compensation	5.8		5.8	0.0
Restricted stock awards and options exercised (in shares)		140,250
Restricted stock awards and options exercised	0.0	$ 0.1	(0.1)
Restricted stock cancelled (in shares)		(4,668)
Restricted stock cancelled	(0.1)	$ 0.0	(0.1)
Performance shares issued (in shares)		14,000
Performance shares issued	0.7	$ 0.0	0.7
Dividends	(4.7)			(4.7)
Purchase of treasury stock	(4.4)				(4.4)
Income tax effect of share-based compensation exercises and vesting	1.1		1.1
Ending balance (in shares) at Dec. 31, 2014		14,513,821
Ending balance at Dec. 31, 2014	191.9	$ 14.5	89.8	126.5	(31.2)	(14.0)	6.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)	32.7			48.1		(16.0)	0.6
Share-based compensation	7.3		7.3	0.0
Restricted stock awards and options exercised (in shares)		72,500
Restricted stock awards and options exercised	0.0	$ 0.1	(0.1)
Restricted stock cancelled (in shares)		(29,836)
Restricted stock cancelled	0.0	$ 0.0	0.0
Performance shares issued (in shares)		14,000
Performance shares issued	0.0	$ 0.0	0.0
Dividends	(6.3)			(6.3)
Purchase of treasury stock	$ (15.5)				(15.5)
Exercise of stock options (in shares)	83,500	83,500
Exercise of stock options	$ 1.2	$ 0.1	1.1
Income tax effect of share-based compensation exercises and vesting	0.9		0.9
Ending balance (in shares) at Dec. 31, 2015		14,653,985
Ending balance at Dec. 31, 2015	$ 212.2	$ 14.7	$ 99.0	$ 168.3	$ (46.7)	$ (30.0)	$ 6.9