Consolidated Statements of Equity (USD $) In Millions, except Share data	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2009	$ 0.3	$ 84.8	$ 271.6	$ 32.0	$ (14.3)	$ 1.0	$ 375.4
Balance (in shares) at Dec. 31, 2009	32,015,771
Net income (loss)			29.2			(0.7)	28.5
Cash dividends			(22.3)				(22.3)
Issuance of common stock and treasury shares pursuant to employee stock compensation plans		2.7			5.4		8.1
Tax benefit from employee stock compensation plans		0.3					0.3
Vesting of common stock in connection with employee stock compensation plans		4.6					4.6
Deconsolidation of variable interest entity						(1)	(1)
Purchase of noncontrolling interest shares		2.7					2.7
Other comprehensive income (loss)				(3.3)		1.0	(2.3)
Balance at Dec. 31, 2010	0.3	95.1	278.5	28.7	(8.9)	0.3	394.0
Balance (in shares) at Dec. 31, 2010	32,015,771
Net income (loss)			58.5			0	58.5
Cash dividends			(22.7)				(22.7)
Issuance of common stock and treasury shares pursuant to employee stock compensation plans		2.5			5.5		8.0
Tax benefit from employee stock compensation plans		0.6					0.6
Vesting of common stock in connection with employee stock compensation plans		4.9					4.9
Purchase of noncontrolling interest shares		(5.4)				(0.3)	(5.7)
Sale of subsidiary shares to noncontrolling interest		(3.4)		(1.4)		4.8	0
Other comprehensive income (loss)				(42.0)		(0.7)	(42.7)
Balance at Dec. 31, 2011	0.3	94.3	314.3	(14.7)	(3.4)	4.1	394.9
Balance (in shares) at Dec. 31, 2011	32,015,771
Net income (loss)			65.1			(0.2)	64.9
Cash dividends			(24.2)				(24.2)
Issuance of common stock and treasury shares pursuant to employee stock compensation plans (in shares)	168,339						168,339
Issuance of common stock and treasury shares pursuant to employee stock compensation plans		6.3			3.4		9.7
Tax benefit from employee stock compensation plans		(0.1)					(0.1)
Vesting of common stock in connection with employee stock compensation plans		4.5					4.5
Contribution from noncontrolling partner		0.1					0.1
Other comprehensive income (loss)				15.5		(0.2)	15.3
Balance at Dec. 31, 2012	$ 0.3	$ 105.1	$ 355.2	$ 0.8	$ 0	$ 3.7	$ 465.1
Balance (in shares) at Dec. 31, 2012	32,184,110