Statement of Consolidated Stockholders' Equity and Comprehensive Income (Unaudited) (USD $) In Millions, except Share data	Total	Common Stock	Additional Capital	Retained Earnings	Common Stock Owned by Union VEBA Subject to Transfer Restriction	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2010	$ 912.2	$ 0.2	$ 987.1	$ 80.1	$ (84.6)	$ (72.3)	$ 1.7
Beginning balance, shares at Dec. 31, 2010	19,214,451	19,214,451
Net income	15.8			15.8
Foreign currency translation adjustment, net of tax of $0	(0.3)						(0.3)
Comprehensive income	15.5
Sale of Union VEBA shares by the Union VEBA, net of tax of $24.7	40.8		9.1		31.7
Issuance of non-vested shares to employees		76,803
Issuance of common shares to directors, Shares		3,750
Issuance of common shares to directors	0.2		0.2
Issuance of common shares to employees upon vesting of restricted stock units and performance shares		13,899
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares, values	(1.1)		(1.1)
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares		(23,078)
Cash dividends on common stock ($0.48) per share)	(9.4)			(9.4)
Amortization of unearned equity compensation	2.6		2.6
Reclassification relating to dividends on unvested equity awards	0.1			0.1
Ending balance at Jun. 30, 2011	$ 960.9	$ 0.2	$ 997.9	$ 86.6	$ (52.9)	$ (72.3)	$ 1.4
Ending balance, shares at Jun. 30, 2011	19,285,825	19,285,825