Debt (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011		Nov. 13, 2009
Debt Instrument [Line Items]
Total debt	$ 606.3		$ 608.0
Current maturities	1.8		3.4
Long-term debt before discount	604.5		604.6
Total long-term debt $	602.2		602.1
8.375% Senior Notes Due In 2017
Debt Instrument [Line Items]
Total debt	215.0	[1]	215.0	[1]
Less discount on 8.375% notes	(2.3)		(2.5)		(3.1)
8.125% Senior Notes Due In 2018
Debt Instrument [Line Items]
Total debt	375.0		375.0
Ge Obligation
Debt Instrument [Line Items]
Total debt	10.4		12.4
Current maturities	0.9		2.6
Other Capital Leases
Debt Instrument [Line Items]
Total debt	4.5		4.1
Current maturities	0.7		0.6
Other Debt
Debt Instrument [Line Items]
Total debt	1.4		1.5
Current maturities	$ 0.2		$ 0.2

[1] Our 8.375% senior notes were issued at a discount of 1.425% on November 13, 2009.