Acquisitions and Other Investments Acquisitions and Other Investments - Fabcor (Narrative) (Details) (Fabcor [Member], USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended
	Apr. 30, 2011	Jun. 30, 2012	Apr. 02, 2011
Business Acquisition [Line Items]
Effective date of acquisition	Apr. 01, 2011
Business combination, percentage of voting interests acquired			100.00%
Acquisition payments in cash			$ 24.2
Purchase price consideration, adjustment		1.4
Debt assumed and repaid	7.0
Earn-out Arrangements [Member]
Business Acquisition [Line Items]
Earn-out period			5 years
Estimated fair value of contingent consideration			16.9
Business combination, contingent consideration arrangements, basis for amount	The earn-out is equal to 30% of the excess, if any, of Fabcor's annual EBITDA over 3.6 million Canadian dollars (approximately U.S. $3.6 million as of December 31, 2012), payable annually to the seller in cash in Canadian dollars
Fair value measurements, significant assumptions	The fair value of the earn-out obligation was estimated using an income approach and incorporates significant inputs not observable in the market. Key assumptions in the estimated valuation include the discount rate and probability-adjusted EBITDA projections.
Business combination, contingent consideration arrangements, range of outcomes, value, low			0
Business combination, contingent consideration arrangements, range of outcomes, value, high			$ 25
Order or Production Backlog [Member]
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	9 months
Customer Relationships [Member]
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	12 years
Noncompete Agreements [Member]
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	7 years