Commitments And Contingencies (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Business Acquisition, Contingent Consideration [Line Items]
Operating lease commitment	$ 26.8
Operating lease termination year	2022
Issued letter of credit in addition to escrow		0.1
2006 Gulf Coast Acquisition [Member]
Business Acquisition, Contingent Consideration [Line Items]
Escrow deposit related to abandonment and remediation obligations	10.7
Period of time escrow in effect after abandonment and remediation obligations	3 years
Maximum date escrow will be returned	December 31, 2026
Addtional line of credit issued each year to seller	3
Issued letter of credit in addition to escrow	3.0	23.4
Prize [Member]
Business Acquisition, Contingent Consideration [Line Items]
Assumed estimated environmental liability	$ 2.1	$ 1.9