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Commitments and Contingencies - Litigation and Environmental Contingencies (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended		12 Months Ended	0 Months Ended
	Jun. 25, 2012 officer	Jun. 20, 2012 officer	Dec. 31, 2014	Jun. 27, 2013	Dec. 31, 2012
Loss Contingencies [Line Items]
Loss contingency, number of defendants	2	2
Loss contingency, estimated litigation period			5 years
New Jersey
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies			2.5
Connecticut
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies					$ 0.1
Class Action Lawsuits Relating To Merger
Loss Contingencies [Line Items]
Number of shares held by shareholders who sent notices to exercise rights as per merger agreement				3.1
Litigation required notice period				120 days