Commitments and Contingencies (Details) (USD $)	3 Months Ended	12 Months Ended		3 Months Ended	15 Months Ended
	Mar. 31, 2015 claim LegalMatter	Dec. 31, 2014 claim LegalMatter	Dec. 31, 2012	Mar. 31, 2014	Mar. 31, 2015
Commitments and Contingencies Disclosure [Line Items]
Number of pending claims (legal matter)	424	438			424
Description of named defendants	Cases involving us typically name 50-300 defendants
Number of claims dismissed	62	104
Number of claims settled (claim)	0	13
Claims settlements amount	$ 0	$ 3,200,000
Cost sharing agreement, expiration date	Jan. 25, 2015
Asbestos-related liabilities, estimated liability		56,500,000
Asbestos-related liabilities, estimated insurance recovery		53,000,000
Minimum [Member]
Commitments and Contingencies Disclosure [Line Items]
Number of defendants (defendant)	1
Maximum [Member]
Commitments and Contingencies Disclosure [Line Items]
Number of defendants (defendant)	833
Asbestos forcast claim period (years)	10 years		10 years
Superfund Sites Proceedings [Member]
Commitments and Contingencies Disclosure [Line Items]
Number of pending claims (legal matter)	1				1
Estimated total cleanup costs, cost sharing percentage (percent)	2.00%
Loss contingency, minimum possible loss				18,800,000
Loss contingency, maximum possible loss				29,600,000
Estimated total cleanup costs, accrual	400,000				400,000
PCB Contamination Proceedings [Member]
Commitments and Contingencies Disclosure [Line Items]
Estimated total cleanup costs, accrual	700,000				700,000
Accrual for environmental loss contingencies	200,000				200,000
Remediation and monitoring costs incurred since inception related to the PCB soil and building contamination		500,000			2,400,000
Connecticut Voluntary Corrective Action Program [Member]
Commitments and Contingencies Disclosure [Line Items]
PCB contamination of the building, liability recording during the period	100,000
Claim of Improper Relationship Termination [Member]
Commitments and Contingencies Disclosure [Line Items]
Claims settlements amount	$ 500,000