Commitments and Contingencies - Asbestos Claimant and Settlement (Details) (Asbestos [Member], USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2015 claimants	Dec. 31, 2014 claimants
Asbestos [Member]
Loss Contingencies [Line Items]
Number of pending claims at the beginning of period	7,992	7,975
Loss Contingency, New Claims Filed, Number	83	210
Number of pending claims dismissed during period	338	155
Number of pending claims settled during period	4	38
Average settlement amount per claim during period	$ 6,875	$ 18,734
Total defense costs during period	$ 718,800	$ 2,800,000