Commitments and Contingencies - Asbestos Claimant and Settlement (Details) - Asbestos [Member]	3 Months Ended	12 Months Ended
	Mar. 31, 2017 USD ($) claimants	Dec. 31, 2016 USD ($) claimants	Dec. 31, 2015 claimants
Loss Contingencies [Line Items]
Loss Contingency, Pending Claims, Number		5,339	6,242
Loss Contingency, New Claims Filed, Number	76	140
Loss Contingency, Claims Dismissed, Number	96	1,009
Loss Contingency, Claims Settled, Number	9	34
Average settlement amount per claim during period | $	$ 5,444	$ 15,624
Total defense costs during period | $	$ 617,600	$ 2,920,000