Acquisitions - A and W Technologies (Details) - USD ($) $ in Millions			1 Months Ended
		Nov. 01, 2015	Nov. 30, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Assets Acquired [Abstract]
Goodwill				$ 131.2	$ 130.6	$ 2.9
A and W Technologies [Member]
Business Acquisition [Line Items]
Percentage of Voting Interests Acquired		100.00%
Name of Acquired Entity			A and W Technologies, Inc.
Total Consideration		$ 9.3
Payments to Acquire Business		8.3
Payment Due in April 2017		1.0
Assets Acquired [Abstract]
Current Assets		1.0
Property, Plant and Equipment		0.1
Intangible Assets	[1]	3.9
Goodwill	[2]	4.4
Total Assets Acquired		9.4
Liabilities Assumed [Abstract]
Current Liabilities		0.1
Total Liabilities Assumed		0.1
Net Identifiable Assets Acquired		9.3
Tax Deductible Goodwill		$ 4.4

[1] Intangible Assets include customer relationships and non-compete agreements. (See Note 7. Goodwill and Intangible Assets.)

[2] For tax purposes, the purchase price allocation resulted in $4.4 million of deductible goodwill.