Commitments and Contingencies (Details) - Pre-Acquisition Related Contingencies - Brinderson LP - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2017	Dec. 31, 2016
Loss Contingencies [Line Items]
Loss contingency accrual	$ 5.3	$ 6.0
Change in accrual	$ 0.7

Amount of increase (decrease) in loss contingency liability.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration