Acquisition Narrative (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
Jun. 30, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination	$ 26.4
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period		$ 15.0
Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination	$ 0.2

Fair value at acquisition-date of the assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interests issued by the acquirer, including but not limited to, instruments or interests issued or issuable in consideration for the business combination.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

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