Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Name:	us-gaap_BusinessCombinationConsiderationTransferred1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Noncontrolling Interests (Narrative) (Details) - USD ($) $ in Millions	Jan. 21, 2019	Jul. 19, 2017	Dec. 31, 2018	Apr. 02, 2015
Robtec
Business Acquisition [Line Items]
Acquired ownership percentage			70.00%
Easyway
Business Acquisition [Line Items]
Acquired ownership percentage		5.00%	70.00%	65.00%
Value of voting rights acquired		$ 2.3
Subsequent Event \| Easyway
Business Acquisition [Line Items]
Acquired ownership percentage	30.00%
Value of voting rights acquired	$ 13.5