Acquisitions and Dispositions	3 Months Ended
Mar. 31, 2019
Business Combinations [Abstract]
Acquisitions and Dispositions	(4) Acquisitions and Dispositions Three Months Ended March 31, 2019: Acquisitions: There were no acquisitions during the first three months of 2019. Dispositions: There were no dispositions during the first three months of 2019. Three Months Ended March 31, 2018: Acquisitions: There were no acquisitions during the first three months of 2018. Dispositions: There were no dispositions during the first three months of 2018.

The entire disclosure for business combinations, including leverage buyout transactions (as applicable), and divestitures. This may include a description of a business combination or divestiture (or series of individually immaterial business combinations or divestitures) completed during the period, including background, timing, and assets and liabilities recognized and reclassified or sold. This element does not include fixed asset sales and plant closings.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-URI http://asc.fasb.org/subtopic&trid=2122178

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-URI http://asc.fasb.org/topic&trid=2303972

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