Basis of Presentation (Policies)	9 Months Ended
Sep. 30, 2020
Basis of Presentation.
Principles of consolidation, policy	Principles of consolidation: The condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All inter-company balances and transactions have been eliminated in consolidation.
Variable interest entities, policy	Variable Interest Entities: The Company invests in certain tax credit funds that promote renewable energy. These investments generate a return primarily through the realization of federal tax credits and other tax benefits. The Company accounts for the tax attributes of its renewable energy investments using the deferral method. Under this method, realized investment tax credits and other tax benefits are recognized as a reduction of the renewable energy investments. The Company determined its investment in these tax credit funds was an investment in a variable interest entity (“VIE”). The Company analyzes any investments in VIEs at inception and again if certain triggering events are identified to determine if it is the primary beneficiary. The Company considers a variety of factors in identifying the entity that holds the power to direct matters that most significantly impact the VIE’s economic performance including, but not limited to, the ability to direct financing, leasing, construction and other operating decisions and activities. As of September 30, 2020, the Company invested in two unconsolidated tax credit fund entities that were considered to be VIEs and concluded it was not the primary beneficiary of either entity, as it did not have the power to control the activities that most significantly impact the entities, and has accounted for these investments using the equity method. The Company’s maximum exposure to losses associated with these VIEs is limited to its net investment, which was $13.2 million as of September 30, 2020, and was included in “Other assets, net” on the accompanying Condensed Consolidated Balance Sheets.

Disclosure of accounting policy for consolidation to describe the significant judgments and assumptions made in determining whether a variable interest held by the entity requires the variable interest entity to be consolidated and (or) disclose information about its involvement with the variable interest entity; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; and the significant factors considered and judgments made in determining that the power to direct the activities that significantly impact the economic performance of the variable interest entity are shared (as defined).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
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-Section 50
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
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