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Segment Reporting (Total Assets for Reportable Segments) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Assets	$ 13,849,447	$ 13,737,695
Eastern [Member]
Segment Reporting Information [Line Items]
Assets	3,055,672	3,099,283
Southern [Member]
Segment Reporting Information [Line Items]
Assets	3,441,079	3,952,449
Western [Member]
Segment Reporting Information [Line Items]
Assets	1,860,596	1,718,015
Central [Member]
Segment Reporting Information [Line Items]
Assets	1,956,234	1,885,468
Canada [Member]
Segment Reporting Information [Line Items]
Assets	2,444,922	2,490,291
Corporate [Member]
Segment Reporting Information [Line Items]
Assets	$ 1,090,944	$ 592,189

X

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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