Segment Information - Reconciliation of Segment Information, Total Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 8,129,174	$ 9,060,806	$ 9,286,258
Items Excluded from Segment Assets:
Recoverable Income Taxes	644	$ 62,425
Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	7,195,668		8,143,186
Segment Reconciling Items
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	782,730		1,126,404
Items Excluded from Segment Assets:
Cash and Cash Equivalents	150,132		5,484
Recoverable Income Taxes	$ 644		$ 11,184