Current Expected Credit Losses (Narrative) (Details) $ in Thousands	Jan. 01, 2020 USD ($)	Sep. 30, 2020 USD ($) loan	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Impact of adoption of new accounting standards		$ (662,119)	$ (669,204)	$ (685,016)	$ (628,673)	$ (606,696)	$ (547,366)
New Valley LLC
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses		$ 12,108		3,100
Number of loans | loan		2
Total amortized cost basis		$ 15,928		15,276
Interest receivable		6,428		5,776
Impact of adoption of new accounting standards
Financing Receivable, Allowance for Credit Loss [Line Items]
Impact of adoption of new accounting standards	$ (2,263)			(2,263)			$ (1,550)
Allowance for credit losses	$ 3,100
Real estate broker agent receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses		$ 7,715		$ 6,132