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Notes Payable, Long-Term Debt and Other Obligations (Senior Notes) (Details) - Senior Notes - 10.5% Senior Notes due 2026 - Subsequent Event
Nov. 02, 2018
USD ($)
Debt Instrument [Line Items]  
Face amount of debt $ 325,000,000
Interest rate 10.50%
Net proceeds from issuance of senior notes $ 315,000,000
Redemption interest rate 1.00%
Maximum percent of principal amount redeemable 40.00%
Percent of net proceeds of certain equity offerings 110.50%
Minimum percentage of principal amount to remain outstanding 60.00%
Period of redemption after closing 90 days
Repurchase price 101.00%
Douglas Elliman Realty, LLC  
Debt Instrument [Line Items]  
Equity-method ownership percentage 70.59%