Quarterly report pursuant to Section 13 or 15(d)

Investments in Affiliates Accounted for Using the Equity Method - (Investment in Lending Tree) (Details)

v3.19.3
Investments in Affiliates Accounted for Using the Equity Method - (Investment in Lending Tree) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]          
Carrying amount $ 168,839   $ 168,839   $ 177,030
Share of earnings (losses) $ 1,921 $ 10,856 $ (2,443) $ 18,714  
LendingTree          
Schedule of Equity Method Investments [Line Items]          
Percentage ownership 26.60%   26.60%    
Market value $ 1,069,118   $ 1,069,118    
Carrying amount 166,819   166,819   174,002
Share of earnings (losses) 2,000 $ 10,200 (1,400) $ 15,500  
Other          
Schedule of Equity Method Investments [Line Items]          
Carrying amount $ 2,020   $ 2,020   $ 3,028