Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
Investments in Affiliates Accounted for Using the Equity Method - (Investment in Lending Tree) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]          
Carrying amount $ 169,795   $ 169,795   $ 177,030
Share of earnings (losses) $ (1,068) $ 10,350 $ (4,364) $ 7,858  
LendingTree          
Schedule of Equity Method Investments [Line Items]          
Percentage ownership 26.70%   26.70%    
Market value $ 1,446,579   $ 1,446,579    
Carrying amount 167,703   167,703   174,002
Share of earnings (losses) (1,300) $ 7,700 (3,400) $ 5,300  
Other          
Schedule of Equity Method Investments [Line Items]          
Carrying amount $ 2,092   $ 2,092   $ 3,028