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Net Investment Income
 3 Months Ended
Mar. 31, 2021
Net Investment Income [Abstract]  
Net Investment Income Net Investment Income
    Net investment income consisted of the following: 
 For the Three Months
Ended March 31,
(In thousands)20212020
Investment income earned on:
Fixed maturity securities, including cash and cash equivalents and loans receivable$94,677 $128,018 
Investment funds38,935 40,577 
Arbitrage trading account19,074 1,138 
Equity securities6,180 1,563 
Real estate1,161 6,096 
Gross investment income160,027 177,392 
Investment expense(1,450)(2,629)
Net investment income$158,577 $174,763