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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Fixed income securities, held-to-maturity, fair value $ 20,727 $ 21,975
Fixed income securities, available-for-sale, amortized cost 6,065,554 5,879,986
Fixed income securities, available-for-sale, allowance for credit losses 10,395 0
Commercial mortgage loan, fair value 17,949 0
Equity securities, cost 144,617 72,061
Property and equipment - at cost, net of accumulated depreciation and amortization $ 237,021 $ 227,566
Preferred stock, par value per share $ 0 $ 0
Preferred stock, shares authorized 5,000,000 5,000,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value per share $ 2 $ 2
Common stock, shares authorized 360,000,000 360,000,000
Common stock, shares issued 103,937,634 103,484,159
Treasury stock - at cost, shares 44,125,892 44,023,006