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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Fixed income securities, held-to-maturity, fair value $ 37,942 $ 38,317
Fixed income securities, available-for-sale, amortized cost 5,463,273 5,270,798
Equity securities, cost 143,376 138,144
Premiums receivable, allowance for uncollectible accounts 9,600 9,400
Reinsurance recoverable, allowance for uncollectible accounts 4,100 4,500
Property and equipment - at cost, accumulated depreciation and amortization $ 216,071 $ 211,657
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 103,225,716 102,848,394
Treasury stock - at cost, shares 44,002,811 43,899,840