Consolidated Balance Sheets (Parenthetical) $ in Thousands	Dec. 31, 2017 USD ($) $ / shares shares
Equity Securities, cost | $	$ 224,159
Preferred Stock, par value | $ / shares	$ 0.10
Preferred Stock, authorized shares	1,000,000
Preferred Stock, issued shares	0
Common Stock, par value | $ / shares	$ 0.10
Common Stock, authorized shares	50,000,000
Common Stock, issued shares	36,530,000
Treasury Stock, shares	7,023,000
Fixed Maturities
Amortized cost | $	$ 3,027,408
Short-Term Investments
Amortized cost | $	$ 6,477