Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Amortized cost	$ 3,150,910	$ 3,135,647
Equity Securities, cost	$ 353,208	$ 361,418
Preferred Stock, par value	$ 0.10	$ 0.10
Preferred Stock, authorized shares	1,000,000	1,000,000
Preferred Stock, issued shares	0	0
Common Stock, par value	$ 0.10	$ 0.10
Common Stock, authorized shares	50,000,000	50,000,000
Common Stock, issued shares	36,993,000	36,805,000
Treasury Stock, shares	7,023,000	7,023,000
Fixed Maturities
Amortized cost	$ 3,143,622	$ 3,125,413
Short-Term Investments
Amortized cost	$ 7,288	$ 10,234