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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands, None in scaling factor is -9223372036854775296
Jun. 30, 2015
Dec. 31, 2014
Available-for-sale Debt securities, Amortized cost $ 165,995 $ 96,163
Available-for-sale Equity securities, Amortized cost $ 59,557 $ 45,387
Preferred stock, no par value    
Preferred stock, authorized 18,100,000 18,100,000
Preferred stock, issued 0 0
Preferred stock, outstanding 0 0
Common stock, no par value    
Common stock, shares authorized 40,000,000 40,000,000
Common stock, shares issued 10,263,149 10,189,128
Common stock, outstanding 10,263,149 10,189,128
7% Series A Cumulative Convertible Preferred Stock [Member]    
Preferred stock, no par value    
Preferred stock, authorized 1,500,000 1,500,000
Preferred stock, issued 0 0
Preferred stock, outstanding 0 0
Series B Preferred Stock [Member]    
Preferred stock, no par value    
Preferred stock, authorized 400,000 400,000
Preferred stock, issued 0 0
Preferred stock, outstanding 0 0