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Investments (Tables)
 9 Months Ended
Sep. 30, 2012
Investments, Debt and Equity Securities [Abstract]  
Available-for-sale Securities [Table Text Block]

The amortized cost and estimated fair value of investments in debt and equity securities by category are as follows (in thousands):

 

          Gross     Gross        
    Amortized     Unrealized     Unrealized     Fair  
As of September  30, 2012   Cost     Gains     Losses     Value  
                                 
U.S. Treasury securities and obligations of U.S. Government   $ 16,082     $ 19     $ -     $ 16,101  
Corporate bonds     88,459       2,829       (964 )     90,324  
Collateralized corporate bank loans     109,010       976       (653 )     109,333  
Municipal bonds     163,796       4,330       (2,841 )     165,285  
Mortgage-backed     3,148       106       (9 )     3,245  
                                 
Total debt securities     380,495       8,260       (4,467 )     384,288  
                                 
Financial services     11,004       3,648       (1 )     14,651  
All other     18,114       8,968       (39 )     27,043  
                                 
Total equity securities     29,118       12,616       (40 )     41,694  
                                 
Total debt and equity securities   $ 409,613     $ 20,876     $ (4,507 )   $ 425,982  
                                 
As of December 31, 2011                                
                                 
U.S. Treasury securities and obligations of U.S. Government   $ 11,152     $ 24     $ -     $ 11,176  
Corporate bonds     93,272       2,305       (1,655 )     93,922  
Collateralized corporate bank loans     94,638       175       (1,920 )     92,893  
Municipal bonds     177,432       3,458       (2,549 )     178,341  
Mortgage-backed     4,084       80       (27 )     4,137  
                                 
Total debt securities     380,578       6,042       (6,151 )     380,469  
                                 
Financial services     11,618       4,463       (260 )     15,821  
All other     18,847       9,554       (63 )     28,338  
                                 
Total equity securities     30,465       14,017       (323 )     44,159  
                                 
Total debt and equity securities   $ 411,043     $ 20,059     $ (6,474 )   $ 424,628
Realized Gain (Loss) on Investments [Table Text Block]

Major categories of net realized gains (losses) on investments are summarized as follows (in thousands):

 

    Three Months Ended     Nine Months Ended  
    September 30     September 30  
    2012     2011     2012     2011  
                         
U.S. Treasury securities and obligations of U.S. Government   $ -     $ 21     $ -     $ 35  
Corporate bonds     159       (21 )     9       250  
Collateralized corporate bank loans     93       (23 )     229       617  
Municipal bonds     (50 )     (318 )     (294 )     (319 )
Mortgage-backed     -       -       -       -  
Equity securities-financial services     8       735       78       1,524  
Equity securities-all other     772       -       2,078       1,070  
Gain on investments     982       394       2,100       3,177  
Other-than-temporary impairments     -       -       (246 )     -  
Net realized gains   $ 982     $ 394     $ 1,854     $ 3,177
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block]

The following schedules summarize the gross unrealized losses showing the length of time that investments have been continuously in an unrealized loss position as of September 30, 2012 and December 31, 2011 (in thousands):

 

    As of September 30, 2012  
    12 months or less     Longer than 12 months     Total  
          Unrealized           Unrealized           Unrealized  
    Fair Value     Losses     Fair Value     Losses     Fair Value     Losses  
                                     
U.S. Treasury securities and obligations of U.S. Government   $ -     $ -     $ -     $ -     $ -     $ -  
Corporate bonds     16,700       (62 )     6,767       (902 )     23,467       (964 )
Collateralized corporate bank loans     3,386       (34 )     16,109       (619 )     19,495       (653 )
Municipal bonds     26,349       (346 )     32,692       (2,495 )     59,041       (2,841 )
Mortgage-backed     408       (9 )     21       -       429       (9 )
Total debt securities     46,843       (451 )     55,589       (4,016 )     102,432       (4,467 )
                                                 
Financial services     88       (1 )     -       -       88       (1 )
All other     997       (39 )     -       -       997       (39 )
Total equity securities     1,085       (40 )     -       -       1,085       (40 )
                                                 
Total debt and equity securities   $ 47,928     $ (491 )   $ 55,589     $ (4,016 )   $ 103,517     $ (4,507 )

 

    As of  December 31, 2011  
    12 months or less     Longer than 12 months     Total  
          Unrealized           Unrealized           Unrealized  
    Fair Value     Losses     Fair Value     Losses     Fair Value     Losses  
                                     
U.S. Treasury securities and obligations of U.S. Government   $ -     $ -     $ -     $ -     $ -     $ -  
Corporate bonds     21,752       (869 )     2,366       (786 )     24,118       (1,655 )
Collateralized corporate bank loans     69,717       (1,917 )     19       (3 )     69,736       (1,920 )
Municipal bonds     26,780       (196 )     39,741       (2,353 )     66,521       (2,549 )
Mortgage-backed     740       (27 )     -       -       740       (27 )
Total debt securities     118,989       (3,009 )     42,126       (3,142 )     161,115       (6,151 )
                                                 
Financial services     1,789       (260 )     -       -       1,789       (260 )
All other     2,959       (63 )     -       -       2,959       (63 )
Total equity securities     4,748       (323 )     -       -       4,748       (323 )
                                                 
Total debt and equity securities   $ 123,737     $ (3,332 )   $ 42,126     $ (3,142 )   $ 165,863     $ (6,474 )
Schedule of Amortized Cost and Estimated Fair Value of Available for Sale Securities Contractual Maturities [Table Text Block]

The amortized cost and estimated fair value of debt securities at September 30, 2012 by contractual maturity are as follows. Expected maturities may differ from contractual maturities because certain borrowers may have the right to call or prepay obligations with or without penalties.

 

    Amortized     Fair  
    Cost     Value  
    (in thousands)  
             
Due in one year or less   $ 50,324     $ 50,937  
Due after one year through five years     163,456       166,452  
Due after five years through ten years     112,290       113,254  
Due after ten years     51,277       50,400  
Mortgage-backed     3,148       3,245  
    $ 380,495     $ 384,288