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Investments, Part II (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Schedule of investments aggregated by industry [Abstract]    
Carrying Value $ 236,344 $ 229,785
Amortized Cost 211,584 210,072
Unrealized Gain (Losses) 24,760 19,713
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]    
Less than 12 months 14,176 31,499
12 months or longer 4,356 5,654
Total 18,532 37,153
Available-for-sale securities, continuous unrealized loss position, Unrealized Losses [Abstract]    
Less than 12 months 280 1,288
12 months or longer 563 883
Total 843 2,171
U.S. Treasury securities and obligations of U.S. Government agencies and authorities [Member]
    
Schedule of investments aggregated by industry [Abstract]    
Carrying Value 27,203 35,922
Amortized Cost 22,906 31,736
Unrealized Gain (Losses) 4,297 4,186
Obligations of states and political subdivisions [Member]
    
Schedule of investments aggregated by industry [Abstract]    
Carrying Value 17,694 17,030
Amortized Cost 15,260 15,273
Unrealized Gain (Losses) 2,434 1,757
Utilities and telecom [Member]
    
Schedule of investments aggregated by industry [Abstract]    
Carrying Value 20,430 22,469
Amortized Cost 17,314 19,326
Unrealized Gain (Losses) 3,116 3,143
Financial services [Member]
    
Schedule of investments aggregated by industry [Abstract]    
Carrying Value 51,984 44,624
Amortized Cost 49,758 45,319
Unrealized Gain (Losses) 2,226 (695)
Other business - diversified [Member]
    
Schedule of investments aggregated by industry [Abstract]    
Carrying Value 62,507 56,668
Amortized Cost 57,203 51,709
Unrealized Gain (Losses) 5,304 4,959
Other consumer - diversified [Member]
    
Schedule of investments aggregated by industry [Abstract]    
Carrying Value 52,396 48,983
Amortized Cost 45,013 42,620
Unrealized Gain (Losses) 7,383 6,363
Other Investment [Member]
    
Schedule of investments aggregated by industry [Abstract]    
Carrying Value 4,130 4,089
Amortized Cost 4,130 4,089
Unrealized Gain (Losses) 0 0
Corporate securities [Member]
    
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]    
Less than 12 months 13,554 30,675
12 months or longer 1,476 1,602
Total 15,030 32,277
Available-for-sale securities, continuous unrealized loss position, Unrealized Losses [Abstract]    
Less than 12 months 205 1,112
12 months or longer 524 398
Total 729 1,510
Redeemable preferred stocks [Member]
    
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]    
Less than 12 months 0 0
12 months or longer 1,883 2,807
Total 1,883 2,807
Available-for-sale securities, continuous unrealized loss position, Unrealized Losses [Abstract]    
Less than 12 months 0 0
12 months or longer 36 462
Total 36 462
Common and non-redeemable preferred stocks [Member]
    
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]    
Less than 12 months 622 824
12 months or longer 997 1,245
Total 1,619 2,069
Available-for-sale securities, continuous unrealized loss position, Unrealized Losses [Abstract]    
Less than 12 months 75 176
12 months or longer 3 23
Total $ 78 $ 199