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Reserves For Claims (Summary Of Transactions In Reserves For Claims) (Details) (USD $)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Reserves For Claims [Abstract]          
Balance, beginning of period     $ 37,996,000 $ 38,198,700 $ 38,198,700
Provision, charged to operations 2,432,057 349,672 4,424,523 2,301,259 3,342,427
Payments of claims, net of recoveries     (3,414,523) (2,951,959) (3,545,127)
Ending balance $ 39,006,000   $ 39,006,000   $ 37,996,000