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Investments In Securities Investments In Securities (Schedule of Variable Interest Entities) (Details) - Other investments
Jun. 30, 2017
USD ($)
Variable Interest Entity [Line Items]  
Carrying Value $ 9,382,636
Estimated Fair Value 10,262,757
Maximum Potential Loss 17,925,000
Tax credit LPs  
Variable Interest Entity [Line Items]  
Carrying Value 888,085
Estimated Fair Value 888,085
Maximum Potential Loss 1,325,000
Real estate LLCs or LPs  
Variable Interest Entity [Line Items]  
Carrying Value 4,980,074
Estimated Fair Value 5,806,446
Maximum Potential Loss 7,200,000
Small business investment LPs  
Variable Interest Entity [Line Items]  
Carrying Value 3,514,477
Estimated Fair Value 3,568,226
Maximum Potential Loss $ 9,400,000