Fair Value Measurements (Details) (USD $)	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
Mortgage Servicing Rights [Member]
Assets:
Assets, Total	$ 2,666,498	$ 2,746,606	$ 2,512,103
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets:
Assets, Total	45,684,533
Other Observable Inputs (Level 2) [Member]
Assets:
Assets, Total	233,008,665
Net Significant Unobservable Inputs (Level 3) [Member]
Assets:
Assets, Total	828,598,498
Recurring [Member]
Assets:
Assets, Total	230,936,239		213,806,001
Recurring [Member] \| U.S. treasury [Member]
Assets:
Assets, Total	2,040,781		2,054,102
Recurring [Member] \| Government sponsored enterprises [Member]
Assets:
Assets, Total	71,048,653		70,313,978
Recurring [Member] \| Asset-backed securities [Member]
Assets:
Assets, Total	120,889,297		107,328,618
Recurring [Member] \| Obligations of states and political subdivisions [Member]
Assets:
Assets, Total	34,291,010		34,109,303
Recurring [Member] \| Mortgage Servicing Rights [Member]
Assets:
Assets, Total	2,666,498
Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets:
Assets, Total
Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| U.S. treasury [Member]
Assets:
Assets, Total
Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Government sponsored enterprises [Member]
Assets:
Assets, Total
Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Asset-backed securities [Member]
Assets:
Assets, Total
Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Obligations of states and political subdivisions [Member]
Assets:
Assets, Total
Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Mortgage Servicing Rights [Member]
Assets:
Assets, Total
Recurring [Member] \| Other Observable Inputs (Level 2) [Member]
Assets:
Assets, Total	228,269,741		213,806,001
Recurring [Member] \| Other Observable Inputs (Level 2) [Member] \| U.S. treasury [Member]
Assets:
Assets, Total	2,040,781		2,054,102
Recurring [Member] \| Other Observable Inputs (Level 2) [Member] \| Government sponsored enterprises [Member]
Assets:
Assets, Total	71,048,653		70,313,978
Recurring [Member] \| Other Observable Inputs (Level 2) [Member] \| Asset-backed securities [Member]
Assets:
Assets, Total	120,889,297		107,328,618
Recurring [Member] \| Other Observable Inputs (Level 2) [Member] \| Obligations of states and political subdivisions [Member]
Assets:
Assets, Total	34,291,010		34,109,303
Recurring [Member] \| Other Observable Inputs (Level 2) [Member] \| Mortgage Servicing Rights [Member]
Assets:
Assets, Total
Recurring [Member] \| Net Significant Unobservable Inputs (Level 3) [Member]
Assets:
Assets, Total	2,666,498
Recurring [Member] \| Net Significant Unobservable Inputs (Level 3) [Member] \| U.S. treasury [Member]
Assets:
Assets, Total
Recurring [Member] \| Net Significant Unobservable Inputs (Level 3) [Member] \| Government sponsored enterprises [Member]
Assets:
Assets, Total
Recurring [Member] \| Net Significant Unobservable Inputs (Level 3) [Member] \| Asset-backed securities [Member]
Assets:
Assets, Total
Recurring [Member] \| Net Significant Unobservable Inputs (Level 3) [Member] \| Obligations of states and political subdivisions [Member]
Assets:
Assets, Total
Recurring [Member] \| Net Significant Unobservable Inputs (Level 3) [Member] \| Mortgage Servicing Rights [Member]
Assets:
Assets, Total	$ 2,666,498