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Note 5 - Premises and Equipment | 12 Months Ended
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Dec. 31, 2017
Notes to Financial Statements |
Property, Plant and Equipment Disclosure [Text Block] | Note 5. Premises and Equipment The following summarizes the components of premises and equipment as of December 31, 2017 and 2016:
|  | 2017 |  |  | 2016 |
Land |  | $ | 13,466,930 |  |  | $ | 12,936,223 |
Buildings (useful lives 15 to 50 years) |  |  | 53,633,788 |  |  |  | 51,546,499 |
Furniture and equipment (useful lives 3 to 10 years) |  |  | 31,984,631 |  |  |  | 28,458,946 |
Premises and equipment |  |  | 99,085,349 |  |  |  | 92,941,668 |
Less accumulated depreciation |  |  | 36,247,094 |  |  |  | 32,298,160 |
Premises and equipment, net |  | $ | 62,838,255 |  |  | $ | 60,643,508 |
Certain facilities are leased under operating leases. Rental expense was $348,467, $334,977, and $339,839 for the years ended December 31, 2017, 2016, and 2015, respectively. Future minimum rental commitments under noncancelable leases are as follows as of December 31, 2017:
Year ending December 31: |  |  |  |
2018 |  |  | 363,791 |
2019 |  |  | 355,727 |
2020 |  |  | 259,798 |
2021 |  |  | 159,708 |
2022 |  |  | 91,969 |
Thereafter |  |  | 62,858 |
|  | $ | 1,293,851 |
During 2016, the Company entered into a material related party transaction with a n entity that is owned and controlled by a CRBT director. That business was chosen as the general contractor for the remodel of the Waterloo branch. The business was the original contractor for the branch and is recognized as a leader in Iowa and the Midwest market for the design and construction of financial services and professional office buildings. Based on the entity’s expertise, its experience as the original designer/builder of the branch location and a decline to bid from two other contractors, management chose the entity as the general contractor. Management determined that the bids received from the entity were at market rates. The project total was estimated at $3.7 million. This was the full contract price, as subcontractors will be utilized to complete the work. It is estimated that the entity received $2.2 million for its work as the general contractor, including payments for a portion of the actual construction costs as the entity completed a portion of the subcontracting work in addition to being the general contractor. As of December 31, 2017, the project was complete and there was no outstanding commitment remaining.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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