XML 34 R24.htm IDEA: XBRL DOCUMENT v3.8.0.1
Investment Securities - Estimated Fair Value and Amortized Cost by Contractual Maturity of Company's Investment Securities (Detail) - USD ($)
Sep. 30, 2017
Dec. 31, 2016
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Securities available for sale, One Year or Less, Fair Value $ 2,640,000  
Securities available for sale, One Year to Five Years, Fair Value 22,228,000  
Securities available for sale, Five to Ten Years, Fair Value 49,413,000  
Securities available for sale, Over Ten Years, Fair Value 127,915,000  
Total available for sale, Fair Value 202,196,322 $ 183,729,857
Total held to maturity, Fair Value 13,246,498 13,362,062
Investment securities, One Year or Less, Fair Value 2,640,000  
Investment securities, One Year to Five Years, Fair Value 27,646,000  
Investment securities, Five to Ten Years, Fair Value 55,600,000  
Investment securities, Over Ten Years, Fair Value 129,556,000  
Total investment securities, Fair Value 215,442,000  
Securities available for sale, Amortized Cost, One Year or Less 2,631,000  
Securities available for sale, Amortized Cost, One Year to Five Years 22,036,000  
Securities available for sale, Amortized Cost, Five to Ten Years 49,314,000  
Securities available for sale, Amortized Cost, Over Ten Years 128,095,000  
Available for sale, Amortized Cost 202,076,000 183,712,000
Held to maturity, Amortized Cost 13,117,994 13,365,479
Investment securities, Amortized Cost, One Year or Less 2,631,000  
Investment securities, Amortized Cost, One Year to Five Years 27,405,000  
Investment securities, Amortized Cost, Five to Ten Years 55,432,000  
Investment securities, Amortized Cost, Over Ten Years 129,726,000  
Total investment securities, Amortized Cost 215,194,000  
Municipal Bonds [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Securities available for sale, One Year or Less, Fair Value 1,541,000  
Securities available for sale, One Year to Five Years, Fair Value 9,560,000  
Securities available for sale, Five to Ten Years, Fair Value 6,864,000  
Securities available for sale, Over Ten Years, Fair Value 528,000  
Total available for sale, Fair Value 18,493,000 21,428,000
Securities held to maturity, One Year or Less, Fair Value 0  
Securities held to maturity, One Year to Five Years, Fair Value 5,418,000  
Securities held to maturity, Five to Ten Years, Fair Value 6,187,000  
Securities held to maturity, Over Ten Years, Fair Value 1,641,000  
Total held to maturity, Fair Value 13,246,000 13,362,000
Securities available for sale, Amortized Cost, One Year or Less 1,536,000  
Securities available for sale, Amortized Cost, One Year to Five Years 9,403,000  
Securities available for sale, Amortized Cost, Five to Ten Years 6,758,000  
Securities available for sale, Amortized Cost, Over Ten Years 505,000  
Available for sale, Amortized Cost 18,202,000 21,212,000
Securities held to maturity, Amortized Cost, One Year or Less 0  
Securities held to maturity, Amortized Cost, One Year to Five Years 5,369,000  
Securities held to maturity, Amortized Cost, Five to Ten Years 6,118,000  
Securities held to maturity, Amortized Cost, Over Ten Years 1,631,000  
Held to maturity, Amortized Cost 13,118,000 13,365,000
U.S. Agency Mortgage-Backed [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Securities available for sale, One Year or Less, Fair Value 97,000  
Securities available for sale, One Year to Five Years, Fair Value 5,935,000  
Securities available for sale, Five to Ten Years, Fair Value 33,317,000  
Securities available for sale, Over Ten Years, Fair Value 35,905,000  
Total available for sale, Fair Value 75,254,000 78,931,000
Securities available for sale, Amortized Cost, One Year or Less 95,000  
Securities available for sale, Amortized Cost, One Year to Five Years 5,916,000  
Securities available for sale, Amortized Cost, Five to Ten Years 33,322,000  
Securities available for sale, Amortized Cost, Over Ten Years 35,366,000  
Available for sale, Amortized Cost 74,699,000 78,361,000
Collateralized Mortgage Obligations [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Securities available for sale, One Year to Five Years, Fair Value 1,732,000  
Securities available for sale, Five to Ten Years, Fair Value 6,659,000  
Securities available for sale, Over Ten Years, Fair Value 91,482,000  
Total available for sale, Fair Value 99,873,000 74,330,000
Securities available for sale, Amortized Cost, One Year to Five Years 1,722,000  
Securities available for sale, Amortized Cost, Five to Ten Years 6,720,000  
Securities available for sale, Amortized Cost, Over Ten Years 92,224,000  
Available for sale, Amortized Cost 100,666,000 75,193,000
U.S. Government Agency [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Securities available for sale, One Year or Less, Fair Value 1,002,000  
Securities available for sale, One Year to Five Years, Fair Value 5,001,000  
Securities available for sale, Five to Ten Years, Fair Value 2,573,000  
Total available for sale, Fair Value 8,576,000 9,041,000
Securities available for sale, Amortized Cost, One Year or Less 1,000,000  
Securities available for sale, Amortized Cost, One Year to Five Years 4,995,000  
Securities available for sale, Amortized Cost, Five to Ten Years 2,514,000  
Available for sale, Amortized Cost $ 8,509,000 $ 8,946,000