Loans and Allowance for Loan Losses, Part II (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	$ 3,692,000		$ 3,692,000		$ 3,478,000
Current	1,311,495,000		1,311,495,000		1,278,411,000
Total Loans Receivable	1,315,187,000		1,315,187,000		1,281,889,000
Total Loans 90 Days & Accruing	0		$ 0		0
Number of days past due when interest is not accrued			ninety days
Period of satisfactory performance before returning to accrual status			not less than six months
Loans with a specific allowance [Abstract]
Recorded Balance	2,006,000		$ 2,006,000		1,174,000
Unpaid Principal Balance	2,421,000		2,421,000		1,174,000
Specific Allowance	297,000		297,000		134,000
Loans without a specific allowance [Abstract]
Recorded Balance	2,624,000		2,624,000		2,835,000
Unpaid Principal Balance	3,275,000		3,275,000		4,016,000
Total Loans [Abstract]
Recorded Balance	4,630,000		4,630,000		4,009,000
Unpaid Principal Balance	5,696,000		5,696,000		5,190,000
Average recorded investment and interest income recognized [Abstract]
Average investment in impaired loans	5,096,000	$ 3,097,000	5,219,000	$ 3,137,000
Interest income recognized	5,000	6,000	9,000	10,000
Balances of Nonaccrual Loans [Abstract]
Recorded balance of nonaccrual loans	4,311,000		4,311,000		3,412,000
Interest Lost on Nonaccrual Loans			80,000	$ 39,000
Troubled Debt Restructuring [Abstract]
Troubled Debt Restructurings Balance	1,626,000		1,626,000		1,743,000
Financing Receivable Modifications Performing Recorded Investment	319,000		$ 319,000		601,000
Recorded Balance of Troubled Debt Restructurings [Abstract]
Financing Receivables, Modifications during Period, Number			5	10
Financing Receivables, Modifications during Period, Balance			$ 357,000	$ 768,000
Subsequent Default, Number of Days Past Due			90 days
Financing Receivable, Modifications, Subsequent Default, Number of Contracts			1
Real Estate Acquired Through Foreclosure	436,000		$ 436,000		477,000
Mortgage Loans Secured By Real Estate In Foreclosure			157,000	55,000
Pass
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	1,270,898,000		1,270,898,000		1,240,217,000
Watch
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	22,444,000		22,444,000		19,373,000
Substandard
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	21,845,000		21,845,000		22,299,000
Doubtful
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	0		0		0
Construction and land development
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	189,000		189,000		0
Current	33,623,000		33,623,000		39,209,000
Total Loans Receivable	33,812,000		33,812,000		39,209,000
Total Loans 90 Days & Accruing	0		0		0
Loans with a specific allowance [Abstract]
Recorded Balance	0		0		0
Unpaid Principal Balance	0		0		0
Specific Allowance	0		0		0
Loans without a specific allowance [Abstract]
Recorded Balance	234,000		234,000		142,000
Unpaid Principal Balance	485,000		485,000		707,000
Total Loans [Abstract]
Recorded Balance	234,000		234,000		142,000
Unpaid Principal Balance	485,000		485,000		707,000
Average recorded investment and interest income recognized [Abstract]
Average investment in impaired loans	580,000	154,000	632,000	154,000
Interest income recognized	0	0	0	$ 0
Balances of Nonaccrual Loans [Abstract]
Recorded balance of nonaccrual loans	234,000		234,000		142,000
Troubled Debt Restructuring [Abstract]
Troubled Debt Restructurings Balance	234,000		$ 234,000		142,000
Recorded Balance of Troubled Debt Restructurings [Abstract]
Financing Receivables, Modifications during Period, Number			1	0
Financing Receivables, Modifications during Period, Balance			$ 234,000	$ 0
Construction and land development | Pass
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	33,578,000		33,578,000		39,067,000
Construction and land development | Watch
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	0		0		0
Construction and land development | Substandard
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	234,000		234,000		142,000
Construction and land development | Doubtful
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	0		0		0
Agricultural real estate
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	561,000		561,000		106,000
Current	121,750,000		121,750,000		122,368,000
Total Loans Receivable	122,311,000		122,311,000		122,474,000
Total Loans 90 Days & Accruing	0		0		0
Loans with a specific allowance [Abstract]
Recorded Balance	430,000		430,000		430,000
Unpaid Principal Balance	430,000		430,000		430,000
Specific Allowance	0		0		0
Loans without a specific allowance [Abstract]
Recorded Balance	20,000		20,000		24,000
Unpaid Principal Balance	23,000		23,000		28,000
Total Loans [Abstract]
Recorded Balance	450,000		450,000		454,000
Unpaid Principal Balance	453,000		453,000		458,000
Average recorded investment and interest income recognized [Abstract]
Average investment in impaired loans	450,000	93,000	450,000	94,000
Interest income recognized	0	1,000	0	$ 2,000
Loans Receivable, Modifications, Still Accruing Interest	67,000		67,000
Balances of Nonaccrual Loans [Abstract]
Recorded balance of nonaccrual loans	450,000		450,000		454,000
Troubled Debt Restructuring [Abstract]
Troubled Debt Restructurings Balance	232,000		$ 232,000		232,000
Recorded Balance of Troubled Debt Restructurings [Abstract]
Financing Receivables, Modifications during Period, Number			0	1
Financing Receivables, Modifications during Period, Balance			$ 0	$ 23,000
Agricultural real estate | Pass
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	114,113,000		114,113,000		118,103,000
Agricultural real estate | Watch
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	6,017,000		6,017,000		2,282,000
Agricultural real estate | Substandard
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	2,181,000		2,181,000		2,089,000
Agricultural real estate | Doubtful
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	0		0		0
1-4 Family residential properties
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	1,150,000		1,150,000		1,955,000
Current	219,337,000		219,337,000		229,616,000
Total Loans Receivable	220,487,000		220,487,000		231,571,000
Total Loans 90 Days & Accruing	0		0		0
Loans with a specific allowance [Abstract]
Recorded Balance	0		0		0
Unpaid Principal Balance	0		0		0
Specific Allowance	0		0		0
Loans without a specific allowance [Abstract]
Recorded Balance	1,198,000		1,198,000		1,373,000
Unpaid Principal Balance	1,372,000		1,372,000		1,688,000
Total Loans [Abstract]
Recorded Balance	1,198,000		1,198,000		1,373,000
Unpaid Principal Balance	1,372,000		1,372,000		1,688,000
Average recorded investment and interest income recognized [Abstract]
Average investment in impaired loans	1,244,000	1,163,000	1,264,000	1,188,000
Interest income recognized	4,000	2,000	8,000	3,000
Loans Receivable, Modifications, Still Accruing Interest	253,000	342,000	253,000	$ 342,000
Balances of Nonaccrual Loans [Abstract]
Recorded balance of nonaccrual loans	945,000		945,000		975,000
Troubled Debt Restructuring [Abstract]
Troubled Debt Restructurings Balance	413,000		413,000		515,000
Financing Receivable Modifications Performing Recorded Investment	253,000		$ 253,000		397,000
Recorded Balance of Troubled Debt Restructurings [Abstract]
Financing Receivables, Modifications during Period, Number			1	4
Financing Receivables, Modifications during Period, Balance			$ 48,000	$ 79,000
1-4 Family residential properties | Pass
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	213,926,000		213,926,000		224,552,000
1-4 Family residential properties | Watch
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	1,059,000		1,059,000		1,454,000
1-4 Family residential properties | Substandard
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	5,502,000		5,502,000		5,565,000
1-4 Family residential properties | Doubtful
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	0		0		0
Multifamily residential properties
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	240,000		240,000		0
Current	46,975,000		46,975,000		45,740,000
Total Loans Receivable	47,215,000		47,215,000		45,740,000
Total Loans 90 Days & Accruing	0		0		0
Loans with a specific allowance [Abstract]
Recorded Balance	304,000		304,000		316,000
Unpaid Principal Balance	304,000		304,000		316,000
Specific Allowance	0		0		0
Loans without a specific allowance [Abstract]
Recorded Balance	0		0		1,000
Unpaid Principal Balance	0		0		1,000
Total Loans [Abstract]
Recorded Balance	304,000		304,000		317,000
Unpaid Principal Balance	304,000		304,000		317,000
Average recorded investment and interest income recognized [Abstract]
Average investment in impaired loans	305,000	0	307,000	0
Interest income recognized	0	0	0	0
Balances of Nonaccrual Loans [Abstract]
Recorded balance of nonaccrual loans	304,000		304,000		317,000
Multifamily residential properties | Pass
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	46,671,000		46,671,000		45,180,000
Multifamily residential properties | Watch
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	240,000		240,000		243,000
Multifamily residential properties | Substandard
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	304,000		304,000		317,000
Multifamily residential properties | Doubtful
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	0		0		0
Commercial real estate
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	521,000		521,000		349,000
Current	445,311,000		445,311,000		408,823,000
Total Loans Receivable	445,832,000		445,832,000		409,172,000
Total Loans 90 Days & Accruing	0		0		0
Loans with a specific allowance [Abstract]
Recorded Balance	848,000		848,000		0
Unpaid Principal Balance	848,000		848,000		0
Specific Allowance	208,000		208,000		0
Loans without a specific allowance [Abstract]
Recorded Balance	283,000		283,000		304,000
Unpaid Principal Balance	304,000		304,000		325,000
Total Loans [Abstract]
Recorded Balance	1,131,000		1,131,000		304,000
Unpaid Principal Balance	1,152,000		1,152,000		325,000
Average recorded investment and interest income recognized [Abstract]
Average investment in impaired loans	1,132,000	655,000	1,133,000	659,000
Interest income recognized	1,000	1,000	1,000	1,000
Loans Receivable, Modifications, Still Accruing Interest	34,000	36,000	34,000	36,000
Balances of Nonaccrual Loans [Abstract]
Recorded balance of nonaccrual loans	1,097,000		1,097,000		269,000
Troubled Debt Restructuring [Abstract]
Troubled Debt Restructurings Balance	118,000		118,000		124,000
Financing Receivable Modifications Performing Recorded Investment	34,000		34,000		36,000
Commercial real estate | Pass
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	424,934,000		424,934,000		386,769,000
Commercial real estate | Watch
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	9,565,000		9,565,000		10,498,000
Commercial real estate | Substandard
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	11,333,000		11,333,000		11,905,000
Commercial real estate | Doubtful
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	0		0		0
Agricultural loans
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	20,000		20,000		139,000
Current	72,756,000		72,756,000		75,747,000
Total Loans Receivable	72,776,000		72,776,000		75,886,000
Total Loans 90 Days & Accruing	0		0		0
Loans with a specific allowance [Abstract]
Recorded Balance	0		0		0
Unpaid Principal Balance	0		0		0
Specific Allowance	0		0		0
Loans without a specific allowance [Abstract]
Recorded Balance	15,000		15,000		79,000
Unpaid Principal Balance	15,000		15,000		79,000
Total Loans [Abstract]
Recorded Balance	15,000		15,000		79,000
Unpaid Principal Balance	15,000		15,000		79,000
Average recorded investment and interest income recognized [Abstract]
Average investment in impaired loans	15,000	0
Interest income recognized	0	0
Balances of Nonaccrual Loans [Abstract]
Recorded balance of nonaccrual loans	15,000		15,000		79,000
Agricultural loans | Pass
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	70,878,000		70,878,000		75,437,000
Agricultural loans | Watch
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	1,849,000		1,849,000		210,000
Agricultural loans | Substandard
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	49,000		49,000		239,000
Agricultural loans | Doubtful
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	0		0		0
Commercial and industrial loans
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	504,000		504,000		737,000
Current	300,583,000		300,583,000		304,323,000
Total Loans Receivable	301,087,000		301,087,000		305,060,000
Total Loans 90 Days & Accruing	0		0		0
Loans with a specific allowance [Abstract]
Recorded Balance	403,000		403,000		405,000
Unpaid Principal Balance	818,000		818,000		405,000
Specific Allowance	89,000		89,000		134,000
Loans without a specific allowance [Abstract]
Recorded Balance	633,000		633,000		670,000
Unpaid Principal Balance	831,000		831,000		932,000
Total Loans [Abstract]
Recorded Balance	1,036,000		1,036,000		1,075,000
Unpaid Principal Balance	1,649,000		1,649,000		1,337,000
Average recorded investment and interest income recognized [Abstract]
Average investment in impaired loans	1,100,000	584,000	1,143,000	594,000
Interest income recognized	0	1,000	0	$ 3,000
Loans Receivable, Modifications, Still Accruing Interest	22,000		22,000
Balances of Nonaccrual Loans [Abstract]
Recorded balance of nonaccrual loans	1,014,000		1,014,000		928,000
Troubled Debt Restructuring [Abstract]
Troubled Debt Restructurings Balance	415,000		415,000		491,000
Financing Receivable Modifications Performing Recorded Investment	22,000		$ 22,000		147,000
Recorded Balance of Troubled Debt Restructurings [Abstract]
Financing Receivables, Modifications during Period, Number			3	2
Financing Receivables, Modifications during Period, Balance			$ 75,000	$ 227,000
Commercial and industrial loans | Pass
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	295,484,000		295,484,000		298,633,000
Commercial and industrial loans | Watch
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	3,695,000		3,695,000		4,686,000
Commercial and industrial loans | Substandard
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	1,908,000		1,908,000		1,741,000
Commercial and industrial loans | Doubtful
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	0		0		0
Consumer loans
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	60,000		60,000		192,000
Current	37,989,000		37,989,000		41,387,000
Total Loans Receivable	38,049,000		38,049,000		41,579,000
Total Loans 90 Days & Accruing	0		0		0
Loans with a specific allowance [Abstract]
Recorded Balance	21,000		21,000		23,000
Unpaid Principal Balance	21,000		21,000		23,000
Specific Allowance	0		0		0
Loans without a specific allowance [Abstract]
Recorded Balance	231,000		231,000		242,000
Unpaid Principal Balance	235,000		235,000		256,000
Total Loans [Abstract]
Recorded Balance	252,000		252,000		265,000
Unpaid Principal Balance	256,000		256,000		279,000
Average recorded investment and interest income recognized [Abstract]
Average investment in impaired loans	260,000	448,000	264,000	448,000
Interest income recognized	0	1,000	0	1,000
Loans Receivable, Modifications, Still Accruing Interest	10,000	39,000	10,000	$ 39,000
Balances of Nonaccrual Loans [Abstract]
Recorded balance of nonaccrual loans	242,000		242,000		248,000
Troubled Debt Restructuring [Abstract]
Troubled Debt Restructurings Balance	214,000		214,000		239,000
Financing Receivable Modifications Performing Recorded Investment	10,000		$ 10,000		21,000
Recorded Balance of Troubled Debt Restructurings [Abstract]
Financing Receivables, Modifications during Period, Number			0	3
Financing Receivables, Modifications during Period, Balance			$ 0	$ 439,000
Consumer loans | Pass
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	37,696,000		37,696,000		41,278,000
Consumer loans | Watch
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	19,000		19,000		0
Consumer loans | Substandard
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	334,000		334,000		301,000
Consumer loans | Doubtful
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	0		0		0
All other loans
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	447,000		447,000		0
Current	33,171,000		33,171,000		11,198,000
Total Loans Receivable	33,618,000		33,618,000		11,198,000
Total Loans 90 Days & Accruing	0		0		0
Loans with a specific allowance [Abstract]
Recorded Balance	0		0		0
Unpaid Principal Balance	0		0		0
Specific Allowance	0		0		0
Loans without a specific allowance [Abstract]
Recorded Balance	10,000		10,000		0
Unpaid Principal Balance	10,000		10,000		0
Total Loans [Abstract]
Recorded Balance	10,000		10,000		0
Unpaid Principal Balance	10,000		10,000		0
Average recorded investment and interest income recognized [Abstract]
Average investment in impaired loans	10,000	0
Interest income recognized	0	0
Balances of Nonaccrual Loans [Abstract]
Recorded balance of nonaccrual loans	10,000		10,000		0
All other loans | Pass
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	33,618,000		33,618,000		11,198,000
All other loans | Watch
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	0		0		0
All other loans | Substandard
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	0		0		0
All other loans | Doubtful
Loans Receivable Aging Analysis [Abstract]
Total Loans Receivable	0		0		0
Loans secured by real estate
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	2,661,000		2,661,000		2,410,000
Current	866,996,000		866,996,000		845,756,000
Total Loans Receivable	869,657,000		869,657,000		848,166,000
Total Loans 90 Days & Accruing	0		0		0
Loans with a specific allowance [Abstract]
Recorded Balance	1,582,000		1,582,000		746,000
Unpaid Principal Balance	1,582,000		1,582,000		746,000
Specific Allowance	208,000		208,000		0
Loans without a specific allowance [Abstract]
Recorded Balance	1,735,000		1,735,000		1,844,000
Unpaid Principal Balance	2,184,000		2,184,000		2,749,000
Total Loans [Abstract]
Recorded Balance	3,317,000		3,317,000		2,590,000
Unpaid Principal Balance	3,766,000		3,766,000		3,495,000
Average recorded investment and interest income recognized [Abstract]
Average investment in impaired loans	3,711,000	2,065,000	3,786,000	2,095,000
Interest income recognized	5,000	$ 4,000	9,000	$ 6,000
Balances of Nonaccrual Loans [Abstract]
Recorded balance of nonaccrual loans	3,030,000		3,030,000		2,157,000
Troubled Debt Restructuring [Abstract]
Troubled Debt Restructurings Balance	997,000		997,000		1,013,000
Financing Receivable Modifications Performing Recorded Investment	287,000		$ 287,000		433,000
Recorded Balance of Troubled Debt Restructurings [Abstract]
Financing Receivables, Modifications during Period, Number			2	5
Financing Receivables, Modifications during Period, Balance			$ 282,000	$ 102,000
Financing Receivables, 30 to 59 Days Past Due [Member]
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	1,411,000		1,411,000		1,683,000
Financing Receivables, 30 to 59 Days Past Due [Member] | Construction and land development
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	0		0		0
Financing Receivables, 30 to 59 Days Past Due [Member] | Agricultural real estate
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	131,000		131,000		106,000
Financing Receivables, 30 to 59 Days Past Due [Member] | 1-4 Family residential properties
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	371,000		371,000		1,059,000
Financing Receivables, 30 to 59 Days Past Due [Member] | Multifamily residential properties
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	240,000		240,000		0
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial real estate
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	52,000		52,000		251,000
Financing Receivables, 30 to 59 Days Past Due [Member] | Agricultural loans
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	20,000		20,000		65,000
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial and industrial loans
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	108,000		108,000		65,000
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer loans
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	52,000		52,000		137,000
Financing Receivables, 30 to 59 Days Past Due [Member] | All other loans
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	437,000		437,000		0
Financing Receivables, 30 to 59 Days Past Due [Member] | Loans secured by real estate
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	794,000		794,000		1,416,000
Financing Receivables, 60 to 89 Days Past Due [Member]
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	1,294,000		1,294,000		1,401,000
Financing Receivables, 60 to 89 Days Past Due [Member] | Construction and land development
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	189,000		189,000		0
Financing Receivables, 60 to 89 Days Past Due [Member] | Agricultural real estate
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	430,000		430,000		0
Financing Receivables, 60 to 89 Days Past Due [Member] | 1-4 Family residential properties
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	554,000		554,000		742,000
Financing Receivables, 60 to 89 Days Past Due [Member] | Multifamily residential properties
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	0		0		0
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial real estate
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	0		0		67,000
Financing Receivables, 60 to 89 Days Past Due [Member] | Agricultural loans
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	0		0		74,000
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial and industrial loans
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	114,000		114,000		476,000
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer loans
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	7,000		7,000		42,000
Financing Receivables, 60 to 89 Days Past Due [Member] | All other loans
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	0		0		0
Financing Receivables, 60 to 89 Days Past Due [Member] | Loans secured by real estate
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	1,173,000		1,173,000		809,000
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	987,000		987,000		394,000
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Construction and land development
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	0		0		0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Agricultural real estate
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	0		0		0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | 1-4 Family residential properties
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	225,000		225,000		154,000
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Multifamily residential properties
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	0		0		0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial real estate
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	469,000		469,000		31,000
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Agricultural loans
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	0		0		0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial and industrial loans
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	282,000		282,000		196,000
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer loans
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	1,000		1,000		13,000
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | All other loans
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	10,000		10,000		0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans secured by real estate
Loans Receivable Aging Analysis [Abstract]
Financing Receivable, Recorded Investment, Past Due	$ 694,000		$ 694,000		$ 185,000