Loans Receivable and Allowance for Credit Losses (Summary of Recorded Investment by Internal Risk Rating Systems) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 1,603,877,000	$ 1,474,424,000
Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	134,225,000
2022	194,063,000
2021	146,073,000
2020	94,987,000
2019	93,173,000
Prior	239,295,000
Revolving Loans Amortized Cost Basis	69,741,000
Total	971,557,000
Aggregate Pass and Criticized Categories [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		942,993,000
Pass [Member] | Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	132,372,000
2022	191,606,000
2021	145,229,000
2020	90,219,000
2019	92,513,000
Prior	229,990,000
Revolving Loans Amortized Cost Basis	63,589,000
Total	945,518,000
Pass [Member] | Aggregate Pass and Criticized Categories [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		934,256,000
Special Mention [Member] | Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	1,853,000
2022	1,823,000
2021	502,000
2020	1,650,000
2019	505,000
Prior	6,835,000
Revolving Loans Amortized Cost Basis	2,652,000
Total	15,820,000
Special Mention [Member] | Aggregate Pass and Criticized Categories [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		2,187,000
Substandard [Member] | Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2022	634,000
2021	342,000
2020	3,118,000
2019	155,000
Prior	2,470,000
Revolving Loans Amortized Cost Basis	3,500,000
Total	10,219,000
Substandard [Member] | Aggregate Pass and Criticized Categories [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		6,550,000
Commercial Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	675,156,000	651,544,000
Commercial Real Estate Loans [Member] | Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	79,796,000
2022	132,359,000
2021	112,345,000
2020	68,724,000
2019	72,516,000
Prior	194,505,000
Revolving Loans Amortized Cost Basis	14,911,000
Total	675,156,000
Current period gross charge-offs, 2019	112,000
Current period gross charge-offs, Prior	42,000
Current period gross charge-offs, Total	154,000
Commercial Real Estate Loans [Member] | Aggregate Pass and Criticized Categories [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		651,544,000
Commercial Real Estate Loans [Member] | Pass [Member] | Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	78,496,000
2022	131,948,000
2021	112,102,000
2020	65,949,000
2019	72,480,000
Prior	186,116,000
Revolving Loans Amortized Cost Basis	13,332,000
Total	660,423,000
Commercial Real Estate Loans [Member] | Pass [Member] | Aggregate Pass and Criticized Categories [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		646,775,000
Commercial Real Estate Loans [Member] | Special Mention [Member] | Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	1,300,000
2022	411,000
2021	243,000
2020	1,331,000
Prior	6,157,000
Revolving Loans Amortized Cost Basis	1,579,000
Total	11,021,000
Commercial Real Estate Loans [Member] | Special Mention [Member] | Aggregate Pass and Criticized Categories [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		1,079,000
Commercial Real Estate Loans [Member] | Substandard [Member] | Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2020	1,444,000
2019	36,000
Prior	2,232,000
Total	3,712,000
Commercial Real Estate Loans [Member] | Substandard [Member] | Aggregate Pass and Criticized Categories [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		3,690,000
Agricultural Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	63,859,000	68,915,000
Agricultural Real Estate Loans [Member] | Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	2,635,000
2022	13,017,000
2021	5,433,000
2020	8,624,000
2019	8,145,000
Prior	25,333,000
Revolving Loans Amortized Cost Basis	672,000
Total	63,859,000
Agricultural Real Estate Loans [Member] | Aggregate Pass and Criticized Categories [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		68,915,000
Agricultural Real Estate Loans [Member] | Pass [Member] | Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	2,635,000
2022	12,509,000
2021	5,433,000
2020	7,606,000
2019	7,746,000
Prior	24,654,000
Revolving Loans Amortized Cost Basis	522,000
Total	61,105,000
Agricultural Real Estate Loans [Member] | Pass [Member] | Aggregate Pass and Criticized Categories [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		66,444,000
Agricultural Real Estate Loans [Member] | Special Mention [Member] | Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2019	399,000
Prior	490,000
Revolving Loans Amortized Cost Basis	150,000
Total	1,039,000
Agricultural Real Estate Loans [Member] | Special Mention [Member] | Aggregate Pass and Criticized Categories [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		368,000
Agricultural Real Estate Loans [Member] | Substandard [Member] | Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2022	508,000
2020	1,018,000
Prior	189,000
Total	1,715,000
Agricultural Real Estate Loans [Member] | Substandard [Member] | Aggregate Pass and Criticized Categories [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		2,103,000
Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	200,576,000	187,257,000
Commercial Loans [Member] | Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	49,124,000
2022	43,401,000
2021	25,042,000
2020	14,542,000
2019	9,934,000
Prior	15,621,000
Revolving Loans Amortized Cost Basis	42,912,000
Total	200,576,000
Current period gross charge-offs, 2022	32,000
Current period gross charge-offs, 2021	24,000
Current period gross charge-offs, 2020	4,856,000
Current period gross charge-offs, Prior	41,000
Current period gross charge-offs, Total	4,953,000
Commercial Loans [Member] | Aggregate Pass and Criticized Categories [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		187,257,000
Commercial Loans [Member] | Pass [Member] | Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	48,571,000
2022	41,863,000
2021	24,443,000
2020	13,752,000
2019	9,914,000
Prior	15,384,000
Revolving Loans Amortized Cost Basis	38,644,000
Total	192,571,000
Commercial Loans [Member] | Pass [Member] | Aggregate Pass and Criticized Categories [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		186,966,000
Commercial Loans [Member] | Special Mention [Member] | Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	553,000
2022	1,412,000
2021	257,000
2020	134,000
2019	20,000
Prior	188,000
Revolving Loans Amortized Cost Basis	768,000
Total	3,332,000
Commercial Loans [Member] | Special Mention [Member] | Aggregate Pass and Criticized Categories [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		184,000
Commercial Loans [Member] | Substandard [Member] | Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2022	126,000
2021	342,000
2020	656,000
Prior	49,000
Revolving Loans Amortized Cost Basis	3,500,000
Total	4,673,000
Commercial Loans [Member] | Substandard [Member] | Aggregate Pass and Criticized Categories [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		107,000
Other Agricultural Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	31,966,000	35,277,000
Other Agricultural Loans [Member] | Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	2,670,000
2022	5,286,000
2021	3,253,000
2020	3,097,000
2019	2,578,000
Prior	3,836,000
Revolving Loans Amortized Cost Basis	11,246,000
Total	31,966,000
Other Agricultural Loans [Member] | Aggregate Pass and Criticized Categories [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		35,277,000
Other Agricultural Loans [Member] | Pass [Member] | Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	2,670,000
2022	5,286,000
2021	3,251,000
2020	2,912,000
2019	2,373,000
Prior	3,836,000
Revolving Loans Amortized Cost Basis	11,091,000
Total	31,419,000
Other Agricultural Loans [Member] | Pass [Member] | Aggregate Pass and Criticized Categories [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		34,071,000
Other Agricultural Loans [Member] | Special Mention [Member] | Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	2,000
2020	185,000
2019	86,000
Revolving Loans Amortized Cost Basis	155,000
Total	428,000
Other Agricultural Loans [Member] | Special Mention [Member] | Aggregate Pass and Criticized Categories [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		556,000
Other Agricultural Loans [Member] | Substandard [Member] | Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2019	119,000
Total	$ 119,000
Other Agricultural Loans [Member] | Substandard [Member] | Aggregate Pass and Criticized Categories [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		$ 650,000