Loans Receivable and Allowance for Credit Losses (Summary of Recorded Investment by Internal Risk Rating Systems) (Details) - USD ($)	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 1,714,082,000	$ 1,603,877,000
Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans, Current Fiscal Year	171,467,000	134,225,000
Total Loans, Fiscal Year Before Latest Fiscal Year	114,199,000	194,063,000
Total Loans, Two Years Before Latest Fiscal Year	167,819,000	146,073,000
Total Loans, Three Years Before Latest Fiscal Year	133,394,000	94,987,000
Total Loans, Four Years Before Latest Fiscal Year	81,861,000	93,173,000
Total Loans, Prior	277,003,000	239,295,000
Revolving Loans Amortized Cost Basis	76,688,000	69,741,000
Total	1,022,431,000	971,557,000
Pass [Member] \| Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans, Current Fiscal Year	171,327,000	132,372,000
Total Loans, Fiscal Year Before Latest Fiscal Year	113,922,000	191,606,000
Total Loans, Two Years Before Latest Fiscal Year	167,103,000	145,229,000
Total Loans, Three Years Before Latest Fiscal Year	130,222,000	90,219,000
Total Loans, Four Years Before Latest Fiscal Year	80,456,000	92,513,000
Total Loans, Prior	265,868,000	229,990,000
Revolving Loans Amortized Cost Basis	73,768,000	63,589,000
Total	1,002,666,000	945,518,000
Special Mention [Member] \| Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans, Current Fiscal Year	5,000	1,853,000
Total Loans, Fiscal Year Before Latest Fiscal Year		1,823,000
Total Loans, Two Years Before Latest Fiscal Year	287,000	502,000
Total Loans, Three Years Before Latest Fiscal Year		1,650,000
Total Loans, Four Years Before Latest Fiscal Year		505,000
Total Loans, Prior	3,154,000	6,835,000
Revolving Loans Amortized Cost Basis	164,000	2,652,000
Total	3,610,000	15,820,000
Substandard [Member] \| Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans, Current Fiscal Year	135,000
Total Loans, Fiscal Year Before Latest Fiscal Year	277,000	634,000
Total Loans, Two Years Before Latest Fiscal Year	429,000	342,000
Total Loans, Three Years Before Latest Fiscal Year	3,172,000	3,118,000
Total Loans, Four Years Before Latest Fiscal Year	1,405,000	155,000
Total Loans, Prior	7,981,000	2,470,000
Revolving Loans Amortized Cost Basis	2,756,000	3,500,000
Total	16,155,000	10,219,000
Commercial Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	716,875,000	675,156,000
Commercial Real Estate Loans [Member] \| Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans, Current Fiscal Year	102,913,000	79,796,000
Total Loans, Fiscal Year Before Latest Fiscal Year	74,242,000	132,359,000
Total Loans, Two Years Before Latest Fiscal Year	122,143,000	112,345,000
Total Loans, Three Years Before Latest Fiscal Year	107,181,000	68,724,000
Total Loans, Four Years Before Latest Fiscal Year	62,346,000	72,516,000
Total Loans, Prior	226,821,000	194,505,000
Revolving Loans Amortized Cost Basis	21,229,000	14,911,000
Total	716,875,000	675,156,000
Current period gross charge-offs, Four Years Before Latest Fiscal Year		112,000
Current period gross charge-offs, Prior		42,000
Current period gross charge-offs, Total		154,000
Commercial Real Estate Loans [Member] \| Pass [Member] \| Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans, Current Fiscal Year	102,773,000	78,496,000
Total Loans, Fiscal Year Before Latest Fiscal Year	74,242,000	131,948,000
Total Loans, Two Years Before Latest Fiscal Year	121,881,000	112,102,000
Total Loans, Three Years Before Latest Fiscal Year	104,720,000	65,949,000
Total Loans, Four Years Before Latest Fiscal Year	60,941,000	72,480,000
Total Loans, Prior	217,435,000	186,116,000
Revolving Loans Amortized Cost Basis	20,829,000	13,332,000
Total	702,821,000	660,423,000
Commercial Real Estate Loans [Member] \| Special Mention [Member] \| Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans, Current Fiscal Year	5,000	1,300,000
Total Loans, Fiscal Year Before Latest Fiscal Year		411,000
Total Loans, Two Years Before Latest Fiscal Year	262,000	243,000
Total Loans, Three Years Before Latest Fiscal Year		1,331,000
Total Loans, Prior	2,148,000	6,157,000
Revolving Loans Amortized Cost Basis		1,579,000
Total	2,415,000	11,021,000
Commercial Real Estate Loans [Member] \| Substandard [Member] \| Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans, Current Fiscal Year	135,000
Total Loans, Three Years Before Latest Fiscal Year	2,461,000	1,444,000
Total Loans, Four Years Before Latest Fiscal Year	1,405,000	36,000
Total Loans, Prior	7,238,000	2,232,000
Revolving Loans Amortized Cost Basis	400,000
Total	11,639,000	3,712,000
Agricultural Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	63,488,000	63,859,000
Agricultural Real Estate Loans [Member] \| Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans, Current Fiscal Year	6,257,000	2,635,000
Total Loans, Fiscal Year Before Latest Fiscal Year	3,756,000	13,017,000
Total Loans, Two Years Before Latest Fiscal Year	12,036,000	5,433,000
Total Loans, Three Years Before Latest Fiscal Year	3,960,000	8,624,000
Total Loans, Four Years Before Latest Fiscal Year	7,148,000	8,145,000
Total Loans, Prior	29,811,000	25,333,000
Revolving Loans Amortized Cost Basis	520,000	672,000
Total	63,488,000	63,859,000
Agricultural Real Estate Loans [Member] \| Pass [Member] \| Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans, Current Fiscal Year	6,257,000	2,635,000
Total Loans, Fiscal Year Before Latest Fiscal Year	3,756,000	12,509,000
Total Loans, Two Years Before Latest Fiscal Year	12,036,000	5,433,000
Total Loans, Three Years Before Latest Fiscal Year	3,960,000	7,606,000
Total Loans, Four Years Before Latest Fiscal Year	7,148,000	7,746,000
Total Loans, Prior	29,038,000	24,654,000
Revolving Loans Amortized Cost Basis	336,000	522,000
Total	62,531,000	61,105,000
Agricultural Real Estate Loans [Member] \| Special Mention [Member] \| Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans, Four Years Before Latest Fiscal Year		399,000
Total Loans, Prior	773,000	490,000
Revolving Loans Amortized Cost Basis	150,000	150,000
Total	923,000	1,039,000
Agricultural Real Estate Loans [Member] \| Substandard [Member] \| Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans, Fiscal Year Before Latest Fiscal Year		508,000
Total Loans, Three Years Before Latest Fiscal Year		1,018,000
Total Loans, Prior		189,000
Revolving Loans Amortized Cost Basis	34,000
Total	34,000	1,715,000
Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	211,991,000	200,576,000
Commercial Loans [Member] \| Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans, Current Fiscal Year	57,939,000	49,124,000
Total Loans, Fiscal Year Before Latest Fiscal Year	34,365,000	43,401,000
Total Loans, Two Years Before Latest Fiscal Year	29,919,000	25,042,000
Total Loans, Three Years Before Latest Fiscal Year	19,874,000	14,542,000
Total Loans, Four Years Before Latest Fiscal Year	10,233,000	9,934,000
Total Loans, Prior	15,891,000	15,621,000
Revolving Loans Amortized Cost Basis	43,770,000	42,912,000
Total	211,991,000	200,576,000
Current period gross charge-offs, Fiscal Year Before Latest Fiscal Year	11,000	32,000
Current period gross charge-offs, Two Years Before Latest Fiscal Year		24,000
Current period gross charge-offs, Three Years Before Latest Fiscal Year		4,856,000
Current period gross charge-offs, Four Years Before Latest Fiscal Year	8,000
Current period gross charge-offs, Prior	51,000	41,000
Current period gross charge-offs, Revolving loans amortized cost basis	30,000
Current period gross charge-offs, Total	100,000	4,953,000
Commercial Loans [Member] \| Pass [Member] \| Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans, Current Fiscal Year	57,939,000	48,571,000
Total Loans, Fiscal Year Before Latest Fiscal Year	34,088,000	41,863,000
Total Loans, Two Years Before Latest Fiscal Year	29,465,000	24,443,000
Total Loans, Three Years Before Latest Fiscal Year	19,163,000	13,752,000
Total Loans, Four Years Before Latest Fiscal Year	10,233,000	9,914,000
Total Loans, Prior	15,042,000	15,384,000
Revolving Loans Amortized Cost Basis	42,906,000	38,644,000
Total	208,836,000	192,571,000
Commercial Loans [Member] \| Special Mention [Member] \| Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans, Current Fiscal Year		553,000
Total Loans, Fiscal Year Before Latest Fiscal Year		1,412,000
Total Loans, Two Years Before Latest Fiscal Year	25,000	257,000
Total Loans, Three Years Before Latest Fiscal Year		134,000
Total Loans, Four Years Before Latest Fiscal Year		20,000
Total Loans, Prior	106,000	188,000
Revolving Loans Amortized Cost Basis	14,000	768,000
Total	145,000	3,332,000
Commercial Loans [Member] \| Substandard [Member] \| Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans, Fiscal Year Before Latest Fiscal Year	277,000	126,000
Total Loans, Two Years Before Latest Fiscal Year	429,000	342,000
Total Loans, Three Years Before Latest Fiscal Year	711,000	656,000
Total Loans, Prior	743,000	49,000
Revolving Loans Amortized Cost Basis	850,000	3,500,000
Total	3,010,000	4,673,000
Other Agricultural Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	30,077,000	31,966,000
Other Agricultural Loans [Member] \| Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans, Current Fiscal Year	4,358,000	2,670,000
Total Loans, Fiscal Year Before Latest Fiscal Year	1,836,000	5,286,000
Total Loans, Two Years Before Latest Fiscal Year	3,721,000	3,253,000
Total Loans, Three Years Before Latest Fiscal Year	2,379,000	3,097,000
Total Loans, Four Years Before Latest Fiscal Year	2,134,000	2,578,000
Total Loans, Prior	4,480,000	3,836,000
Revolving Loans Amortized Cost Basis	11,169,000	11,246,000
Total	30,077,000	31,966,000
Other Agricultural Loans [Member] \| Pass [Member] \| Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans, Current Fiscal Year	4,358,000	2,670,000
Total Loans, Fiscal Year Before Latest Fiscal Year	1,836,000	5,286,000
Total Loans, Two Years Before Latest Fiscal Year	3,721,000	3,251,000
Total Loans, Three Years Before Latest Fiscal Year	2,379,000	2,912,000
Total Loans, Four Years Before Latest Fiscal Year	2,134,000	2,373,000
Total Loans, Prior	4,353,000	3,836,000
Revolving Loans Amortized Cost Basis	9,697,000	11,091,000
Total	28,478,000	31,419,000
Other Agricultural Loans [Member] \| Special Mention [Member] \| Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans, Two Years Before Latest Fiscal Year		2,000
Total Loans, Three Years Before Latest Fiscal Year		185,000
Total Loans, Four Years Before Latest Fiscal Year		86,000
Total Loans, Prior	127,000
Revolving Loans Amortized Cost Basis		155,000
Total	127,000	428,000
Other Agricultural Loans [Member] \| Substandard [Member] \| Non-Homogenous Pools [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans, Four Years Before Latest Fiscal Year		119,000
Revolving Loans Amortized Cost Basis	1,472,000
Total	$ 1,472,000	$ 119,000

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