Fair Value Measurements, Assets and Liabilities on a Nonrecurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2020	Sep. 30, 2020	Dec. 31, 2019
Readily Available Market Prices [Member]
Loans
Agricultural	$ 0	$ 0	$ 0
Commercial and financial	0	0	0
Real Estate:
Construction, land development and commercial	0	0	0
Mortgage, farmland	0	0	0
Mortgage, 1 to 4 family first liens	0	0	0
Mortgage, 1 to 4 family junior liens	0	0	0
Mortgage, multi-family	0	0	0
Mortgage, commercial	0	0	0
Loans to individuals	0	0	0
Total financial instrument assets	712,573	712,573	370,550
Observable Market Prices [Member]
Loans
Agricultural	0	0	0
Commercial and financial	0	0	0
Real Estate:
Construction, land development and commercial	0	0	0
Mortgage, farmland	0	0	0
Mortgage, 1 to 4 family first liens	0	0	0
Mortgage, 1 to 4 family junior liens	0	0	0
Mortgage, multi-family	0	0	0
Mortgage, commercial	0	0	0
Loans to individuals	0	0	0
Total financial instrument assets	276,504	276,504	258,625
Company Determined Market Prices [Member]
Loans
Agricultural	94,086	94,086	90,118
Commercial and financial	330,164	330,164	217,640
Real Estate:
Construction, land development and commercial	112,610	112,610	107,276
Mortgage, farmland	238,974	238,974	239,521
Mortgage, 1 to 4 family first liens	896,881	896,881	896,676
Mortgage, 1 to 4 family junior liens	127,667	127,667	143,261
Mortgage, multi-family	367,834	367,834	349,663
Mortgage, commercial	413,699	413,699	395,838
Loans to individuals	30,070	30,070	32,722
Total financial instrument assets	2,738,749	2,738,749	2,603,233
Nonrecurring Basis [Member]
Loans
Agricultural	1,376	1,376	1,272
Commercial and financial	1,843	1,843	1,803
Real Estate:
Construction, 1 to 4 family residential	419	419	0
Construction, land development and commercial	315	315	215
Mortgage, farmland	2,062	2,062	3,576
Mortgage, 1 to 4 family first liens	6,702	6,702	7,986
Mortgage, 1 to 4 family junior liens	158	158	49
Mortgage, multi-family	1,786	1,786	1,816
Mortgage, commercial	3,094	3,094	1,237
Loans to individuals	0	0	0
Foreclosed assets	0	0	0
Total financial instrument assets	17,755	17,755	17,954
Total Losses	195	811	1,038
Nonrecurring Basis [Member] \| Agricultural [Member]
Real Estate:
Total Losses	0	0	36
Nonrecurring Basis [Member] \| Commercial and financial [Member]
Real Estate:
Total Losses	0	385	499
Nonrecurring Basis [Member] \| Real Estate: Construction, 1 to 4 family residential [Member]
Real Estate:
Total Losses	0	0	0
Nonrecurring Basis [Member] \| Real Estate: Construction, land development and commercial [Member]
Real Estate:
Total Losses	0	0	8
Nonrecurring Basis [Member] \| Real Estate: Mortgage, farmland [Member]
Real Estate:
Total Losses	0	0	0
Nonrecurring Basis [Member] \| Real Estate: Mortgage, 1 to 4 family first liens [Member]
Real Estate:
Total Losses	20	176	370
Nonrecurring Basis [Member] \| Real Estate: Mortgage, 1 to 4 family junior liens [Member]
Real Estate:
Total Losses	0	0	0
Nonrecurring Basis [Member] \| Real Estate: Mortgage, multi-family [Member]
Real Estate:
Total Losses	0	0	0
Nonrecurring Basis [Member] \| Real Estate: Mortgage, commercial [Member]
Real Estate:
Total Losses	175	250	125
Nonrecurring Basis [Member] \| Loans to individuals [Member]
Real Estate:
Total Losses	0	0	0
Nonrecurring Basis [Member] \| Foreclosed assets [Member]
Real Estate:
Total Losses	0	0	0
Nonrecurring Basis [Member] \| Readily Available Market Prices [Member]
Loans
Agricultural	0	0	0
Commercial and financial	0	0	0
Real Estate:
Construction, 1 to 4 family residential	0	0	0
Construction, land development and commercial	0	0	0
Mortgage, farmland	0	0	0
Mortgage, 1 to 4 family first liens	0	0	0
Mortgage, 1 to 4 family junior liens	0	0	0
Mortgage, multi-family	0	0	0
Mortgage, commercial	0	0	0
Loans to individuals	0	0	0
Foreclosed assets	0	0	0
Total financial instrument assets	0	0	0
Nonrecurring Basis [Member] \| Observable Market Prices [Member]
Loans
Agricultural	0	0	0
Commercial and financial	0	0	0
Real Estate:
Construction, 1 to 4 family residential	0	0	0
Construction, land development and commercial	0	0	0
Mortgage, farmland	0	0	0
Mortgage, 1 to 4 family first liens	0	0	0
Mortgage, 1 to 4 family junior liens	0	0	0
Mortgage, multi-family	0	0	0
Mortgage, commercial	0	0	0
Loans to individuals	0	0	0
Foreclosed assets	0	0	0
Total financial instrument assets	0	0	0
Nonrecurring Basis [Member] \| Company Determined Market Prices [Member]
Loans
Agricultural	1,376	1,376	1,272
Commercial and financial	1,843	1,843	1,803
Real Estate:
Construction, 1 to 4 family residential	419	419	0
Construction, land development and commercial	315	315	215
Mortgage, farmland	2,062	2,062	3,576
Mortgage, 1 to 4 family first liens	6,702	6,702	7,986
Mortgage, 1 to 4 family junior liens	158	158	49
Mortgage, multi-family	1,786	1,786	1,816
Mortgage, commercial	3,094	3,094	1,237
Loans to individuals	0	0	0
Foreclosed assets	0	0	0
Total financial instrument assets	$ 17,755	$ 17,755	$ 17,954

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents agricultural loans held as presented on the statement of financial position which are due the Company as of the balance sheet date.

No definition available.