Fair Value Measurements, Assets and Liabilities on a Nonrecurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Readily Available Market Prices [Member]
Loans
Agricultural	$ 0	$ 0	$ 0
Commercial and financial	0	0	0
Real Estate [Abstract]
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	528,567	528,567	370,550
Observable Market Prices [Member]
Loans
Agricultural	0	0	0
Commercial and financial	0	0	0
Real Estate [Abstract]
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	271,202	271,202	258,625
Company Determined Market Prices [Member]
Loans
Agricultural	91,587	91,587	90,118
Commercial and financial	330,081	330,081	217,640
Real Estate [Abstract]
Construction, land development and commercial	107,721	107,721	107,276
Mortgage, farmland	241,181	241,181	239,521
Mortgage, 1 to 4 family first liens	884,014	884,014	896,676
Mortgage, 1 to 4 family junior liens	131,623	131,623	143,261
Mortgage, multi-family	357,011	357,011	349,663
Mortgage, commercial	408,630	408,630	395,838
Loans to individuals	30,074	30,074	32,722
Total financial instrument assets	2,715,516	2,715,516	2,603,233
Nonrecurring Basis [Member]
Loans
Agricultural	1,402	1,402	1,272
Commercial and financial	1,738	1,738	1,803
Real Estate [Abstract]
Construction, 1 to 4 family residential	566	566	0
Construction, land development and commercial	423	423	215
Mortgage, farmland	2,418	2,418	3,576
Mortgage, 1 to 4 family first liens	7,783	7,783	7,986
Mortgage, 1 to 4 family junior liens	191	191	49
Mortgage, multi-family	1,798	1,798	1,816
Mortgage, commercial	2,000	2,000	1,237
Loans to individuals	0	0	0
Foreclosed assets	0	0	0
Total financial instrument assets	18,319	18,319	17,954
Total Losses	523	616	1,038
Nonrecurring Basis [Member] \| Agricultural [Member]
Real Estate [Abstract]
Total Losses	0	0	36
Nonrecurring Basis [Member] \| Commercial and financial [Member]
Real Estate [Abstract]
Total Losses	385	385	499
Nonrecurring Basis [Member] \| Real Estate: Construction, 1 to 4 family residential [Member]
Real Estate [Abstract]
Total Losses	0	0	0
Nonrecurring Basis [Member] \| Real Estate: Construction, land development and commercial [Member]
Real Estate [Abstract]
Total Losses	0	0	8
Nonrecurring Basis [Member] \| Real Estate: Mortgage, farmland [Member]
Real Estate [Abstract]
Total Losses	0	0	0
Nonrecurring Basis [Member] \| Real Estate: Mortgage, 1 to 4 family first liens [Member]
Real Estate [Abstract]
Total Losses	63	156	370
Nonrecurring Basis [Member] \| Real Estate: Mortgage, 1 to 4 family junior liens [Member]
Real Estate [Abstract]
Total Losses	0	0	0
Nonrecurring Basis [Member] \| Real Estate: Mortgage, multi-family [Member]
Real Estate [Abstract]
Total Losses	0	0	0
Nonrecurring Basis [Member] \| Real Estate: Mortgage, commercial [Member]
Real Estate [Abstract]
Total Losses	75	75	125
Nonrecurring Basis [Member] \| Loans to individuals [Member]
Real Estate [Abstract]
Total Losses	0	0	0
Nonrecurring Basis [Member] \| Foreclosed assets [Member]
Real Estate [Abstract]
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 [Abstract]
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 [Abstract]
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	1,402	1,402	1,272
Commercial and financial	1,738	1,738	1,803
Real Estate [Abstract]
Construction, 1 to 4 family residential	566	566	0
Construction, land development and commercial	423	423	215
Mortgage, farmland	2,418	2,418	3,576
Mortgage, 1 to 4 family first liens	7,783	7,783	7,986
Mortgage, 1 to 4 family junior liens	191	191	49
Mortgage, multi-family	1,798	1,798	1,816
Mortgage, commercial	2,000	2,000	1,237
Loans to individuals	0	0	0
Foreclosed assets	0	0	0
Total financial instrument assets	$ 18,319	$ 18,319	$ 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.