Borrowings (Tables)

12 Months Ended

Dec. 31, 2023

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

The Company has access to various sources of funds that allow for management of interest rate exposure and liquidity. The following table summarizes the Company's outstanding borrowings and weighted average interest rates as of December 31, 2023 and 2022:

	Outstanding Balance				Weighted Average Interest Rate
	December 31,				December 31,
	2023		2022		2023		2022
Securities sold under agreements to repurchase     and federal funds purchased	$	108,764	$	86,945	5.05	%	3.78	%
FHLB advances	—		175,000		—	%	4.44	%
Bank Term Funding Program	130,000		—		4.85	%	—	%
Subordinated debt, net	129,645		126,101		5.52	%	5.31	%
Other borrowings	22,555		27,631		0.10	%	0.09	%
Total	$	390,964	$	415,677

Schedule of Securities Sold under Agreement to Repurchase

Information concerning securities sold under agreement to repurchase and federal funds purchased is summarized as follows:

	December 31, 2023			December 31, 2022
Balance at year end	$	108,764		$	86,945
Average daily balance during the year	29,860			28,497
Average interest rate during the year	2.24		%	0.23		%
Maximum month-end balance during the year	$	116,220		$	86,945
Weighted average interest rate at year-end	5.05		%	3.78		%

Schedule of Federal Home Loan Bank, Advances

Information concerning FHLB advances as of or for the years ended December 31, 2023 and 2022 is summarized within the table below.

	December 31, 2023			December 31, 2022
Balance at year end	$	—		$	175,000
Average daily balance during the year	28,973			171,142
Average interest rate during the year	5.13		%	3.26		%
Maximum month-end balance during the year	$	125,000		$	540,000
Weighted average interest rate at year-end	—		%	4.44		%

Schedule of Bank Term Funding Program

Information concerning the Bank Term Funding Program as of or for the year ended December 31, 2023 is summarized within the table below.

	December 31, 2023
Balance at year end	$	130,000
Average daily balance during the year	1,781
Average interest rate during the year	4.85		%
Maximum month-end balance during the year	$	130,000
Weighted average interest rate at year-end	4.85		%

Schedule of Subordinated Borrowing

Further information related to the Company's subordinated debt as of December 31, 2023 is detailed below:

Name	Year Established	Maturity	Call Date	Total Debt Outstanding		Interest Rate	Coupon Structure
Subordinated Debt issued by Trust Preferred Securities:
FBK Trust I (1)	2003	06/09/2033	6/09/2008	$	9,280	8.84%	3-month SOFR plus 3.51%
FBK Trust II (1)	2003	06/26/2033	6/26/2008	21,650		8.77%	3-month SOFR plus 3.41%
Additional Subordinated Debt:
FBK Subordinated Debt I(2)	2020	09/01/2030	9/1/2025	100,000		4.50%	Semi-annual Fixed (3)
Unamortized debt issuance costs				(612)
Fair Value Hedge (See Note 15, “Derivatives”)				(673)
Total Subordinated Debt, net				$	129,645
(1)The Company classifies $30,000 of the trusts' subordinated debt as Tier 1 capital. (2)The Company classified the issuance, net of unamortized issuance costs and the associated fair value hedge as Tier 2 capital, which will be phased      out 20% per year in the final five years before maturity. (3)Beginning on September 1, 2025 the coupon structure migrates to the 3-month SOFR plus a spread of 439 basis points through the end of the term      of the debenture.