Regulatory Capital (Tables)

9 Months Ended

Sep. 30, 2025

Banking and Thrift, Interest [Abstract]

Schedule of Regulatory Capital Requirement

The following table presents Horizon and the Bank’s actual and required capital ratios as of September 30, 2025 and December 31, 2024, as well as the revisions to Horizon's regulatory capital ratios to reflect the correction of the capital computations for the foregoing periods:

	Actual				Required for Capital Adequacy Purposes(1)				Required For Capital Adequacy Purposes with Capital Buffer(1)				Well Capitalized  Under Prompt Corrective Action Provisions(1)
	Amount		Ratio		Amount		Ratio		Amount		Ratio		Amount	Ratio
September 30, 2025
Total capital (to risk-weighted assets) (1)
Consolidated	$	785,080	15.00	%	$	418,661	8.00	%	$	549,492	10.50	%	N/A	N/A
Bank	664,754		12.75		417,237		8.00		547,624		10.50		$521,546	10.00%
Tier 1 capital (1) (to risk-weighted assets)
Consolidated	589,789		11.27		313,995		6.00		444,827		8.50		N/A	N/A
Bank	612,305		11.74		312,928		6.00		443,314		8.50		417,237	8.00
Common equity tier 1 capital (1) (to risk-weighted assets)
Consolidated	532,153		10.17		235,497		4.50		366,328		7.00		N/A	N/A
Bank	612,305		11.74		234,696		4.50		365,082		7.00		339,005	6.50
Tier 1 capital (to average assets) (1)
Consolidated	589,789		8.22		286,859		4.00		286,859		4.00		N/A	N/A
Bank	612,305		8.55		286,332		4.00		286,332		4.00		357,915	5.00
(1) As defined by regulatory agencies
	Actual				Required for Capital Adequacy Purposes(1)				Required For Capital Adequacy Purposes with Capital Buffer(1)				Well Capitalized  Under Prompt Corrective Action Provisions(1)
	Amount		Ratio		Amount		Ratio		Amount		Ratio		Amount	Ratio
December 31, 2024
Total capital (to risk-weighted assets) (1)
Consolidated	$	800,209	13.91	%	$	460,266	8.00	%	$	604,099	10.50	%	N/A	N/A
Bank	725,383		12.64	%	459,039		8.00	%	602,489		10.50	%	573,799	10.00%
Tier 1 capital (1) (to risk-weighted assets)
Consolidated	690,183		12.00	%	345,199		6.00	%	489,033		8.50	%	N/A	N/A
Bank	671,095		11.70	%	344,279		6.00	%	487,729		8.50	%	459,039	8.00%
Common equity tier 1 capital (1) (to risk-weighted assets)
Consolidated	632,760		11.11	%	258,900		4.50	%	402,733		7.00	%	N/A	N/A
Bank	671,095		11.70	%	258,209		4.50	%	401,659		7.00	%	372,969	6.50%
Tier 1 capital (to average assets) (1)
Consolidated	690,183		8.88	%	310,825		4.00	%	310,825		4.00	%	N/A	N/A
Bank	671,095		8.64	%	310,539		4.00	%	310,539		4.00	%	388,174	5.00%
(1) As defined by regulatory agencies