Regulatory Capital Requirements - Actual and Statutory Required Capital Amounts and Ratios (Detail) - Home Savings [Member] - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total capital (to risk-weighted assets), Actual Amount	$ 305,033	$ 301,864
Tier 1 capital (to risk-weighted assets), Actual Amount	285,091	281,475
Common equity Tier 1 capital (to risk-weighted assets), Actual Amount	285,091	281,475
Tier 1 capital (to average assets), Actual Amount	$ 285,091	$ 281,475
Total capital (to risk-weighted assets), Actual Ratio	13.73%	14.30%
Tier 1 capital (to risk-weighted assets), Actual Ratio	12.83%	13.34%
Common equity Tier 1 capital (to risk-weighted assets), Actual Ratio	12.83%	13.34%
Tier 1 capital (to average assets), Actual Ratio	10.04%	10.11%
Total capital (to risk-weighted assets), Minimum Capital Requirements Per Regulation Amount	$ 177,747	$ 168,841
Tier 1 capital (to risk-weighted assets), Minimum Capital Requirements Per Regulation Amount	133,310	126,631
Common equity Tier 1 capital (to risk-weighted assets), Minimum Capital Requirements Per Regulation Amount	99,983	94,973
Tier 1 capital (to average assets), Minimum Capital Requirements Per Regulation Amount	$ 113,531	$ 111,318
Total capital (to risk-weighted assets), Minimum Capital Requirements Per Regulation Ratio	8.00%	8.00%
Tier 1 capital (to risk-weighted assets), Minimum Capital Requirements Per Regulation Ratio	6.00%	6.00%
Common equity Tier 1 capital (to risk-weighted assets), Minimum Capital Requirements Per Regulation Ratio	4.50%	4.50%
Tier 1 capital (to average assets), Minimum Capital Requirements Per Regulation Ratio	4.00%	4.00%
Total capital (to risk-weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 222,183	$ 211,051
Tier 1 capital (to risk-weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	177,747	168,841
Common equity Tier 1 capital (to risk-weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	144,419	137,183
Tier 1 capital (to average assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 141,913	$ 139,147
Total capital (to risk-weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	10.00%	10.00%
Tier 1 capital (to risk-weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	8.00%	8.00%
Common equity Tier 1 capital (to risk-weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	6.50%	6.50%
Tier 1 capital (to average assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	5.00%	5.00%

Common equity tier one capital required for capital adequacy to risk weighted assets.

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Common equity tier one capital required to be well capitalized to risk weighted assets.

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Common equity tier one capital to risk weighted assets.

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The amount of total capital as defined in the regulations.

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The minimum amount of Total Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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The amount of Total Capital required to be categorized as well as capitalized under the regulatory framework for prompt corrective action.

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The Total risk based capital ratio (total capital divided by risk weighted assets) required to be categorized as "well capitalized", in the regulatory framework for prompt corrective action.

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Total Capital divided by risk weighted assets as defined in the regulations.

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Amount of Common Equity Tier One Risk-based Capital, as defined by regulatory framework.

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Amount of Common Equity Tier 1 Risk-based Capital required to be categorized as adequately capitalized under regulatory framework for prompt corrective action.

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Amount of Common Equity Tier 1 Risk-based Capital required to be categorized as well-capitalized under regulatory framework for prompt corrective action.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Tier 1 Leverage Capital as defined in the regulations. Also called Core Capital.

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The minimum amount of Tier 1 Leverage Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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The minimum amount of Tier 1 Leverage Capital for capital adequacy purposes divided by average assets as defined in the regulations.

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The amount of Tier 1 Leverage Capital required to be categorized as well capitalized under the regulatory framework for prompt corrective action.

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The amount of Tier 1 Leverage Capital required to be categorized as well capitalized divided by average assets as defined in the regulatory framework for prompt corrective action.

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Tier 1 Leverage Capital divided by average assets as defined in the regulations.

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Tier 1 Risk Based Capital as defined in the regulations.

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The minimum amount of Tier 1 Risk Based Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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The minimum Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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The amount of Tier 1 Risk Based Capital required to be categorized as well capitalized under the regulatory framework for prompt corrective action.

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The Tier 1 capital ratio (Tier 1 capital divided by risk weighted assets) required to be categorized as "well capitalized" under the regulatory framework for prompt corrective action.

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Tier 1 capital divided by risk weighted assets as defined by regulations.

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