Restricted Shares Issued in Conjunction with Stock Plan (Detail) - USD ($) $ in Millions		1 Months Ended	12 Months Ended
	Jan. 24, 2023	Jan. 30, 2024	Dec. 31, 2023
Restricted Stock
Class of Stock [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Aggregate Intrinsic Value		$ 1.1
Restricted Stock | Period 1
Class of Stock [Line Items]
Issuance Date			Jan. 26, 2021
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period			23,140
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Aggregate Intrinsic Value			$ 0.9
Restricted Stock | Period 2
Class of Stock [Line Items]
Issuance Date			Jan. 25, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period			36,770
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Aggregate Intrinsic Value			$ 1.7
Restricted Stock | Period 3
Class of Stock [Line Items]
Issuance Date			Jan. 24, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period			18,770
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Aggregate Intrinsic Value			$ 1.0
Performance Shares [Member]
Class of Stock [Line Items]
Issuance Date	Jan. 24, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period	18,770
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Aggregate Intrinsic Value	$ 1.0