Employee Benefit Plans - Balances of the Plan Assets, by Fair Value Hierarchy Level (Detail) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	$ 197,381	$ 183,035	$ 173,840
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	6,505	5,829
U.S. Government and Agencies [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	29,982	24,874
Mortgage Backed Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	7,705	6,588
Collateralized Mortgage Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value		623
Municipal Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	631	707
Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	9,300	8,394
General [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	36,667	33,537
Common Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	20,187	19,539
Equity Mutual Funds Domestic Equity Large Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	38,185	37,990
Equity Mutual Funds Domestic Equity Small Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	13,273	13,332
Equity Mutual Funds Alternative Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	17,500	16,145
Equity Mutual Funds International Emerging Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	4,304	3,993
Equity Mutual Funds International Equity Developed [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	13,142	11,484
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	143,258	183,035
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	0	5,829
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| U.S. Government and Agencies [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	0	24,874
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Mortgage Backed Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	0	6,588
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Collateralized Mortgage Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value		623
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Municipal Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	0	707
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	0	8,394
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| General [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	36,667	33,537
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Common Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	20,187	19,539
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Equity Mutual Funds Domestic Equity Large Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	38,185	37,990
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Equity Mutual Funds Domestic Equity Small Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	13,273	13,332
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Equity Mutual Funds Alternative Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	17,500	16,145
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Equity Mutual Funds International Emerging Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	4,304	3,993
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Equity Mutual Funds International Equity Developed [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	13,142	11,484
Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	54,123	0
Significant Other Observable Inputs (Level 2) [Member] \| Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	6,505	0
Significant Other Observable Inputs (Level 2) [Member] \| U.S. Government and Agencies [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	29,982	0
Significant Other Observable Inputs (Level 2) [Member] \| Mortgage Backed Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	7,705	0
Significant Other Observable Inputs (Level 2) [Member] \| Collateralized Mortgage Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value		0
Significant Other Observable Inputs (Level 2) [Member] \| Municipal Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	631	0
Significant Other Observable Inputs (Level 2) [Member] \| Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	9,300	0
Significant Other Observable Inputs (Level 2) [Member] \| General [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Common Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Equity Mutual Funds Domestic Equity Large Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Equity Mutual Funds Domestic Equity Small Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Equity Mutual Funds International Emerging Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	0	0
Significant Other Observable Inputs (Level 2) [Member] \| Equity Mutual Funds International Equity Developed [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	0	0
Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	0	0
Significant Unobservable Inputs (Level 3) [Member] \| U.S. Government and Agencies [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Mortgage Backed Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Collateralized Mortgage Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value		0
Significant Unobservable Inputs (Level 3) [Member] \| Municipal Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	0	0
Significant Unobservable Inputs (Level 3) [Member] \| General [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Common Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Equity Mutual Funds Domestic Equity Large Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Equity Mutual Funds Domestic Equity Small Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Equity Mutual Funds International Emerging Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	0	0
Significant Unobservable Inputs (Level 3) [Member] \| Equity Mutual Funds International Equity Developed [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset at fair value	$ 0	$ 0