Investment and Equity Securities - Carrying Amounts and Fair Values of Securities Available for Sale and Held to Maturity (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	$ 341,993	$ 331,832
Available-for-sale Securities, Gross Unrealized Gains	446	2,293
Available-for-sale Securities, Gross Unrealized Losses	20,171	3,788
Available-for-sale Securities, Fair Value	322,268	330,337
Held-to-maturity Securities, Amortized Cost	30,722	30,801
Held-to-maturity Securities, Gross Unrealized Gains	44	1,293
Held-to-maturity Securities, Gross Unrealized Losses	857	49
Held-to-maturity Securities, Fair Value	29,909	32,045
U.S. Treasury [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	31,410	26,675
Available-for-sale Securities, Gross Unrealized Gains		16
Available-for-sale Securities, Gross Unrealized Losses	2,021	310
Available-for-sale Securities, Fair Value	29,389	26,381
U.S. Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	42,290	40,066
Available-for-sale Securities, Gross Unrealized Gains	70	172
Available-for-sale Securities, Gross Unrealized Losses	685	426
Available-for-sale Securities, Fair Value	41,675	39,812
Held-to-maturity Securities, Amortized Cost	152	175
Held-to-maturity Securities, Gross Unrealized Gains		1
Held-to-maturity Securities, Gross Unrealized Losses	3
Held-to-maturity Securities, Fair Value	149	176
GSE - Mortgage-backed Securities and CMO’s [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	124,749	121,994
Available-for-sale Securities, Gross Unrealized Gains	5	190
Available-for-sale Securities, Gross Unrealized Losses	7,678	1,736
Available-for-sale Securities, Fair Value	117,076	120,448
Asset-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	42,161	43,383
Available-for-sale Securities, Gross Unrealized Gains	318	875
Available-for-sale Securities, Gross Unrealized Losses	218	60
Available-for-sale Securities, Fair Value	42,261	44,198
State and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	93,383	89,786
Available-for-sale Securities, Gross Unrealized Gains	51	892
Available-for-sale Securities, Gross Unrealized Losses	9,360	1,201
Available-for-sale Securities, Fair Value	84,074	89,477
Held-to-maturity Securities, Amortized Cost	15,570	15,626
Held-to-maturity Securities, Gross Unrealized Gains	14	1,096
Held-to-maturity Securities, Gross Unrealized Losses	363
Held-to-maturity Securities, Fair Value	15,221	16,722
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	8,000	9,928
Available-for-sale Securities, Gross Unrealized Gains	2	148
Available-for-sale Securities, Gross Unrealized Losses	209	55
Available-for-sale Securities, Fair Value	7,793	10,021
Held-to-maturity Securities, Amortized Cost	15,000	15,000
Held-to-maturity Securities, Gross Unrealized Gains	30	196
Held-to-maturity Securities, Gross Unrealized Losses	491	49
Held-to-maturity Securities, Fair Value	$ 14,539	$ 15,147

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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