Stock Based Compensation - Schedule of Changes in Stock Units (Detail) - $ / shares	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Balance at beginning of period	24,813	46,598
Grants		615
Vesting	(2,872)	(3,161)
Forfeited/expired	(1,105)	(200)
Balance at end of period	20,836	43,852
Balance at beginning of period	$ 36.21	$ 35.75
Weighted Average Grant Date Fair Value, Grants		49.60
Weighted Average Grant Date Fair Value, Vesting	28.25	32.06
Weighted Average Grant Date Fair Value, Forfeited/expired	29.70	29.70
Balance at end of period	$ 37.53	$ 36.24
Restricted Stock Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Balance at beginning of period	39,657	22,597
Grants	0	0
Vesting	0	0
Forfeited/expired	(2,888)	0
Balance at end of period	36,769	22,597
Balance at beginning of period	$ 47.83	$ 48.91
Weighted Average Grant Date Fair Value, Grants	0	0
Weighted Average Grant Date Fair Value, Vesting	0	0
Weighted Average Grant Date Fair Value, Forfeited/expired	47.87	0
Balance at end of period	$ 47.83	$ 48.91
Performance Shares [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Balance at beginning of period	47,082	22,597
Forfeited/expired	(3,456)
Balance at end of period	43,626	22,597
Balance at beginning of period	$ 48.00	$ 48.91
Weighted Average Grant Date Fair Value, Forfeited/expired	48.04
Balance at end of period	$ 48.00	$ 48.91