Stock Based Compensation - Schedule of Changes in Stock Units (Detail) - $ / shares	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Balance at beginning of period	24,813	46,598
Grants	25,190	15,425
Vesting	(17,682)	(23,898)
Forfeited/expired	(1,105)	(200)
Balance at end of period	31,216	37,925
Balance at beginning of period	$ 36.21	$ 35.75
Weighted Average Grant Date Fair Value, Grants	27.79	40.89
Weighted Average Grant Date Fair Value, Vesting	38.54	40.4
Weighted Average Grant Date Fair Value, Forfeited/expired	29.7	29.7
Balance at end of period	$ 28.25	$ 34.94
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	33,294	24,833
Vesting	(14,553)	(7,425)
Forfeited/expired	(2,888)	(348)
Balance at end of period	55,510	39,657
Balance at beginning of period	$ 47.83	$ 48.91
Weighted Average Grant Date Fair Value, Grants	29.53	47.19
Weighted Average Grant Date Fair Value, Vesting	48	48.91
Weighted Average Grant Date Fair Value, Forfeited/expired	47.87	48.91
Balance at end of period	$ 36.81	$ 47.83
Performance Shares [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Balance at beginning of period	47,082	22,597
Grants	33,294	24,833
Vesting	0	0
Forfeited/expired	(3,456)	(348)
Balance at end of period	76,920	47,082
Balance at beginning of period	$ 48	$ 48.91
Weighted Average Grant Date Fair Value, Grants	29.53	47.19
Weighted Average Grant Date Fair Value, Vesting	0	0
Weighted Average Grant Date Fair Value, Forfeited/expired	48.04	48.91
Balance at end of period	$ 40.01	$ 48