Stock-Based Compensation - Time-Based Restricted Stock and Restricted Stock Unit Activity (Detail) - Time-Based Restricted Stock and Time-Based Restricted Stock Units [Member] - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule Of Restricted Stock Activity [Line Items]
Nonvested, Shares, Beginning Balance	160,722	218,466	311,096
Time-based Restricted Stock, Granted	33,703	54,406	71,300
Time-based Restricted Stock, Vested	(78,081)	(111,036)	(162,650)
Time-based Restricted Stock, Forfeited	(4,798)	(1,114)	(1,280)
Nonvested, Shares, Ending Balance	111,546	160,722	218,466
Nonvested, Weighted-Average Grant Price Per Share, Beginning Balance	$ 35.68	$ 28.75	$ 21.34
Weighted-Average Grant Price Per Share, Granted	100.50	53.97	38.12
Weighted-Average Grant Price Per Share, Vested	37.81	30.94	18.67
Weighted-Average Grant Price Per Share, Forfeited	66.00	40.34	31.17
Nonvested, Weighted-Average Grant Price Per Share, Ending Balance	$ 52.91	$ 35.68	$ 28.75