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Stock-Based Compensation (Detail) - (Table 4) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Sep. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum	40.60%	42.50%
Granted	384,000	421,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 30.72	$ 37.04
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	25.11	$ 23.72
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price	$ 46.28
Cancelled/Forfeited	(2,000)
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price	$ 36.01
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Expirations in Period	229,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value	$ 833	$ 2,613
Forfeited	(37,000)	(25,000)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum	48.10%	51.10%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum	4.00%	3.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum	3.70%	1.20%
Weighted average fair value	$ 10.95	$ 13.42
Outstanding at June 30, 2012	3 years 4 months 24 days	2 years 3 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value	$ 610				$ 2,595
Exercisable at June 30, 2012	3 years 1 month 6 days	2 years
Exercisable at June 30, 2012	893,000	2,488,000
Granted (in Dollars per share)	$ 33.23	$ 40.58
Vested (in Dollars per share)	$ 34.74	$ 32.54
Vested	(316,000)	(281,000)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 37.82	$ 35.61
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 28.22	$ 25.26	$ 28.45	$ 23.80
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	3 years 1 month 6 days
Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	1 year 4 months 24 days
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life in years	3 years	3 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life in years	5 years	5 years

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