Summary Of Significant Accounting Policies - Reconciliation of Basic and Diluted Shares Amounts (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Numerator:
Net income	$ 185,959	$ 128,291	$ 59,926
Effect of dilutive securities:
Charges associated with convertible debt instruments, net of tax	387	0	0
Numerator for diluted earnings per share - net income available to common stockholders after the effect of dilutive securities	$ 186,346	$ 128,291	$ 59,926
Denominator:
Weighted average shares used in computing net income per share - basic	55,460	55,015	52,554
Effect of dilutive shares:
Options and stock units	608	915	971
Convertible Senior Notes	1,360	1,253	367
Contingent consideration	11	0	0
Dilutive effect of unvested performance stock units	16	81	0
Dilutive potential common shares	1,995	2,249	1,338
Denominator for diluted earnings per share - adjusted weighted average shares used in computing net income per share - diluted	57,455	57,264	53,892
Earnings per share:
Basic	$ 3.35	$ 2.33	$ 1.14
Diluted	$ 3.24	$ 2.24	$ 1.11