Stockholders' Equity and Stock-Based Compensation - Summary of Activity Related to Employee Stock Purchase Plan (Detail) - ESPP [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Issued	77	132	116
Weighted- Average Purchase Price	$ 372.50	$ 149.23	$ 123.69
Total Cash Proceeds	$ 28,667	$ 19,653	$ 14,383