Summary of Significant Accounting Policies - Net Income per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Summary of Significant Accounting Policies
Anti-dilutive common equivalent shares excluded from calculation	6,025	4,929	2,554
Net income per share:
Net income available to common stockholders	$ 246,263	$ 183,079	$ 98,650
Weighted average shares of common stock outstanding used in computing basic income per share	32,758	33,043	33,555
Incremental options and RSUs	407	499	713
Weighted average shares of common stock used in computing diluted net income per share	33,165	33,542	34,268
Net income per share
Basic	$ 7.52	$ 5.54	$ 2.94
Diluted	$ 7.43	$ 5.46	$ 2.88