Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended						9 Months Ended
		Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net Income (Loss)		$ 127,013	$ 194,258	$ 53,545	$ 125,701	$ 192,439	$ 78,885	$ 374,816	$ 397,025
Participating Securities, Distributed and Undistributed Earnings (Loss), Basic		(626)			(654)			(1,847)	(2,071)
Net income attributable to common stockholders		$ 126,387			$ 125,047			$ 372,969	$ 394,954
Weighted average shares outstanding:
Basic		37,090			37,983			37,272	38,104
Effect of dilutive securities:
Stock options and employee stock purchase plan		133			204			148	226
Diluted		37,223			38,187			37,420	38,330
Earnings per share attributable to common stockholders:
Basic		$ 3.41			$ 3.29			$ 10.01	$ 10.37
Diluted		$ 3.4			$ 3.27			$ 9.97	$ 10.3
Anti-dilutive stock options excluded from diluted earnings per share computations	[1]	188			88			190	57

[1] Since these options have exercise prices that are higher than the average market prices of our common stock, including them in the calculation would have an anti-dilutive effect on earnings per share.