Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive (Loss)	Total
Balance at Dec. 31, 2022	$ 33	$ 550,299	$ 118,892	$ (1,968)	$ 667,256
Balance (in shares) at Dec. 31, 2022	32,775
Increase (Decrease) in Stockholders' Equity
Net income			246,263		246,263
Foreign currency translation adjustments				38	38
Change in pension obligation, net of tax				84	84
Exercise of stock options (in shares)	3
Exercise of stock options		25			25
Issuance of stock under Employee Stock Purchase Plan		2,057			2,057
Issuance of stock under Employee Stock Purchase Plan (in shares)	16
Issuance of restricted shares of common stock		(16,611)			(16,611)
Issuance of restricted shares of common stock (in shares)	271
Stock-based compensation expense		18,269			18,269
Repurchase of common stock		(6,850)	(45,649)		(52,499)
Repurchase of common stock (in shares)	(380)
Balance at Dec. 31, 2023	$ 33	547,189	319,506	(1,846)	864,882
Balance (in shares) at Dec. 31, 2023	32,685
Increase (Decrease) in Stockholders' Equity
Net income			200,992		200,992
Foreign currency translation adjustments				(4,297)	(4,297)
Change in pension obligation, net of tax				(71)	(71)
Issuance of stock under Employee Stock Purchase Plan		2,385			2,385
Issuance of stock under Employee Stock Purchase Plan (in shares)	30
Issuance of restricted shares of common stock		(11,563)			(11,563)
Issuance of restricted shares of common stock (in shares)	194
Stock-based compensation expense		20,951			20,951
Repurchase of common stock	$ (1)	(10,308)	(50,180)		(60,489)
Repurchase of common stock (in shares)	(544)
Balance at Dec. 31, 2024	$ 32	548,654	470,318	(6,214)	1,012,790
Balance (in shares) at Dec. 31, 2024	32,365
Increase (Decrease) in Stockholders' Equity
Net income			120,238		120,238
Foreign currency translation adjustments				3,596	3,596
Change in pension obligation, net of tax				(20)	(20)
Unrealized gains on available-for-sale investments				436	436
Issuance of stock under Employee Stock Purchase Plan		2,459			2,459
Issuance of stock under Employee Stock Purchase Plan (in shares)	38
Issuance of restricted shares of common stock		(4,514)			(4,514)
Issuance of restricted shares of common stock (in shares)	141
Stock-based compensation expense		20,773			20,773
Repurchase of common stock	$ (1)	(34,063)	(87,017)		(121,081)
Repurchase of common stock (in shares)	(1,827)
Balance at Dec. 31, 2025	$ 31	$ 533,309	$ 503,539	$ (2,202)	$ 1,034,677
Balance (in shares) at Dec. 31, 2025	30,717