Investments (Tables)

12 Months Ended

Dec. 31, 2022

Investments Debt And Equity Securities [Abstract]

Schedule of Investments

Investments consist of the following:

			Gross Unrealized
					Losses
	Amortized				Less than			Greater than			Estimated
December 31, 2022	Cost		Gains		One Year			One Year			Fair Value
Short-term investments:
Available-for-sale securities:
Corporate debt securities	$	145,421	$	—	$	(432	)	$	(2,054	)	$	142,935
U.S. government and agency debt securities		143,710		16		(266	)		(1,289	)		142,171
Non-U.S. government debt securities		31,452		—		(20	)		(546	)		30,886
Total short-term investments		320,583		16		(718	)		(3,889	)		315,992
Long-term investments:
Available-for-sale securities:
Corporate debt securities		68,229		—		(1,550	)		(676	)		66,003
U.S. government and agency debt securities		62,220		—		(917	)		(1,424	)		59,879
Non-U.S. government debt securities		4,099		—		—			(191	)		3,908
		134,548		—		(2,467	)		(2,291	)		129,790
Held-to-maturity securities:
Certificates of deposit		1,820		—		—			—			1,820
Total long-term investments		136,368		—		(2,467	)		(2,291	)		131,610
Total investments	$	456,951	$	16	$	(3,185	)	$	(6,180	)	$	447,602
December 31, 2021
Short-term investments:
Available-for-sale securities:
Corporate debt securities	$	85,201	$	177	$	(39	)	$	—		$	85,339
U.S. government and agency debt securities		45,349		35		(24	)		—			45,360
Non-U.S. government debt securities		68,046		75		(53	)		—			68,068
Total short-term investments		198,596		287		(116	)		—			198,767
Long-term investments:
Available-for-sale securities:
Corporate debt securities		111,793		—		(654	)		—			111,139
U.S. government and agency debt securities		81,296		—		(517	)		—			80,779
Non-U.S. government debt securities		35,902		—		(210	)		—			35,692
		228,991		—		(1,381	)		—			227,610
Held-to-maturity securities:
Certificates of deposit		1,820		—		—			—			1,820
Total long-term investments		230,811		—		(1,381	)		—			229,430
Total investments	$	429,407	$	287	$	(1,497	)	$	—		$	428,197

Schedule of Proceeds from Sales and Maturities of Marketable Securities Plus Resulting Realized Gains and Losses

Realized gains and losses on the sales and maturities of investments, which were identified using the specific identification method, were as follows:

	Year Ended December 31,
(In thousands)	2022		2021		2020
Proceeds from the sales and maturities of investments	$	281,627	$	295,010	$	253,001
Realized gains	$	—	$	34	$	76
Realized losses	$	529	$	977	$	977

Schedule of Contractual Maturities of Available-for-Sale and Held-to-Maturity Securities

The Company’s available‑for‑sale and held‑to‑maturity securities at December 31, 2022 had contractual maturities in the following periods:

	Available-for-sale				Held-to-maturity
	Amortized		Estimated		Amortized		Estimated
(In thousands)	Cost		Fair Value		Cost		Fair Value
Within 1 year	$	318,592	$	313,994	$	1,820	$	1,820
After 1 year through 5 years		136,539		131,788		—		—
Total	$	455,131	$	445,782	$	1,820	$	1,820