Marketable Securities - (Details) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Investments
Amortized Cost	$ 159,669		$ 207,917
Gross Unrealized Gain	1		3
Gross Unrealized Loss	(2,341)		(666)
Estimated Fair Value	157,329		207,254
Unrealized losses in a continuous loss position for more than twelve consecutive months	33,200
Gross realized gains	9	$ 56
Fair market value of investments in unrealized loss position	151,300
Cost Maturities:
Within 1 year	136,495
Between 1 to 2 years	23,174
Total investments available for sale	159,669
Fair Value Maturities:
Within 1 year	134,648
Between 1 to 2 years	22,681
Total investments available for sale	157,329
Corporate bonds
Investments
Amortized Cost	159,669		207,917
Gross Unrealized Gain	1		3
Gross Unrealized Loss	(2,341)		(666)
Estimated Fair Value	$ 157,329		$ 207,254

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year to year two. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

No definition available.