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INVESTMENTS (Tables)
 3 Months Ended
Mar. 31, 2023
Investments, Debt and Equity Securities [Abstract]  
Schedule of Debt Securities, Available-for-sale The following is a summary of our investment securities as of March 31, 2023 and December 31, 2022 (in thousands):
March 31, 2023
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Carrying
Value
Cash equivalents$382,510 $5 $(9)$382,506 
Available for sale:
U.S. government and agency obligations7,256 1 (210)7,047 
Corporate obligations2,906 4 (69)2,841 
State and municipal obligations458 — (12)446 
Certificates of deposit3,304 — — 3,304 
Mortgage-backed securities37 — (1)36 
Asset-backed securities72 — — 72 
Total available-for-sale securities14,033 5 (292)13,746 
Held to maturity:
U.S. government and agency obligations233 — — 233 
Certificates of deposit1,949 — — 1,949 
Total held-to-maturity securities2,182 — — 2,182 
Total investments$398,725 $10 $(301)$398,434 
December 31, 2022
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Carrying
Value
Cash equivalents$340,795 $8 $— $340,803 
Available for sale:
U.S. government and agency obligations8,742 — (301)8,441 
Corporate obligations3,401 1 (95)3,307 
State and municipal obligations712 — (17)695 
Certificates of deposit3,318 — — 3,318 
Mortgage-backed securities156 — — 156 
Asset-backed securities60 — — 60 
Other1 — — 1 
Total available-for-sale securities16,390 1 (413)15,978 
Held to maturity:— 
U.S. government and agency obligations685 — — 685 
Certificates of deposit1,947 — — 1,947 
Total held-to-maturity securities2,632 — — 2,632 
Total investments$359,817 $9 $(413)$359,413 
The following is a summary of our investment securities (in thousands):
March 31, 2023
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Carrying
Value
Cash equivalents$928,290 $30 $(60)$928,260 
Available for sale:
U.S. government and agency obligations277,194 142 (1,535)275,801 
Corporate obligations124,158 942 (643)124,457 
State and municipal obligations7,614 1 (57)7,558 
Certificates of deposit1,837 — — 1,837 
Mortgage-backed securities9,153 6 (213)8,946 
Asset backed securities18,325 89 (46)18,368 
Other388 — (9)379 
Total available-for-sale securities438,669 1,180 (2,503)437,346 
Held to maturity:
U.S. government and agency obligations4,823 — (110)4,713 
Total held-to-maturity securities4,823 — (110)4,713 
Total investments$1,371,782 $1,210 $(2,673)$1,370,319 
December 31, 2022
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Carrying
Value
Cash equivalents$622,267 $24 $— $622,291 
Available for sale:
U.S. government and agency obligations365,040 1 (2,956)362,085 
Corporate obligations520,097 523 (623)519,997 
State and municipal obligations9,653 — (80)9,573 
Certificates of deposit8,760 — (2)8,758 
Mortgage-backed securities154,864 46 (157)154,753 
Asset backed securities59,557 — — 59,557 
Other387 — (14)373 
Total available-for-sale securities1,118,358 570 (3,832)1,115,096 
Held to maturity:
U.S. government and agency obligations5,974 — (159)5,815 
Total held-to-maturity securities5,974 — (159)5,815 
Total investments$1,746,599 $594 $(3,991)$1,743,202 
Schedule of Debt Securities, Held-to-maturity The following is a summary of our investment securities as of March 31, 2023 and December 31, 2022 (in thousands):
March 31, 2023
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Carrying
Value
Cash equivalents$382,510 $5 $(9)$382,506 
Available for sale:
U.S. government and agency obligations7,256 1 (210)7,047 
Corporate obligations2,906 4 (69)2,841 
State and municipal obligations458 — (12)446 
Certificates of deposit3,304 — — 3,304 
Mortgage-backed securities37 — (1)36 
Asset-backed securities72 — — 72 
Total available-for-sale securities14,033 5 (292)13,746 
Held to maturity:
U.S. government and agency obligations233 — — 233 
Certificates of deposit1,949 — — 1,949 
Total held-to-maturity securities2,182 — — 2,182 
Total investments$398,725 $10 $(301)$398,434 
December 31, 2022
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Carrying
Value
Cash equivalents$340,795 $8 $— $340,803 
Available for sale:
U.S. government and agency obligations8,742 — (301)8,441 
Corporate obligations3,401 1 (95)3,307 
State and municipal obligations712 — (17)695 
Certificates of deposit3,318 — — 3,318 
Mortgage-backed securities156 — — 156 
Asset-backed securities60 — — 60 
Other1 — — 1 
Total available-for-sale securities16,390 1 (413)15,978 
Held to maturity:— 
U.S. government and agency obligations685 — — 685 
Certificates of deposit1,947 — — 1,947 
Total held-to-maturity securities2,632 — — 2,632 
Total investments$359,817 $9 $(413)$359,413 
The following is a summary of our investment securities (in thousands):
March 31, 2023
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Carrying
Value
Cash equivalents$928,290 $30 $(60)$928,260 
Available for sale:
U.S. government and agency obligations277,194 142 (1,535)275,801 
Corporate obligations124,158 942 (643)124,457 
State and municipal obligations7,614 1 (57)7,558 
Certificates of deposit1,837 — — 1,837 
Mortgage-backed securities9,153 6 (213)8,946 
Asset backed securities18,325 89 (46)18,368 
Other388 — (9)379 
Total available-for-sale securities438,669 1,180 (2,503)437,346 
Held to maturity:
U.S. government and agency obligations4,823 — (110)4,713 
Total held-to-maturity securities4,823 — (110)4,713 
Total investments$1,371,782 $1,210 $(2,673)$1,370,319 
December 31, 2022
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Carrying
Value
Cash equivalents$622,267 $24 $— $622,291 
Available for sale:
U.S. government and agency obligations365,040 1 (2,956)362,085 
Corporate obligations520,097 523 (623)519,997 
State and municipal obligations9,653 — (80)9,573 
Certificates of deposit8,760 — (2)8,758 
Mortgage-backed securities154,864 46 (157)154,753 
Asset backed securities59,557 — — 59,557 
Other387 — (14)373 
Total available-for-sale securities1,118,358 570 (3,832)1,115,096 
Held to maturity:
U.S. government and agency obligations5,974 — (159)5,815 
Total held-to-maturity securities5,974 — (159)5,815 
Total investments$1,746,599 $594 $(3,991)$1,743,202 
Schedule of Available-for-sale Investment With Gross Unrealized Losses
The fair value of available-for-sale investments, including those that are cash equivalents, with gross unrealized losses by major security type and length of time that individual securities have been in a continuous unrealized loss position at March 31, 2023 and December 31, 2022 were as follows (in thousands):
March 31, 2023
Less Than 12 Months12 Months or GreaterTotal
Description of InvestmentsFair
Value		Unrealized
Losses		Fair
Value		Unrealized
Losses		Fair
Value		Unrealized
Losses
Cash equivalents$70,213 $(9)$— $— $70,213 $(9)
U.S. government and agency obligations693 (9)6,694 (201)7,387 (210)
Corporate obligations178 (3)2,397 (66)2,575 (69)
State and municipal obligations3 — 369 (12)372 (12)
Asset-backed securities30 (1)— — 30 (1)
Total bonds$71,117 $(22)$9,460 $(279)$80,577 $(301)
December 31, 2022
Less Than 12 Months12 Months or GreaterTotal
Description of InvestmentsFair
Value		Unrealized
Losses		Fair
Value		Unrealized
Losses		Fair
Value		Unrealized
Losses
U.S. government and agency obligations$1,316 $(31)$6,808 $(270)$8,124 (301)
Corporate obligations740 (9)2,061 (86)2,801 (95)
State and municipal obligations340 (2)344 (15)684 (17)
Mortgage-backed securities2 — — — 2 — 
Other— — 1 — 1 — 
Total bonds$2,398 $(42)$9,214 $(371)$11,612 $(413)
Schedule of Available-for-sale Securities by Contractual Maturity
As of March 31, 2023, the maturity of available-for-sale securities, by contractual maturity, reflected at amortized cost and fair value were as follows (in thousands):
Amortized
Cost		Fair
Value
Due in one year or less10,343 10,187 
Due after one year through five years3,611 3,479 
Due after five years through 10 years79 80 
Due after 10 years— — 
Total debt securities14,033 13,746