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Investment Securities and Certificates of Deposit (Tables)
 12 Months Ended
Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]  
Unrealized Gain (Loss) on Investments The Company's Investment Securities and Certificates of Deposit as of December 31, 2022 and 2021 were as follows:
 December 31, 2022December 31, 2021
 CostGross
Unrealized
Gains		Gross
Unrealized
Losses		Fair ValueCostGross
Unrealized
Gains		Gross
Unrealized
Losses		Fair Value
Debt Securities$802,652 $4,483 $— $807,135 $706,826 $37 $16 $706,847 
Equity Securities558 — 223 335 666 193 — 859 
Debt Securities Carried by EGL363,824 1,814 — 365,638 784,813 43 14 784,842 
Investment Funds144,343 531 8,156 136,718 111,682 39,191 — 150,873 
Total Investment Securities (carried at fair value)$1,311,377 $6,828 $8,379 $1,309,826 $1,603,987 $39,464 $30 $1,643,421 
Certificates of Deposit (carried at contract value)122,890 141,218 
Total Investment Securities and Certificates of Deposit$1,432,716 $1,784,639 
Investments Classified by Contractual Maturity Date
Scheduled maturities of the Company's available-for-sale debt securities as of December 31, 2022 and 2021 were as follows:
 December 31, 2022December 31, 2021
 Amortized
Cost		Fair ValueAmortized
Cost		Fair Value
Due within one year$800,710 $805,190 $706,826 $706,847 
Due after one year through five years1,942 1,945 — — 
Total$802,652 $807,135 $706,826 $706,847