Investment Securities and Certificates of Deposit (Tables)

3 Months Ended

Mar. 31, 2021

Investments, Debt and Equity Securities [Abstract]

Unrealized Gain (Loss) on Investments

The Company's Investment Securities and Certificates of Deposit as of March 31, 2021 and December 31, 2020 were as follows:

	March 31, 2021								December 31, 2020
	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value		Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Debt Securities	$	147,995	$	1	$	—	$	147,996	$	402,824	$	39	$	—	$	402,863
Equity Securities	2,621		2,055		—		4,676		666		—		73		593
Debt Securities Carried by Broker-Dealers	519,969		19		1		519,987		550,002		27		3		550,026
Investment Funds	109,268		17,313		—		126,581		87,612		19,742		—		107,354
Total Investment Securities (carried at fair value)	$	779,853	$	19,388	$	1	$	799,240	$	1,041,104	$	19,808	$	76	$	1,060,836
Certificates of Deposit (carried at contract value)							73,877								—
Total Investment Securities and Certificates of Deposit							$	873,117							$	1,060,836

Investments Classified by Contractual Maturity Date

Scheduled maturities of the Company's available-for-sale debt securities as of March 31, 2021 and December 31, 2020 were as follows:

	March 31, 2021				December 31, 2020
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due within one year	$	147,995	$	147,996	$	402,824	$	402,863
Total	$	147,995	$	147,996	$	402,824	$	402,863