Marketable Securities and Certificates of Deposit (Tables)

9 Months Ended

Sep. 30, 2018

Investments, Debt and Equity Securities [Abstract]

The amortized cost and estimated fair value of the Company's Marketable Securities as of September 30, 2018 and December 31, 2017 were as follows:



	September 30, 2018								December 31, 2017
	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value		Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Securities Investments - Debt Securities	$	1,298	$	—	$	5	$	1,293	$	1,806	$	—	$	11	$	1,795
Securities Investments - Equity Securities	666		—		310		356		5,388		—		4,144		1,244
Debt Securities Carried by EGL	145,731		159		63		145,827		34,233		87		26		34,294
Investment Funds	55,940		7,716		4		63,652		22,027		5,678		6		27,699
Total	$	203,635	$	7,875	$	382	$	211,128	$	63,454	$	5,765	$	4,187	$	65,032

Investments Classified by Contractual Maturity Date

Scheduled maturities of the Company's available-for-sale debt securities within the Securities Investments portfolio as of September 30, 2018 and December 31, 2017 were as follows:



	September 30, 2018				December 31, 2017
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due within one year	$	200	$	200	$	204	$	204
Due after one year through five years	999		995		1,602		1,591
Due after five years through 10 years	99		98		—		—
Total	$	1,298	$	1,293	$	1,806	$	1,795