Marketable Securities and Certificates of Deposit (Tables)

3 Months Ended

Mar. 31, 2018

Investments, Debt and Equity Securities [Abstract]

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



	March 31, 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	$	4,683	$	—	$	13	$	4,670	$	1,806	$	—	$	11	$	1,795
Securities Investments - Equity Securities	5,388		—		4,149		1,239		5,388		—		4,144		1,244
Debt Securities Carried by EGL	37,390		156		24		37,522		34,233		87		26		34,294
Investment Funds	48,993		3,933		7		52,919		22,027		5,678		6		27,699
Total	$	96,454	$	4,089	$	4,193	$	96,350	$	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 March 31, 2018 and December 31, 2017 were as follows:



	March 31, 2018				December 31, 2017
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due within one year	$	3,296	$	3,295	$	204	$	204
Due after one year through five years	1,387		1,375		1,602		1,591
Total	$	4,683	$	4,670	$	1,806	$	1,795