Marketable Securities and Certificates of Deposit (Tables)

6 Months Ended

Jun. 30, 2019

Investments, Debt and Equity Securities [Abstract]

Unrealized Gain (Loss) on Investments

The amortized cost and estimated fair value of the Company's Marketable Securities as of June 30, 2019 and December 31, 2018 were as follows:

	June 30, 2019								December 31, 2018
	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value		Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Securities Investments - Debt Securities	$	1,933	$	35	$	—	$	1,968	$	1,622	$	10	$	—	$	1,632
Securities Investments - Equity Securities	666		—		218		448		666		—		410		256
Debt Securities Carried by EGL	148,179		1,538		—		149,717		147,009		954		—		147,963
Investment Funds	61,784		3,132		—		64,916		56,296		402		1,922		54,776
Total	$	212,562	$	4,705	$	218	$	217,049	$	205,593	$	1,366	$	2,332	$	204,627

Investments Classified by Contractual Maturity Date

Scheduled maturities of the Company's available-for-sale debt securities within the Securities Investments portfolio as of June 30, 2019 and December 31, 2018 were as follows:

	June 30, 2019				December 31, 2018
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due within one year	$	618	$	620	$	391	$	391
Due after one year through five years	1,315		1,348		1,231		1,241
Total	$	1,933	$	1,968	$	1,622	$	1,632