Investments (Tables)

12 Months Ended

Dec. 31, 2020

Investments [Abstract]

Investments in Marketable Equity Securities

Investments in marketable equity securities consist of the following:

	As of December 31
(in thousands)	2020		2019
Total cost	$	232,847	$	282,349
Gross unrealized gains	340,255		302,731
Total Fair Value	$	573,102	$	585,080

Gain (loss) on marketable equity securities

The net gain (loss) on marketable equity securities comprised the following:

	Year ended December 31
(in thousands)	2020		2019		2018
Gain (loss) on marketable equity securities, net	$	60,787	$	98,668	$	(15,843)
Less: Net losses (gains) in earnings from marketable equity securities sold and donated	13,382		(2,810)		4,271
Net unrealized gains (losses) in earnings from marketable equity securities still held at the end of the year	$	74,169	$	95,858	$	(11,572)