Investments (Tables)

12 Months Ended

Dec. 31, 2019

Investments [Abstract]

Investments in Marketable Equity Securities

Investments in marketable equity securities consist of the following:

	As of December 31
(in thousands)	2019		2018
Total cost	$	282,349	$	282,563
Gross unrealized gains	302,731		216,111
Gross unrealized losses	—		(2,284		)
Total Fair Value	$	585,080	$	496,390

Gain (loss) on marketable equity securities

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

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