Investments (Tables)

6 Months Ended

Jun. 30, 2019

Investments [Abstract]

Investments in Marketable Equity Securities

Investments in marketable equity securities consist of the following:

	As of
	June 30, 2019			December 31, 2018
(in thousands)
Total cost	$	282,349		$	282,563
Gross unrealized gains	235,885			216,111
Gross unrealized losses	(135		)	(2,284		)
Total Fair Value	$	518,099		$	496,390

Gain (loss) on Marketable Equity Securities

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

	Three Months Ended   June 30					Six Months Ended   June 30
(in thousands)	2019		2018			2019			2018
Gain (loss) on marketable equity securities, net	$	7,791	$	(2,554	)	$	31,857		$	(16,656	)
Less: Net (gains) losses in earnings from marketable equity securities sold and donated	2		1,660			(2,980		)	4,271
Net unrealized gains (losses) in earnings from marketable equity securities still held at the end of the period	$	7,793	$	(894	)	$	28,877		$	(12,385	)