Investments (Tables)

6 Months Ended

Jun. 30, 2018

Investments [Abstract]

Investments in Marketable Equity Securities

Investments in marketable equity securities comprised the following:

	As of
	June 30, 2018		December 31, 2017
(in thousands)
Total cost	$	239,904	$	269,343
Gross unrealized gains	213,013		266,972
Total Fair Value	$	452,917	$	536,315

Loss on Marketable Equity Securities

The loss on marketable equity securities comprised the following:

	Three Months Ended			Six Months Ended
(in thousands)	June 30, 2018			June 30, 2018
Loss on marketable equity securities, net	$	(2,554	)	$	(16,656	)
Less: Net losses in earnings from marketable equity securities sold	1,660			4,271
Net unrealized losses in earnings from marketable equity securities still held at the end of the period	$	(894	)	$	(12,385	)