Investments (Tables)

9 Months Ended

Sep. 30, 2017

Investments [Abstract]

Investments in Marketable Equity Securities

Investments in marketable equity securities comprised the following:

	As of
	September 30, 2017		December 31, 2016
(in thousands)
Total cost	$	269,343	$	269,343
Gross unrealized gains	226,256		154,886
Total Fair Value	$	495,599	$	424,229