Investments (Tables)

3 Months Ended

Mar. 31, 2017

Investments [Abstract]

Investments in Marketable Equity Securities

Investments in marketable equity securities comprised the following:

	As of
	March 31, 2017		December 31, 2016
(in thousands)
Total cost	$	269,343	$	269,343
Gross unrealized gains	164,444		154,886
Total Fair Value	$	433,787	$	424,229