Debt (Tables)

6 Months Ended

Jun. 30, 2019

Debt Disclosure [Abstract]

Summary of Debt

Debt is summarized as follows:

	Outstanding
	Principal		Carrying Value
	June 30,		June 30,			December 31,
	2019		2019			2018
	amounts in thousands
Margin Loan Facility	$	900,000	900,000			900,000
Exchangeable senior debentures	477,250		560,769			462,336
Senior notes	775,000		797,840			803,287
Senior credit facility	713,895		713,895			715,124
Wells Fargo note payable	7,319		7,319			7,554
Deferred financing costs	—		(6,854		)	(2,267	)
Total debt	$	2,873,464	2,972,969			2,886,034
Debt classified as current (included in other current liabilities)			(901,856		)	(900,759	)
Total long-term debt			$	2,071,113		1,985,275