Amount of gain (loss) related to nonoperating activities, classified as other.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.7,9)
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

Name:	us-gaap_OtherNonoperatingGainsLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Quarterly Financial Information (Unaudited) - Gain on Revaluation of Investment Interest (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Nonoperating Gains (Losses) [Abstract]
Other gains and (losses), net		$ 693	$ 1,633	$ (337)
Gaylord Rockies [Member]
Nonoperating Gains (Losses) [Abstract]
Other gains and (losses), net	$ 131,400