Deferred Income (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Revenue Recognition and Deferred Revenue [Abstract]
Deferred revenue	$ 9,315	$ 9,468

Amount of gain on the sale of property that does not qualify for gain recognition as of the balance sheet date.

No definition available.

Name:	us-gaap_DeferredGainOnSaleOfProperty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant