Assets Held For Sale and Sales of Real Estate (Details) - USD ($) $ in Thousands		Jun. 30, 2018	Dec. 31, 2017
Assets held for sale	[1]	$ 28,955	$ 38,900
FCC Licenses
Assets held for sale		0	38,900
Real Estate
Assets held for sale		$ 28,955	$ 0

[1] (3)See Note 3 for information regarding assets held for sale.