Discontinued Operations (Details) - USD ($) $ in Thousands		3 Months Ended									12 Months Ended
		Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	[1]	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Income from discontinued operations, net of tax		$ 0	$ 0	$ 0	$ 0	$ (30)	$ 30,451	$ 1,159	$ 891		$ 0	$ 32,471		$ 5,276
Joplin, Missouri and Victoria, Texas Television Stations [Member]
Net operating revenue											0	14,238	[2]	23,636
Station operating expense	[3]										0	9,757	[2]	14,743
Other operating (income) expense											0	31	[2]	(42)
Operating income											0	4,450	[2]	8,935
Interest expense	[4]										0	21	[2]	32
Income before income taxes											0	4,429	[2]	8,903
Pretax gain on the disposal of discontinued operations											0	50,842	[2]	0
Total pretax gain on discontinued operations											0	55,271	[2]	8,903
Income tax expense	[5]										0	22,800	[2]	3,627
Income from discontinued operations, net of tax											$ 0	$ 32,471	[2]	$ 5,276

[1] March 31, 2017 quarterly data have been reclassified to conform with current presentation.

[2] Results of operations for the Television stations are reflected through August 31, 2017. The effective date of the sale was September 1, 2017.

[3] No depreciation expense was recorded by the Company beginning May 9, 2017, the date the Television segment assets’ were held for sale.

[4] Interest expense related to the Surtsey debt that is guaranteed by the Television stations. Our affiliate repaid this loan when the television stations were sold on September 1, 2017.

[5] The effective tax rates on pretax income from discontinued operations were approximately 41%.