RELATED PERSON TRANSACTIONS: (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Related person transactions
Less: Current portion	$ (3,166)	$ (2,625)
Notes payable and capital leases to affiliates, less current portion	17,850	16,309
Capital leases payable maturity
2016	167,237
2017	83,920
2018	247,951
2019	19,502
2020	620,144
2021 and thereafter	2,759,350
Total minimum payments	3,898,104
Affiliates
Related person transactions
Amount obligated to be paid	21,016	18,934
Less: Current portion	(3,166)	(2,625)
Notes payable and capital leases to affiliates, less current portion	17,850	16,309
Capital leases payable maturity
2016	5,070
2017	5,061
2018	2,868
2019	2,978
2020	3,093
2021 and thereafter	10,172
Total minimum payments	29,242
Interest and amortization expense	(8,226)
Amount obligated to be paid	$ 21,016	18,934
Affiliates | Capital leases for building, interest at 8.54%
Related person transactions
Interest rate (as a percent)	8.54%
Amount obligated to be paid	$ 3,508	4,972
Capital leases payable maturity
Amount obligated to be paid	$ 3,508	4,972
Affiliates | Capital leases for building, interest at 7.93%
Related person transactions
Interest rate (as a percent)	7.93%
Amount obligated to be paid	$ 679	932
Capital leases payable maturity
Amount obligated to be paid	$ 679	932
Affiliates | Capital leases for building, interest at 8.11%
Related person transactions
Interest rate (as a percent)	8.11%
Amount obligated to be paid	$ 7,432	7,843
Capital leases payable maturity
Amount obligated to be paid	$ 7,432	7,843
Affiliates | Capital leases for broadcasting tower facilities, interest at 8.0%
Related person transactions
Interest rate (as a percent)	8.00%
Amount obligated to be paid	$ 2,749	390
Capital leases payable maturity
Amount obligated to be paid	$ 2,749	390
Affiliates | Capital leases for broadcasting tower facilities, interest at 9.0%
Related person transactions
Interest rate (as a percent)	9.00%
Amount obligated to be paid	$ 1,958	0
Capital leases payable maturity
Amount obligated to be paid	$ 1,958	0
Affiliates | Capital leases for broadcasting tower facilities, interest at 10.5%
Related person transactions
Interest rate (as a percent)	10.50%
Amount obligated to be paid	$ 4,690	4,797
Capital leases payable maturity
Amount obligated to be paid	$ 4,690	$ 4,797