Quarterly report pursuant to Section 13 or 15(d)

BROADCAST LICENSES (Details)

v3.8.0.1
BROADCAST LICENSES (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Indefinite-lived Intangible Assets [Line Items]    
Balance, beginning of period before cumulative loss on impairment $ 486,455 $ 494,058
Accumulated loss on impairment, Beginning Balance (105,541) (105,541)
Balance, beginning of period after cumulative loss on impairment 380,914 388,517
Capital projects to improve broadcast signal and strength 0 5
Indefinite-lived Intangible Assets, Written off Related to Sale of Business Unit (221) (7,997)
Balance, end of period before cumulative loss on impairment 486,234 486,455
Accumulated loss on impairment, Ending Balance (105,541) (105,541)
Balance, end of period after cumulative loss on impairment 380,693 380,914
Radio Stations [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Acquisitions 0 191
FM Translators [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Acquisitions $ 0 $ 198