STOCKHOLDERS' DEFICIT - Summary of Restricted Stock Outstanding and Restricted Stock Activity (Detail) shares in Thousands	12 Months Ended
	Dec. 31, 2017 $ / shares shares
Restricted stock awards
Awards
Outstanding at beginning of period (in shares) | shares	5,772
Granted (in shares) | shares	1,438
Vested (restriction lapsed) (in shares) | shares	(677)
Forfeited (in shares) | shares	(314)
Outstanding at end of period (in shares) | shares	6,219
Price
Outstanding at beginning of period (in dollars per share) | $ / shares	$ 4.43
Granted (in dollars per share) | $ / shares	1.75
Vested (restriction lapsed) (in dollars per share) | $ / shares	4.57
Forfeited (in dollars per share) | $ / shares	4.09
Outstanding at end of period (in dollars per share) | $ / shares	$ 3.81
CCOH's restricted stock
Awards
Outstanding at beginning of period (in shares) | shares	2,743
Granted (in shares) | shares	2,539
Vested (restriction lapsed) (in shares) | shares	(1,040)
Forfeited (in shares) | shares	(342)
Outstanding at end of period (in shares) | shares	3,900
Price
Outstanding at beginning of period (in dollars per share) | $ / shares	$ 7.63
Granted (in dollars per share) | $ / shares	4.30
Vested (restriction lapsed) (in dollars per share) | $ / shares	7.16
Forfeited (in dollars per share) | $ / shares	7.39
Outstanding at end of period (in dollars per share) | $ / shares	$ 5.61