INCOME TAXES - Deferred Taxes Temporary Difference (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net operating and capital losses:
Federal	$ 68,455	$ 14,884
State	63,630	65,822
Goodwill and intangible assets	28,879	33,979
Other	44,873	37,812
Deferred tax assets, Gross	205,837	152,497
Valuation allowance for deferred tax assets	(51,846)	(58,333)	$ (58,900)
Total deferred tax assets	153,991	94,164
Deferred Tax Liabilities:
Goodwill and intangible assets	(650,139)	(561,812)
Property & equipment, net	(80,950)	(76,106)
Contingent interest obligations	(20,277)	(30,575)
Other	(11,942)	(10,743)
Total deferred tax liabilities	(763,308)	(679,236)
Net deferred tax liabilities	(609,317)	(585,072)
Valuation allowance
Increase (decrease) in valuation allowance	(6,500)	(600)	7,800
Unrecognized tax benefits
Gross unrecognized tax benefits	4,739	3,257	$ 7,138	$ 16,883
Unrecognized tax benefits that would favorably affect entity's effective tax rates from continuing operations, if recognized	$ 3,900	$ 2,600