INCOME TAXES: (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred tax assets:
Allowance for doubtful accounts	$ 1,315	$ 1,417
Accruals	1,974	2,200
Total current deferred tax assets before valuation allowance	3,289	3,617
Valuation allowance	(3,117)	(4,683)
Total current deferred tax (liabilities) assets, net	172	(1,066)
Fixed assets	901	477
Stock-based compensation	1,200	890
Net operating loss carryforwards	336,020	309,546
Other	563	696
Total noncurrent deferred tax assets before valuation allowance	338,684	311,609
Valuation allowance	(355,299)	(317,782)
Net noncurrent deferred tax (liabilities) assets	(16,615)	(6,173)
Total deferred tax (liabilities) assets	(16,443)	(7,239)
Deferred tax liabilities:
Prepaid expenses	(122)	(134)
Total current deferred tax liability	(122)	(134)
Intangible assets	(209,278)	(170,673)
Partnership interests	(26,039)	(36,895)
Other	(531)	(504)
Total noncurrent deferred tax liabilities	(235,848)	(208,072)
Total deferred tax liabilities	(235,970)	(208,206)
Net current deferred tax asset (liability)	50	(1,200)
Net noncurrent deferred tax liability	(252,463)	(214,245)
Net deferred tax liability	$ (252,413)	$ (215,445)