INCOME TAXES: (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred tax assets:
Allowance for doubtful accounts	$ 979	$ 1,130
Accruals	560	512
Total current deferred tax assets before valuation allowance	1,539	1,642
Valuation allowance	(1,330)	(1,584)
Total current deferred tax assets, net	209	58
Intangible assets	15,073	16,528
Fixed assets	0	1,459
Stock-based compensation	1,348	1,474
Net operating loss carryforwards	284,702	249,059
Other	668	1,451
Total noncurrent deferred tax assets before valuation allowance	301,791	269,971
Valuation allowance	(278,290)	(243,343)
Net noncurrent deferred tax assets	23,501	26,628
Total deferred tax assets	23,710	26,686
Deferred tax liabilities:
Prepaid expenses	(97)	0
Total current deferred tax liability	(97)	0
Intangible assets	(154,464)	(117,616)
Fixed assets	(110)	0
Partnership interests	(56,606)	(61,728)
Other	(570)	(863)
Total noncurrent deferred tax liabilities	(211,750)	(180,207)
Total deferred tax liabilities	(211,847)	(180,207)
Net current deferred tax asset	112	0
Net noncurrent deferred tax liability	(188,249)	(153,521)
Net deferred tax liability	$ (188,137)	$ (153,521)