NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: (Details 7) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Apr. 30, 2013 Network affiliation agreements FOX	Dec. 31, 2012 Network affiliation agreements FOX	Jun. 30, 2012 Network affiliation agreements FOX
Summary of Significant Accounting Policies [Line Items]
Compensation and employee insurance	$ 32,099,000	$ 16,665,000
Interest	18,885,000	12,191,000
Other accruals relating to operating expenses	78,013,000	37,498,000		25,000,000	25,000,000	25,000,000
Deferred revenue	14,734,000	13,344,000
Total accrued liabilities	143,731,000	79,698,000
Supplemental Information - Statements of Cash Flows
Income taxes paid related to continuing operations	46,964,000	897,000	1,211,000
Income tax refunds received related to continuing operations	194,000	5,000	8,435,000
Interest paid	110,973,000	98,643,000	110,833,000
Non- cash transactions
Non-cash transactions related to capital lease obligations	300,000	2,300,000	1,400,000
Advertising Expenses
Total advertising expenses	12,200,000	8,700,000	6,200,000
Pension
Liability related to underfunded status of defined benefit pension plan	$ 5,500,000	$ 4,600,000