COMMITMENTS AND CONTINGENCIES: (Details) (USD $)	3 Months Ended		9 Months Ended			0 Months Ended	9 Months Ended		1 Months Ended	3 Months Ended			9 Months Ended			1 Months Ended		1 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Aug. 08, 2013 Fisher item	Sep. 30, 2013 TTBG item	Oct. 02, 2013 TTBG item	Sep. 30, 2013 New Age Media item	Sep. 30, 2013 Network affiliation agreements FOX	Sep. 30, 2012 Network affiliation agreements FOX	Jun. 30, 2012 Network affiliation agreements FOX	Sep. 30, 2013 Network affiliation agreements FOX	Sep. 30, 2012 Network affiliation agreements FOX	May 14, 2012 Network affiliation agreements FOX item	May 31, 2012 Option agreement FTS item	May 14, 2012 Option agreement FTS WUTB (MNT) station in Baltimore	May 31, 2012 Option agreement FTS Maximum item	Feb. 28, 2013 Pending acquisition agreement Barrington Broadcasting Group, LLC item	Jun. 30, 2013 Pending acquisition agreement TTBG item	Jul. 31, 2013 Pending acquisition agreement Perpetual Corporation and Charleston Television, LLC Scenario forecast item	Jun. 30, 2013 Pending acquisition agreement Deerfield TTBG item
COMMITMENTS AND CONTINGENCIES
Number of affiliates															20						7
Purchase price pursuant to option																	$ 2,700,000
Option to purchase stations, number of markets																		3
Number of designated markets																4
Number of markets						8	1		3										15	3
Amount paid pursuant to the agreements												25,000,000
Other assets	229,677,000		229,677,000		189,984,000							50,000,000
Other accrued liabilities												25,000,000
Amortization of definite-lived intangible assets and other assets	17,168,000	10,562,000	48,727,000	26,375,000						2,200,000	2,200,000		6,600,000	3,300,000
Purchase price									$ 90,000,000										$ 370,000,000	$ 115,400,000	$ 985,000,000
Number of television stations owned						22	2	2	8										18	4
Number of stations to which sales services were provided																			6
Number of stations located in specified markets																			24
Number of stations to which purchasing rights will be assigned																						2
Number of stations to which sales and other services will be provided																						2