COMMITMENTS AND CONTINGENCIES: (Details) (USD $)	3 Months Ended			3 Months Ended			1 Months Ended		1 Months Ended	0 Months Ended	1 Months Ended		3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Mar. 31, 2013 Network affiliation agreements FOX	Jun. 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	May 01, 2013 Acquisitions and divestments, pending agreements COX Media Group item	Feb. 28, 2013 Acquisitions and divestments, pending agreements Barrington Broadcasting Group, LLC item	Apr. 30, 2013 Acquisitions and divestments, pending agreements Fisher item	Sep. 30, 2013 Acquisitions and divestments, pending agreements Fisher	Jun. 30, 2013 Acquisitions and divestments, pending agreements Fisher	Apr. 02, 2013 Acquisitions and divestments, pending agreements OTA Broadcasting LLC WLWC-TV	Feb. 28, 2013 Acquisitions and divestments, pending agreements Cunningham	May 01, 2013 Acquisitions and divestments, pending agreements Deerfield COX Media Group
COMMITMENTS AND CONTINGENCIES
Number of affiliates						20
Purchase price pursuant to option								$ 2,700,000
Option to purchase stations, number of markets									3
Number of designated markets							4
Number of markets										4	15	8
Amount paid pursuant to the agreements					25,000,000
Other assets	195,713,000		189,984,000		50,000,000
Other accrued liabilities					25,000,000
Amortization of definite-lived intangible assets and other assets	16,002,000	5,819,000		2,200,000
Price of assets acquired/sold											370,000,000				13,800,000	47,000,000
Number of television stations owned										4	18
Number of stations to which sales services were provided										1	6	3
Number of stations located in specified markets											24	20
Value of merger transaction												373,300,000
Number of radio stations in Seattle market												4
Number of simulcasts to which sales services were provided												2
Percentage of acquiree outstanding shares of which affirmative vote is required for closure of transaction													67.00%	67.00%
Cash paid										99,000,000
Working capital adjustment										4,300,000
Purchase price to be paid by Deerfield																	$ 400,000