GOODWILL AND INTANGIBLE ASSETS (Details) (USD $)	12 Months Ended								12 Months Ended
	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2012 U.S. Wireless	Dec. 31, 2011 U.S. Wireless	Dec. 31, 2010 U.S. Wireless	Dec. 31, 2012 U.S. Wireline	Dec. 31, 2011 U.S. Wireline	Dec. 31, 2010 U.S. Wireline	Dec. 31, 2011 Island Wireless Item	Dec. 31, 2012 Island Wireless
Goodwill
Number of reporting units where book value exceeded fair value									1
Changes in the carrying amount of goodwill, by operating segment
Balance at the beginning of the period	$ 44,397,000	$ 45,077,000	$ 32,148,000	$ 32,148,000	$ 32,148,000	$ 7,491,000	$ 7,491,000	$ 7,491,000	$ 4,758,000	$ 5,438,000
Acquired goodwill	3,105,000								3,105,000
Impairment charge	(2,425,000)								(2,425,000)
Balance at the end of the period	$ 45,077,000	$ 45,077,000	$ 32,148,000	$ 32,148,000	$ 32,148,000	$ 7,491,000	$ 7,491,000	$ 7,491,000	$ 5,438,000	$ 5,438,000