LONG-TERM DEBT (Details) (USD $)			1 Months Ended	0 Months Ended		3 Months Ended						0 Months Ended		3 Months Ended							3 Months Ended											3 Months Ended							3 Months Ended			1 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	May 31, 2011 Bermuda wireless operations	Sep. 16, 2011 Credit facility LIBOR	Sep. 16, 2011 Credit facility Base rate	Mar. 31, 2013 Amended Credit Facility	Mar. 31, 2013 Amended Credit Facility One-week LIBOR	Mar. 31, 2013 Amended Credit Facility One-month LIBOR	Mar. 31, 2013 Amended Credit Facility Maximum	Mar. 31, 2013 Term loans	Dec. 31, 2012 Term loans	May 18, 2012 Term loans Amended Credit Facility item	Mar. 31, 2013 Term Loan A-1 Amended Credit Facility	Mar. 31, 2013 Term Loan A-1 Amended Credit Facility LIBOR	Mar. 31, 2013 Term Loan A-1 Amended Credit Facility Base rate	Mar. 31, 2013 Term Loan A-1 Amended Credit Facility Minimum LIBOR	Mar. 31, 2013 Term Loan A-1 Amended Credit Facility Minimum Base rate	Mar. 31, 2013 Term Loan A-1 Amended Credit Facility Maximum LIBOR	Mar. 31, 2013 Term Loan A-1 Amended Credit Facility Maximum Base rate	Mar. 31, 2013 Term Loan A-2 Amended Credit Facility	Mar. 31, 2013 Term Loan A-2 Amended Credit Facility LIBOR	Mar. 31, 2013 Term Loan A-2 Amended Credit Facility Base rate	Mar. 31, 2013 Term Loan A-2 Amended Credit Facility Minimum LIBOR	Mar. 31, 2013 Term Loan A-2 Amended Credit Facility Minimum Base rate	Mar. 31, 2013 Term Loan A-2 Amended Credit Facility Maximum LIBOR	Mar. 31, 2013 Term Loan A-2 Amended Credit Facility Maximum Base rate	Mar. 31, 2013 Revolver loan Minimum LIBOR	Mar. 31, 2013 Revolver loan Minimum Base rate	Mar. 31, 2013 Revolver loan Maximum LIBOR	Mar. 31, 2013 Revolver loan Maximum Base rate	May 18, 2012 Revolver loan Amended Credit Facility	Mar. 31, 2013 Revolver loan Amended Credit Facility LIBOR	Mar. 31, 2013 Revolver loan Amended Credit Facility Base rate	Mar. 31, 2013 Revolver loan Amended Credit Facility Minimum	Mar. 31, 2013 Revolver loan Amended Credit Facility Maximum	Mar. 31, 2013 Swingline sub-facility Credit facility Minimum Base rate	Mar. 31, 2013 Swingline sub-facility Credit facility Maximum Base rate	May 18, 2012 Swingline sub-facility Amended Credit Facility	Mar. 31, 2013 Swingline sub-facility Amended Credit Facility Base rate	Mar. 31, 2013 Swingline sub-facility Amended Credit Facility Minimum Base rate	Mar. 31, 2013 Swingline sub-facility Amended Credit Facility Maximum Base rate	Oct. 31, 2012 Letter of credit sub-facility Amended Credit Facility	Mar. 31, 2013 Letter of credit sub-facility Amended Credit Facility	Oct. 29, 2012 Letter of credit sub-facility Amended Credit Facility	Mar. 31, 2013 Note Payable - Other	Dec. 31, 2012 Note Payable - Other	May 02, 2011 Note Payable - Other M3 Wireless, Ltd. Keytech Ltd.
Long-term debt
Outstanding debt	$ 272,143,000	$ 272,072,000								$ 268,000,000	$ 268,000,000		$ 125,000,000							$ 150,000,000																							$ 100,000		$ 4,143,000	$ 4,072,000
Less: current portion	(19,600,000)	(15,680,000)
Total long-term debt	252,543,000	256,392,000
Less: debt discount	(5,237,000)	(5,492,000)
Net carrying amount	247,306,000	250,900,000
Maximum borrowing capacity												275,000,000																			100,000,000							10,000,000						55,000,000
Mobility Fund letters of credit outstanding																																											0
Number of term loans												2
Maximum aggregate additional borrowings subject to lender approval												100,000,000
Description of variable rate basis				LIBOR	Base Rate		one-week LIBOR	one-month LIBOR						LIBOR	Base Rate						LIBOR	Base Rate										LIBOR	Base Rate						Base Rate
Basis spread on variable rate (as a percent)							1.50%	1.50%								2.00%	1.00%	3.50%	2.50%				2.50%	1.50%	4.00%	3.00%	2.00%	1.00%	3.50%	2.50%						0.50%	2.00%			0.50%	2.00%
Percentage of equity interests in certain domestic subsidiaries pledged						100.00%			65.00%
Weighted-average interest rate (as a percent)						4.37%
Availability under the facility																																											99,900,000
Commitment fee (as a percent)																																		0.25%	0.50%							1.75%
Term loan owed to related party																																															$ 7,000,000
Ownership interest held by minority shareholder (as a percent)			42.00%
Effective interest rate (as a percent)																																															7.00%