LONG-TERM DEBT (Details) (USD $)			1 Months Ended						6 Months Ended							6 Months Ended			6 Months Ended							6 Months Ended									6 Months Ended					6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	May 31, 2011 BDC	May 02, 2011 M3 Wireless, Ltd.	Jun. 30, 2012 Credit facility Minimum LIBOR	Jun. 30, 2012 Credit facility Minimum Base rate	Jun. 30, 2012 Credit facility Maximum LIBOR	Jun. 30, 2012 Credit facility Maximum Base rate	Jun. 30, 2012 Amended 2010 Credit Facility	Jun. 30, 2012 Amended 2010 Credit Facility Base rate	Jun. 30, 2012 Amended 2010 Credit Facility One-week LIBOR	Jun. 30, 2012 Amended 2010 Credit Facility One-month LIBOR	Jun. 30, 2012 Term loans	Dec. 31, 2011 Term loans	Sep. 30, 2010 Term loans Credit facility	Jun. 30, 2012 Term loans Amended 2010 Credit Facility item	Sep. 30, 2010 Term loans Amended 2010 Credit Facility	Jun. 30, 2012 Term Loan A-1	Jun. 30, 2012 Term Loan A-1 LIBOR	Jun. 30, 2012 Term Loan A-1 Amended 2010 Credit Facility Base rate	Jun. 30, 2012 Term Loan A-1 Amended 2010 Credit Facility Minimum Base rate	Jun. 30, 2012 Term Loan A-1 Amended 2010 Credit Facility Minimum One-month LIBOR	Jun. 30, 2012 Term Loan A-1 Amended 2010 Credit Facility Maximum Base rate	Jun. 30, 2012 Term Loan A-1 Amended 2010 Credit Facility Maximum One-month LIBOR	Jun. 30, 2012 Term Loan A-2	Jun. 30, 2012 Term Loan A-2 Amended 2010 Credit Facility LIBOR	Jun. 30, 2012 Term Loan A-2 Amended 2010 Credit Facility Base rate	Jun. 30, 2012 Term Loan A-2 Amended 2010 Credit Facility Minimum LIBOR	Jun. 30, 2012 Term Loan A-2 Amended 2010 Credit Facility Minimum Base rate	Jun. 30, 2012 Term Loan A-2 Amended 2010 Credit Facility Maximum LIBOR	Jun. 30, 2012 Term Loan A-2 Amended 2010 Credit Facility Maximum Base rate	Dec. 31, 2011 Revolver loan	Sep. 30, 2010 Revolver loan Credit facility	Jun. 30, 2012 Revolver loan Amended 2010 Credit Facility	Jun. 30, 2012 Revolver loan Amended 2010 Credit Facility LIBOR	Jun. 30, 2012 Revolver loan Amended 2010 Credit Facility Base rate	Jun. 30, 2012 Revolver loan Amended 2010 Credit Facility Minimum	Jun. 30, 2012 Revolver loan Amended 2010 Credit Facility Minimum Base rate	Jun. 30, 2012 Revolver loan Amended 2010 Credit Facility Minimum One-month LIBOR	Jun. 30, 2012 Revolver loan Amended 2010 Credit Facility Maximum	Jun. 30, 2012 Revolver loan Amended 2010 Credit Facility Maximum Base rate	Jun. 30, 2012 Revolver loan Amended 2010 Credit Facility Maximum One-month LIBOR	Sep. 30, 2010 Swingline sub-facility Credit facility	Jun. 30, 2012 Swingline sub-facility Credit facility Minimum Base rate	Jun. 30, 2012 Swingline sub-facility Credit facility Maximum Base rate	Jun. 30, 2012 Swingline sub-facility Amended 2010 Credit Facility	Jun. 30, 2012 Swingline sub-facility Amended 2010 Credit Facility Minimum Base rate	Jun. 30, 2012 Swingline sub-facility Amended 2010 Credit Facility Maximum Base rate	Jun. 30, 2012 Note Payable - Other	Dec. 31, 2011 Note Payable - Other	May 02, 2011 Note Payable - Other M3 Wireless, Ltd. Keytech Ltd.
Long-term debt
Outstanding debt	$ 279,912,000	$ 286,021,000											$ 275,000,000	$ 252,311,000				$ 125,000,000							$ 150,000,000							$ 28,156,000		$ 41,000,000															$ 4,912,000	$ 5,752,000
Less: current portion	(15,680,000)	(25,068,000)
Total long-term debt	264,232,000	260,953,000
Less: debt discount	(5,997,000)	(3,807,000)
Net carrying amount	258,235,000	257,146,000
Maximum borrowing capacity															275,000,000	275,000,000																	100,000,000	100,000,000									10,000,000			10,000,000
Number of term loans																2
Additional borrowings subject to lender approval															50,000,000	100,000,000	50,000,000
Description of variable rate basis										Base Rate	One-week LIBOR	One-month LIBOR							LIBOR	Base Rate						LIBOR	Base Rate								LIBOR	Base Rate
Basis spread on variable rate (as a percent)					2.75%	1.75%	4.25%	3.25%		1.50%											1.00%	2.00%	2.50%	3.50%				2.50%	1.50%	4.00%	3.00%							1.00%	2.00%		2.50%	3.50%		1.25%	2.75%		0.50%	2.00%
Weighted-average interest rate (as a percent)									4.45%
Deferred financing costs									700,000
Term loan owed to related party				$ 7,012,000																																															$ 7,000,000
Ownership interest held by minority shareholder (as a percent)			42.00%
Effective interest rate (as a percent)																																																			7.00%
Commitment fee (as a percent)																																					0.25%			0.50%