SEGMENT REPORTING (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 item	Sep. 30, 2013	Dec. 31, 2013
SEGMENT REPORTING
Number of reportable segments			4
Revenue
Revenue	$ 89,393	$ 79,350	$ 247,836	$ 215,807
Depreciation and amortization	12,842	12,335	37,752	36,517
Non-cash stock-based compensation	1,002	926	3,381	2,898
Operating income (loss)	28,158	20,038	66,014	48,023
Segment Assets
Net fixed assets	253,508		253,508		254,632
Goodwill	45,077		45,077		45,077
Total assets	843,431		843,431		859,719
Capital Expenditures
Capital expenditures			41,699	55,171
U.S. Wireless
Revenue
Revenue	44,306	32,796	110,153	80,597
International wireless
Revenue
Revenue	21,557	22,895	67,127	66,162
Wireline
Revenue
Revenue	21,531	21,504	64,344	62,945
Equipment and other
Revenue
Revenue	1,999	2,155	6,212	6,103
Reconciling Items
Revenue
Depreciation and amortization	999	378	2,899	965
Non-cash stock-based compensation	1,002	926	3,381	2,898
Operating income (loss)	(6,252)	(8,320)	(18,804)	(18,485)
Segment Assets
Net fixed assets	13,156		13,156		6,731
Total assets	342,677		342,677		390,944
Capital Expenditures
Capital expenditures			2,096	3,151
U.S. Wireless | Discontinued operations
Segment Assets
Total assets	73,492		73,492		4,748
U.S. Wireless | Operating segments
Revenue
Revenue	44,736	33,057	111,273	81,367
Depreciation and amortization	3,657	4,039	10,413	12,119
Operating income (loss)	27,585	18,293	63,826	40,472
Segment Assets
Net fixed assets	75,930		75,930		73,592
Goodwill	32,148		32,148		32,148
Total assets	178,208		178,208		151,094
Capital Expenditures
Capital expenditures			26,496	27,736
U.S. Wireless | Operating segments | U.S. Wireless
Revenue
Revenue	44,306	32,796	110,153	80,597
U.S. Wireless | Operating segments | Wireline
Revenue
Revenue	152	152	457	457
U.S. Wireless | Operating segments | Equipment and other
Revenue
Revenue	278	109	663	313
International Integrated Telephony | Operating segments
Revenue
Revenue	21,831	23,074	65,026	67,974
Depreciation and amortization	4,397	4,551	13,111	13,476
Operating income (loss)	5,065	7,028	15,293	19,596
Segment Assets
Net fixed assets	110,870		110,870		118,917
Total assets	200,770		200,770		197,903
Capital Expenditures
Capital expenditures			6,816	9,039
International Integrated Telephony | Operating segments | International wireless
Revenue
Revenue	6,399	7,046	20,054	20,330
International Integrated Telephony | Operating segments | Wireline
Revenue
Revenue	15,249	15,640	44,399	46,493
International Integrated Telephony | Operating segments | Equipment and other
Revenue
Revenue	183	388	573	1,151
Island Wireless | Operating segments
Revenue
Revenue	16,627	17,443	51,855	50,300
Depreciation and amortization	2,596	2,551	7,810	7,705
Operating income (loss)	2,231	3,292	8,210	7,226
Segment Assets
Net fixed assets	26,622		26,622		29,310
Goodwill	5,438		5,438		5,438
Total assets	78,417		78,417		74,427
Capital Expenditures
Capital expenditures			3,966	4,014
Island Wireless | Operating segments | International wireless
Revenue
Revenue	15,158	15,849	47,073	45,832
Island Wireless | Operating segments | Equipment and other
Revenue
Revenue	1,469	1,594	4,782	4,468
U.S. Wireline | Operating segments
Revenue
Revenue	6,199	5,776	19,682	16,166
Depreciation and amortization	1,193	816	3,519	2,252
Operating income (loss)	(471)	(255)	(2,511)	(786)
Segment Assets
Net fixed assets	26,930		26,930		26,082
Goodwill	7,491		7,491		7,491
Total assets	43,359		43,359		45,351
Capital Expenditures
Capital expenditures			2,325	11,231
U.S. Wireline | Operating segments | Wireline
Revenue
Revenue	6,130	5,712	19,488	15,995
U.S. Wireline | Operating segments | Equipment and other
Revenue
Revenue	$ 69	$ 64	$ 194	$ 171