SEGMENT REPORTING (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 item	Sep. 30, 2012	Dec. 31, 2012
SEGMENT REPORTING
Number of reportable segments			4
Revenue
Revenue	$ 79,350	$ 73,312	$ 215,807	$ 207,884
Depreciation and amortization	12,335	12,421	36,517	38,304
Non-cash stock-based compensation	926	774	3,419	2,585
Operating income (loss)	20,038	16,171	48,023	35,518
Segment Assets
Net fixed assets	253,210		253,210		238,324
Goodwill	45,077		45,077		45,077
Total assets	1,089,166		1,089,166		910,875
Assets associated with discontinued operations	4,923		4,923		380,765
Capital Expenditures
Capital expenditures			55,171	28,575
U.S. wireless
Revenue
Revenue	32,796	29,042	80,597	77,970
International wireless
Revenue
Revenue	22,895	21,014	66,162	60,186
Wireline
Revenue
Revenue	21,504	21,289	62,945	64,094
Equipment and other
Revenue
Revenue	2,155	1,967	6,103	5,634
U.S. Wireless
Revenue
Revenue	33,057	29,279	81,367	78,632
Depreciation and amortization	4,039	4,200	12,119	13,634
Operating income (loss)	18,293	14,879	40,472	35,799
Segment Assets
Net fixed assets	69,291		69,291		52,944
Goodwill	32,148		32,148		32,148
Total assets	725,836		725,836		161,038
Capital Expenditures
Capital expenditures			27,736	7,516
U.S. Wireless | Wireline
Revenue
Revenue	152	152	457	450
U.S. Wireless | Equipment and other
Revenue
Revenue	109	85	313	212
International Integrated Telephony
Revenue
Revenue	23,074	23,566	67,974	70,579
Depreciation and amortization	4,551	4,406	13,476	13,424
Operating income (loss)	7,028	6,596	19,596	16,973
Segment Assets
Net fixed assets	118,143		118,143		126,532
Total assets	195,412		195,412		191,314
Capital Expenditures
Capital expenditures			9,039	7,362
International Integrated Telephony | International wireless
Revenue
Revenue	7,046	6,838	20,330	19,891
International Integrated Telephony | Wireline
Revenue
Revenue	15,640	16,351	46,493	49,354
International Integrated Telephony | Equipment and other
Revenue
Revenue	388	377	1,151	1,334
Island Wireless
Revenue
Revenue	17,443	15,627	50,300	44,242
Depreciation and amortization	2,551	2,875	7,705	8,444
Operating income (loss)	3,292	1,043	7,226	(319)
Segment Assets
Net fixed assets	30,568		30,568		33,745
Goodwill	5,438		5,438		5,438
Total assets	79,343		79,343		77,120
Capital Expenditures
Capital expenditures			4,014	3,915
Island Wireless | International wireless
Revenue
Revenue	15,849	14,176	45,832	40,295
Island Wireless | Equipment and other
Revenue
Revenue	1,594	1,451	4,468	3,947
U.S. Wireline
Revenue
Revenue	5,776	4,840	16,166	14,431
Depreciation and amortization	816	697	2,252	2,135
Operating income (loss)	(255)	(566)	(786)	(1,655)
Segment Assets
Net fixed assets	25,858		25,858		17,489
Goodwill	7,491		7,491		7,491
Total assets	43,859		43,859		30,888
Capital Expenditures
Capital expenditures			11,231	7,280
U.S. Wireline | Wireline
Revenue
Revenue	5,712	4,786	15,995	14,290
U.S. Wireline | Equipment and other
Revenue
Revenue	64	54	171	141
Reconciling Items
Revenue
Depreciation and amortization	378	243	965	667
Non-cash stock-based compensation	926	774	2,898	2,566
Operating income (loss)	(8,320)	(5,781)	(18,485)	(15,280)
Segment Assets
Net fixed assets	9,350		9,350		7,614
Total assets	44,716		44,716		69,750
Capital Expenditures
Capital expenditures			$ 3,151	$ 2,502