CONDENSED CONSOLIDATED INCOME STATEMENTS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
REVENUE:
Total revenue	$ 188,798	$ 194,346	$ 556,981	$ 576,253
OPERATING EXPENSES (excluding depreciation and amortization unless otherwise indicated):
Termination and access fees	38,790	48,764	118,224	155,077
Engineering and operations	20,796	20,165	64,077	63,967
Sales and marketing	27,929	33,965	91,306	101,874
Equipment expense	23,408	14,379	65,747	54,447
General and administrative	22,195	25,014	67,102	81,405
Acquisition-related charges	2	98	7	664
Depreciation and amortization	26,048	26,712	79,654	76,903
Gain on disposition of long-lived assets		(2,397)		(2,397)
Total operating expenses	159,168	166,700	486,117	531,940
Income from operations	29,630	27,646	70,864	44,313
OTHER INCOME (EXPENSE):
Interest expense	(2,986)	(4,320)	(10,953)	(12,743)
Interest income	3	99	200	680
Equity in earnings of an unconsolidated affiliate	679	729	3,011	1,484
Other, net	199	255	(133)	854
Other income (expense), net	(2,105)	(3,237)	(7,875)	(9,725)
INCOME BEFORE INCOME TAXES	27,525	24,409	62,989	34,588
Income tax expense	9,513	11,193	24,273	16,074
NET INCOME	18,012	13,216	38,716	18,514
Net loss (income) attributable to non-controlling interests, net of tax of $0.6 million and $0.7 million for the three months ended September 30, 2011 and 2012, respectively, and $1.4 million and $1.8 million for the nine months ended September 30, 2011 and 2012, respectively.	(2,047)	(1,880)	(2,900)	(866)
NET INCOME ATTRIBUTABLE TO ATLANTIC TELE-NETWORK, INC. STOCKHOLDERS	15,965	11,336	35,816	17,648
NET INCOME PER WEIGHTED AVERAGE SHARE ATTRIBUTABLE TO ATLANTIC TELE-NETWORK, INC. STOCKHOLDERS
Basic (in dollars per share)	$ 1.03	$ 0.74	$ 2.31	$ 1.15
Diluted (in dollars per share)	$ 1.02	$ 0.73	$ 2.30	$ 1.14
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic (in shares)	15,560	15,401	15,517	15,393
Diluted (in shares)	15,651	15,489	15,605	15,490
DIVIDENDS PER SHARE APPLICABLE TO COMMON STOCK (in dollars per share)	$ 0.25	$ 0.23	$ 0.71	$ 0.67
U.S. wireless, Retail
REVENUE:
Total revenue	83,269	89,143	254,081	284,221
U.S. wireless, Wholesale
REVENUE:
Total revenue	54,918	57,048	153,854	153,615
International wireless
REVENUE:
Total revenue	21,048	20,377	60,318	52,874
Wireline
REVENUE:
Total revenue	21,120	21,748	63,573	63,305
Equipment and other
REVENUE:
Total revenue	$ 8,443	$ 6,030	$ 25,155	$ 22,238