Equity Method Investments (Restated) - Condensed Financial Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Dec. 31, 2012	Sep. 30, 2013 Alaska Wireless Network, LLC [Member]
Schedule Of Results Related To Equity Accounted Investees [Line Items]
Current Assets			$ 85,753	$ 76,857
Non-Current Assets				530,908
Current Liabilities			86,976	26,136
Non-Current Liabilities				43,190
Equity			(34,683)	631,382
Operating Revenues	96,750	272,709		58,826
Gross Profit				36,568
Operating income	24,639	44,466		25,333
Net income	8,244	8,586		25,259
Adjusted Free Cash Flow				$ 20,068