Equity Method Investments (Restated) - Schedule of Company's Ownership Interest and Investment in TekMate and AWN (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Schedule Of Results Related To Equity Accounted Investees [Line Items]
Equity method investment		$ 2,028
Restated [Member]
Schedule Of Results Related To Equity Accounted Investees [Line Items]
Equity method investment	270,699
TekMate, LLC [Member]
Schedule Of Results Related To Equity Accounted Investees [Line Items]
Percentage ownership interest in equity method investment	49.00%
Equity method investment		2,028
TekMate, LLC [Member] | Restated [Member]
Schedule Of Results Related To Equity Accounted Investees [Line Items]
Equity method investment	2,024
Alaska Wireless Network, LLC [Member]
Schedule Of Results Related To Equity Accounted Investees [Line Items]
Percentage ownership interest in equity method investment	33.00%
Alaska Wireless Network, LLC [Member] | Restated [Member]
Schedule Of Results Related To Equity Accounted Investees [Line Items]
Equity method investment	$ 268,675