Long-Lived Assets (Details) (USD $)	1 Months Ended		3 Months Ended			9 Months Ended
	Feb. 28, 2013	Jan. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Property, plant and equipment
Property, plant and equipment			$ 705,519,000			$ 705,519,000		$ 639,343,000
Less accumulated depreciation and amortization			(187,645,000)			(187,645,000)		(132,146,000)
Total property, plant and equipment, net			517,874,000			517,874,000		507,197,000
Depreciation expense			19,300,000		17,300,000	56,500,000	49,900,000
Selling price of parcel of land and warehouse	13,900,000
Commissions and other costs paid through escrow						800,000
Proceeds from sale, net of commissions and other costs paid						13,118,000
Gain on sale of parcel of land and warehouse				6,500,000		6,546,000
Amount required to spend on training employees on broadband telecommunication deployment and operation			300,000			300,000
Proceeds received from sale of radio towers		$ 3,600,000