Commitments and Contingencies (Details) (USD $)	6 Months Ended	12 Months Ended	23 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012
National Telecommunications Information Administration Broadband Technology Opportunities Program grant [Abstract]
Approximate amount of capital expenditure for advanced high-capacity broadband network pursuant to Broadband Technology Opportunities Program (BTOP) grant	$ 24,000,000
Approximate amount of reimbursement pursuant to Broadband Technology Opportunities Program (BTOP) grant	16,800,000
Capital expenditure incurred	1,617,000	12,664,000	14,281,000
NTIA reimbursements received	$ 1,426,000	$ 6,945,000	$ 8,371,000