Income Taxes (Details Textual) (USD $)	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Sep. 30, 2012	Dec. 31, 2012
Income Tax Contingency [Line Items]
Income tax benefit	$ 28,133,000	$ 24,258,000
Effective tax expense (benefit) rate	32.80%	34.20%
Federal statutory rate	35.00%
Deferred Income Tax Expense (Benefit)	(21,428,000)	(24,373,000)
NOL carryforwards	172,300,000
Estimated NOL tax attribute reduction	581,800,000
Expiration period of NOL carryforwards			2022 to 2033
State NOL deferred tax asset	10,300,000
Tax valuation allowance	195,800,000			192,500,000
Federal tax valuation allowance	162,100,000			159,500,000
State tax valuation allowance	33,700,000			33,000,000
Decrease in valuation allowance	700,000
Unrecognized tax benefits, total	3,800,000			3,800,000
Unrecognized tax benefits, affect tax rate if recognized	3,800,000
Blackfoot Telecommunications Group [Member]
Income Tax Contingency [Line Items]
Deferred Income Tax Expense (Benefit)	$ 6,700,000