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Secured Credit Facility (Details) (USD $)
In Millions, unless otherwise specified
6 Months Ended 9 Months Ended
Jun. 30, 2012
Sep. 30, 2012
Jun. 23, 2008
Mar. 19, 2008
Secured Credit Facility [Abstract]        
NU Telecom Dividends payable   2,050,000    
Indebtedness ratio   3.5    
Total leverage ratio   3.5    
Covenant compliance

Our loan agreements include restrictions on our ability to pay cash dividends to our stockholders. However, we are allowed to pay dividends (a) (i) in an amount up to $2,050,000 in any year and (ii) in any amount if our "Total Leverage Ratio," that is, the ratio of our "Indebtedness" to "EBITDA" (in each case as defined in the loan documents) is equal to or less than 3:50 to 1:00, and (b) in either case if we are not in default or potential default under our loan agreements. As of September 30, 2012, our Total Leverage Ratio fell below the3:50 to 1:00 ratio, thus eliminating any restrictions on our ability to pay cash dividends to our stockholders.

     
Aggregate indebtedness   $ 36.0 $ 6.0 $ 39.0
Weighted average interest rate   5.52%    
Additional borrowings   11.0    
Available under credit facilities   5.2    
Currently outstanding   $ 5.8    
Effective weighted average interest rate   2.24%