Quarterly report pursuant to Section 13 or 15(d)

Tower Sale and Leaseback (Narrative) (Details)

v3.5.0.2
Tower Sale and Leaseback (Narrative) (Details) - Vertical Bridge Tower Sale [Member]
$ in Millions
1 Months Ended
Aug. 31, 2016
USD ($)
Sale Leaseback Transaction [Line Items]  
Towers conveyed to VBT 276
Sale Leaseback Transaction, Net Proceeds $ 90.8
Renewal Options 8
Lessee Leasing Arrangements, Renewal Term 5 years
Annual rent increase 2.00%
Reduction of asset retirement obligation $ 3.4
Imputed Interest Rate 7.10%
Minimum [Member]  
Sale Leaseback Transaction [Line Items]  
Lessee Leasing Arrangements, Term of Contract 10 years
Maximum [Member]  
Sale Leaseback Transaction [Line Items]  
Lessee Leasing Arrangements, Term of Contract 50 years