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Goodwill and Intangible Assets and Liabilities - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Aug. 30, 2019
Dec. 31, 2018
Goodwill And Intangible Assets And Liabilities [Line Items]            
Goodwill $ 690,672   $ 690,672     $ 692,385
Remaining weighted average amortization period of intangible assets     18 years 3 months 18 days      
Amortization 6,300 $ 6,300 $ 18,600 $ 19,000    
Estimated amortization expense for 2019 26,000   26,000      
Estimated amortization expense for 2020 25,500   25,500      
Estimated amortization expense for 2021 24,700   24,700      
Estimated amortization expense for 2022 24,600   24,600      
Estimated amortization expense for 2023 24,600   24,600      
Uniti Fibers Midwest | MIP            
Goodwill And Intangible Assets And Liabilities [Line Items]            
Goodwill $ 2,200   $ 2,200   $ 2,200