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Description of the business and summary of significant accounting policies: - Acquisition of Sprint Communications - Pro Forma Information (Details) - Wireline Network Holdings LLC - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Description of the business:    
Service revenue $ 1,121,680 $ 1,170,904
Operating loss from continuing operations (314,440) (711,036)
Net income 1,123,620 621,571
Gain on bargain purchase 1,400,000 1,400,000
Net increase (reduction) to historical depreciation expense based on fair value of property and equipment 29,500 58,000
Amortization expense related to customer relationship intangible assets 600 1,800
Autonomous entity expense adjustments   45,700
Amortization of unfavorable lease liabilities 1,000 5,600
Amortization of unfavorable lease liabilities operation expenses 16,800 50,400
Amortization of unfavorable lease liabilities increase interest expense 3,900 10,900
Impact to income tax expense from pro-forma and autonomous entity adjustments 2,600 17,200
Loss on impairment   477,300
Gain on sale of IP addresses   120,800
IP Transit Services Agreement    
Description of the business:    
Interest income from amortization of discount recorded $ 14,700 $ 36,200