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Commitment and Contingencies - Narratives (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended
Dec. 31, 2016
Jul. 29, 2017
Jul. 28, 2018
Jan. 27, 2018
Loss Contingencies [Line Items]        
Loss contingency, estimated loss       $ 13.0
Loss contingency accrual, payments $ 0.1      
Letters of credit outstanding amount     $ 48.6 48.6
Standby Letters of Credit        
Loss Contingencies [Line Items]        
Letters of credit outstanding amount     48.6  
Goodman Networks, Inc. Wireline Operations        
Loss Contingencies [Line Items]        
Escrow deposit     0.3  
Funds released from escrow   $ 2.5    
Performance Guarantee and Surety Bond [Member]        
Loss Contingencies [Line Items]        
Guarantor obligations, carrying value     134.5 118.1
Indemnification Portion Subject to Certain Conditions, Not Less Than Twelve Months | Goodman Networks, Inc. Wireline Operations        
Loss Contingencies [Line Items]        
Escrow deposit     22.5  
Indemnification Portion Subject to Seller Satisfaction of Certain Liabilities | Goodman Networks, Inc. Wireline Operations        
Loss Contingencies [Line Items]        
Escrow deposit     $ 9.7 $ 10.0