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Acquisitions - Narratives (Details) - USD ($) $ in Thousands	1 Months Ended					6 Months Ended	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Jul. 30, 2016	May 31, 2016	Aug. 31, 2015	Jan. 27, 2018	Jan. 26, 2019	Jul. 29, 2017	Jul. 30, 2016
Business Acquisition [Line Items]
Business Combination, Purchase Accounting Adjustment to Receivables							$ 500
Payments to Acquire Businesses, Net of Cash Acquired						$ 0	$ 20,917	$ 26,070	$ 157,183
Aero Communications, Inc. [Member]
Business Acquisition [Line Items]
Payment to acquire business, net of cash acquired	$ 20,900
Texstar Enterprises, Inc.
Business Acquisition [Line Items]
Payment to acquire business, net of cash acquired		$ 26,100
TelCom Construction, Inc.
Business Acquisition [Line Items]
Payment to acquire business, net of cash acquired					$ 48,800
NextGen Telecom Services Group, Inc.
Business Acquisition [Line Items]
Payment to acquire business, net of cash acquired				$ 5,600
Goodman Networks, Inc. Wireline Operations
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired			$ 100,900
Working Capital Adjustment | Goodman Networks, Inc. Wireline Operations
Business Acquisition [Line Items]
Business Acquisition, Working Capital Adjustment			$ 6,600

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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