2019 Acquisition - Additional Information (Details) $ in Millions	Jan. 04, 2019 USD ($) carrier	Dec. 27, 2018 carrier
Business Acquisition [Line Items]
Number of U.S. wireless carriers \| carrier	4	4
Fulton and Mill City
Business Acquisition [Line Items]
Business combination, consideration transferred	$ 1.3
Fulton and Mill City \| Customer Relationships
Business Acquisition [Line Items]
Finite-lived intangible assets acquired	$ 0.2

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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