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Costs and Estimated Earnings on Uncompleted Contracts (Summary of Costs and Estimated Earnings on Uncompleted Contracts) (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
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Costs and Estimated Earnings on Uncompleted Contracts [Abstract] |  |
Costs incurred on uncompleted contracts | $ 62,098 | $ 98,674
Estimated earnings | 26,850 | 64,589
Billings to date | (72,247) | (152,608)
Costs and estimated earnings on uncompleted contracts | $ 16,701 | $ 10,655

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Balance Type: | credit
Period Type: | instant

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- Definition Contract with Customer, Estimated Earnings + References No definition available. + Details
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Balance Type: | debit
Period Type: | instant

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- Definition Contract with Customer, Net Asset (Liability) + References No definition available. + Details
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Namespace Prefix: | sbac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 340 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479483/340-40-50-3 + Details
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Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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