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Valuation And Qualifying Accounts
 12 Months Ended
Dec. 31, 2024
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Valuation And Qualifying Accounts
SCHEDULE II
SPOK HOLDINGS, INC.
VALUATION AND QUALIFYING ACCOUNTS
Allowance for Credit Losses, Service Credits and OtherBalance at the
Beginning of
the Period		Charged to
Operations		Write-offsBalance at the
End of the
Period
(Dollars in thousands)
Year ended December 31, 2024$1,590 $238 $(832)$996 
Year ended December 31, 2023$1,808 $481 $(699)$1,590 
Year ended December 31, 2022$1,442 $1,268 $(902)$1,808