Revenues - Revenues Disaggregated by Revenue Stream (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation Of Revenue [Line Items]
Total revenue from contracts with customers	$ 56,469	$ 67,391
Total revenues	278,034	272,586
Fiber Infrastructure
Disaggregation Of Revenue [Line Items]
Total revenue from contracts with customers	55,310	66,224
Total revenues	73,393	77,650
Fiber Infrastructure | Lit Backhaul
Disaggregation Of Revenue [Line Items]
Total revenue from contracts with customers	19,438	25,044
Fiber Infrastructure | Enterprise and Wholesale
Disaggregation Of Revenue [Line Items]
Total revenue from contracts with customers	20,935	21,000
Fiber Infrastructure | E-Rate and Government
Disaggregation Of Revenue [Line Items]
Total revenue from contracts with customers	14,276	19,364
Fiber Infrastructure | Other
Disaggregation Of Revenue [Line Items]
Total revenue from contracts with customers	661	816
Leasing
Disaggregation Of Revenue [Line Items]
Total revenue from contracts with customers	1,159	1,167
Total revenues	204,641	194,936
ASU 2016-02
Disaggregation Of Revenue [Line Items]
Total revenues	221,565	205,195
ASU 2016-02 | Fiber Infrastructure
Disaggregation Of Revenue [Line Items]
Total revenues	18,083	11,426
ASU 2016-02 | Leasing
Disaggregation Of Revenue [Line Items]
Total revenues	$ 203,482	$ 193,769