Revenues - Revenues Disaggregated by Revenue Stream (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation Of Revenue [Line Items]
Total revenue from contracts with customers	$ 58,541	$ 55,658	$ 176,358	$ 185,105
Lease income - operating leases	224,562	211,089	668,754	622,408
Total revenues	283,103	266,747	845,112	807,513
Fiber Infrastructure
Disaggregation Of Revenue [Line Items]
Total revenue from contracts with customers	57,340	54,588	172,805	181,868
Lease income - operating leases	17,140	12,674	53,429	35,167
Total revenues	74,480	67,262	226,234	217,035
Fiber Infrastructure | Lit backhaul
Disaggregation Of Revenue [Line Items]
Total revenue from contracts with customers	19,969	19,381	59,344	67,404
Fiber Infrastructure | Enterprise and wholesale
Disaggregation Of Revenue [Line Items]
Total revenue from contracts with customers	21,423	20,863	63,359	63,190
Fiber Infrastructure | E-Rate and government
Disaggregation Of Revenue [Line Items]
Total revenue from contracts with customers	15,245	13,505	48,026	48,795
Fiber Infrastructure | Other
Disaggregation Of Revenue [Line Items]
Total revenue from contracts with customers	703	839	2,076	2,479
Leasing
Disaggregation Of Revenue [Line Items]
Total revenue from contracts with customers	1,201	1,070	3,553	3,237
Lease income - operating leases	207,422	198,415	615,325	587,241
Total revenues	$ 208,623	$ 199,485	$ 618,878	$ 590,478