Segment Information - Summary of Total Assets by Business Segment (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Total assets	$ 3,280,677	$ 3,318,752
Leasing
Segment Reporting Information [Line Items]
Total assets	2,175,234	2,238,517
Fiber Infrastructure
Segment Reporting Information [Line Items]
Total assets	925,379	914,082
Consumer CLEC
Segment Reporting Information [Line Items]
Total assets	14,634	14,239
Towers
Segment Reporting Information [Line Items]
Total assets	129,853	18,004
Corporate
Segment Reporting Information [Line Items]
Total assets	$ 35,577	$ 133,910