Segment Information - Summary of Total Assets by Business Segment (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Total assets	$ 2,851,675	$ 2,542,636
Leasing
Segment Reporting Information [Line Items]
Total assets	2,343,690	2,527,915
Fiber Infrastructure
Segment Reporting Information [Line Items]
Total assets	493,263
Consumer CLEC
Segment Reporting Information [Line Items]
Total assets	$ 14,722	$ 14,721