Tenant Leases (Tables)

3 Months Ended

Mar. 31, 2014

Tenant Leases [Abstract]

Annual Minimum Tower Lease Income

	As of December 31, 2013		As of March 31, 2014
For the year ended	(in thousands)
2014	$	1,047,083	$	1,099,064
2015		948,851		1,000,515
2016		820,805		866,892
2017		702,205		743,691
2018		556,499		596,435