Condensed Consolidated Statement of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net income (loss)	$ 81,936	$ 64,848
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, amortization and accretion	105,432	105,172
Amortization of deferred financing costs	692	692
Asset write-down charges	344	0
Changes in assets and liabilities:
Increase (decrease) in accounts payable	449	(1,078)
Increase (decrease) in deferred revenues, deferred ground lease payable and other liabilities	2,992	2,252
Decrease (increase) in receivables	231	1,918
Decrease (increase) in other current assets, deferred site rental receivable, long-term prepaid rent and other assets	(9,155)	(1,049)
Net cash provided by (used for) operating activities	182,921	172,755
Cash flows from investing activities:
Capital expenditures	(32,414)	(26,099)
Net cash provided by (used for) investing activities	(32,414)	(26,099)
Cash flows from financing activities:
Distributions to Member	(159,623)	(143,402)
Net cash provided by (used for) financing activities	(159,623)	(143,402)
Net increase (decrease) in cash and cash equivalents	(9,116)	3,254
Cash and cash equivalents at beginning of period	30,771	19,550
Cash and cash equivalents at end of period	$ 21,655	$ 22,804