Segment Data (Tables)

12 Months Ended

Dec. 31, 2015

Segment Data [Abstract]

Segment Reporting Information Disclosure

							Not
	Domestic Site		Int'l Site		Site		Identified by
	Leasing		Leasing		Development		Segment		Total
For the year ended December 31, 2015	(in thousands)
Revenues	$	1,236,758	$	243,876	$	157,840	$	—	$	1,638,474
Cost of revenues (2)		252,493		72,162		119,744		—		444,399
Operating profit		984,265		171,714		38,096		—		1,194,075
Selling, general, and administrative		67,413		16,196		12,247		19,095		114,951
Acquisition related adjustments and expenses		9,975		1,889		—		—		11,864
Asset impairment and decommission costs		93,977		806		—		—		94,783
Depreciation, amortization and accretion		534,436		118,886		3,662		3,037		660,021
Operating income (loss)		278,464		33,937		22,187		(22,132)		312,456
Other expense (principally interest expense
and other expense)								(479,051)		(479,051)
Loss before provision for income taxes										(166,595)
Cash capital expenditures (3)		709,337		94,693		3,495		13,339		820,864
For the year ended December 31, 2014
Revenues	$	1,157,293	$	202,909	$	166,794	$	—	$	1,526,996
Cost of revenues (2)		247,237		54,076		127,172		—		428,485
Operating profit		910,056		148,833		39,622		—		1,098,511
Selling, general, and administrative		67,611		16,762		9,074		9,870		103,317
Acquisition related adjustments and expenses		3,351		4,447		—		—		7,798
Asset impairment and decommission costs		21,538		2,263		—		—		23,801
Depreciation, amortization and accretion		515,150		104,447		2,453		5,022		627,072
Operating income (loss)		302,406		20,914		28,095		(14,892)		336,523
Other expense (principally interest expense
and other expense)								(352,183)		(352,183)
Loss before provision for income taxes										(15,660)
Cash capital expenditures (3)		547,774		1,221,786		3,851		24,352		1,797,763
For the year ended December 31, 2013
Revenues	$	1,048,756	$	84,257	$	171,853	$	—	$	1,304,866
Cost of revenues (2)		242,839		27,933		137,481		—		408,253
Operating profit		805,917		56,324		34,372		—		896,613
Selling, general, and administrative		59,320		10,065		7,760		8,331		85,476
Acquisition related adjustments and expenses		6,525		12,673		—		—		19,198
Asset impairment and decommission costs		26,478		2,482		—		—		28,960
Depreciation, amortization and accretion		484,053		44,973		2,280		2,028		533,334
Operating income (loss)		229,541		(13,869)		24,332		(10,359)		229,645
Other expense (principally interest expense
and other expense)								(286,863)		(286,863)
Loss before provision for income taxes										(57,218)
Cash capital expenditures (3)		261,775		578,938		6,693		105		847,511

							Not
	Domestic Site		Int'l Site		Site		Identified by
	Leasing		Leasing		Development		Segment (1)		Total
	(in thousands)
Assets
As of December 31, 2015	$	5,639,495	$	1,564,496	$	56,631	$	142,593	$	7,403,215
As of December 31, 2014	$	5,554,753	$	1,989,571	$	78,633	$	218,168	$	7,841,125

(1)Assets not identified by segment consist primarily of general corporate assets.

(2)Excludes depreciation, amortization, and accretion.

(3)Includes cash paid for capital expenditures and acquisitions and vehicle capital lease additions.