Segment Information (Financial Information For Each Of The Company's Reporting Segments) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Segment Reporting Information [Line Items]
Revenue from external customers	$ 283,873	$ 265,847	$ 260,029	$ 245,072	$ 241,945	$ 228,819	$ 207,984	$ 197,738	$ 1,054,821		$ 876,486		$ 780,449
Cost of revenues									704,048		595,287		536,087
Selling, general, and administrative expenses									113,470		84,592		65,525
Acquisition-related expenses									18,050		15,400		3,332
Loss (gain) on disposal of assets									3,224		2,790		1,787
Adjusted EBITDA									253,936		218,842		189,533
Depreciation and accretion expense									75,622		68,480		61,499
Amortization of intangible assets									35,768		27,336		21,712
Interest expense, net, including amortization of deferred financing costs and note discount									33,812		23,086		22,057
Redemption costs for early extinguishment of debt									9,075
Income tax expense (benefit)									28,174		42,018		27,009
Capital expenditures									109,909	[1]	77,153	[1]	92,803	[1]
Eliminations [Member]
Segment Reporting Information [Line Items]
Intersegment revenues									(11,157)		(8,782)		(10,176)
Cost of revenues									(11,177)		(8,282)		(9,665)
Selling, general, and administrative expenses													429
Adjusted EBITDA									17		(497)		(941)
Depreciation and accretion expense									(55)		(80)		6
Capital expenditures									(20)	[1]	(49)	[1]	(383)	[1]
U.S. [Member]
Segment Reporting Information [Line Items]
Revenue from external customers									722,051		657,390		626,241
Intersegment revenues									9,567		8,319		10,087
Cost of revenues									474,000		426,635		423,813
Selling, general, and administrative expenses									88,553		67,890		54,635
Acquisition-related expenses									3,336		8,036		3,207
Loss (gain) on disposal of assets									1,840		1,626		1,716
Adjusted EBITDA									185,510		183,498		168,915
Depreciation and accretion expense									43,872		41,530		37,831
Amortization of intangible assets									24,649		21,101		20,088
Interest expense, net, including amortization of deferred financing costs and note discount									32,101		21,494		21,005
Income tax expense (benefit)									25,020		42,017		27,069
Capital expenditures									57,434	[1]	53,023	[1]	62,496	[1]
Europe [Member]
Segment Reporting Information [Line Items]
Revenue from external customers									292,157		178,448		117,814
Intersegment revenues									1,509		407
Cost of revenues									207,213		140,812		93,030
Selling, general, and administrative expenses									21,795		13,575		7,491
Acquisition-related expenses									14,714		7,333		120
Loss (gain) on disposal of assets									1,086		(123)		61
Adjusted EBITDA									64,618		33,580		18,256
Depreciation and accretion expense									27,546		22,448		19,894
Amortization of intangible assets									10,449		5,541		1,437
Interest expense, net, including amortization of deferred financing costs and note discount									1,491		1,262		647
Income tax expense (benefit)									2,485		(190)
Capital expenditures									46,252	[1]	21,745	[1]	21,839	[1]
Other International [Member]
Segment Reporting Information [Line Items]
Revenue from external customers									40,613		40,648		36,394
Intersegment revenues									81		56		89
Cost of revenues									34,012		36,122		28,909
Selling, general, and administrative expenses									3,122		3,127		2,970
Acquisition-related expenses											31		5
Loss (gain) on disposal of assets									298		1,287		10
Adjusted EBITDA									3,791		2,261		3,303
Depreciation and accretion expense									4,259		4,582		3,768
Amortization of intangible assets									670		694		187
Interest expense, net, including amortization of deferred financing costs and note discount									220		330		405
Income tax expense (benefit)									669		191		(60)
Capital expenditures									$ 6,243	[1]	$ 2,434	[1]	$ 8,851	[1]

[1] Capital expenditure amounts include payments made for exclusive license agreements, site acquisition costs and other intangible assets. Additionally, capital expenditure amounts for Mexico (included in the Other International segment) are reflected gross of any noncontrolling interest amounts.