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, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Segment Reporting Information [Line Items]
Revenue from external customers	$ 241,945	$ 228,819	$ 207,984	$ 197,738	$ 198,360	$ 199,029	$ 192,020	$ 191,040	$ 876,486		$ 780,449		$ 624,576
Cost of revenues									595,287		536,087		420,115
Selling, general, and administrative expenses									84,592		65,525		55,582
Acquisition-related expenses									15,400		3,332		4,747
Loss (gain) on disposal of assets									2,790		1,787		981
Adjusted EBITDA									218,842		189,533		156,307
Depreciation and accretion expense									68,480		61,499		47,962
Amortization expense									27,336		21,712		17,914
Interest expense, net, including amortization of deferred financing costs and note discount									23,086		22,057		21,109
Income tax expense (benefit)									42,018		27,009		(13,176)
Capital expenditures									77,153	[1]	92,803	[1]	66,886	[1]
Eliminations [Member]
Segment Reporting Information [Line Items]
Intersegment revenues									(8,782)		(10,176)		(4,388)
Cost of revenues									(8,282)		(9,665)		(4,388)
Selling, general, and administrative expenses											429
Adjusted EBITDA									(497)		(941)
Depreciation and accretion expense									(80)		6		(21)
Capital expenditures									(49)	[1]	(383)	[1]
U.S. [Member]
Segment Reporting Information [Line Items]
Revenue from external customers									657,390		626,241		501,439
Intersegment revenues									8,319		10,087		4,277
Cost of revenues									426,635		423,813		329,782
Selling, general, and administrative expenses									67,890		54,635		47,342
Acquisition-related expenses									8,036		3,207		4,747
Loss (gain) on disposal of assets									1,626		1,716		791
Adjusted EBITDA									183,498		168,915		137,840
Depreciation and accretion expense									41,530		37,831		28,719
Amortization expense									21,101		20,088		15,985
Interest expense, net, including amortization of deferred financing costs and note discount									21,494		21,005		17,144
Income tax expense (benefit)									42,017		27,069		(13,176)
Capital expenditures									53,023	[1]	62,496	[1]	46,154	[1]
Europe [Member]
Segment Reporting Information [Line Items]
Revenue from external customers									178,448		117,814		97,665
Intersegment revenues									407
Cost of revenues									140,812		93,030		75,109
Selling, general, and administrative expenses									13,575		7,491		5,950
Acquisition-related expenses									7,333		120
Loss (gain) on disposal of assets									(123)		61		215
Adjusted EBITDA									33,580		18,256		16,554
Depreciation and accretion expense									22,448		19,894		16,194
Amortization expense									5,541		1,437		1,892
Interest expense, net, including amortization of deferred financing costs and note discount									1,262		647		3,260
Income tax expense (benefit)									(190)
Capital expenditures									21,745	[1]	21,839	[1]	20,478	[1]
Other International [Member]
Segment Reporting Information [Line Items]
Revenue from external customers									40,648		36,394		25,472
Intersegment revenues									56		89		111
Cost of revenues									36,122		28,909		19,612
Selling, general, and administrative expenses									3,127		2,970		2,290
Acquisition-related expenses									31		5
Loss (gain) on disposal of assets									1,287		10		(25)
Adjusted EBITDA									2,261		3,303		1,913
Depreciation and accretion expense									4,582		3,768		3,070
Amortization expense									694		187		37
Interest expense, net, including amortization of deferred financing costs and note discount									330		405		705
Income tax expense (benefit)									191		(60)
Capital expenditures									$ 2,434	[1]	$ 8,851	[1]	$ 254	[1]

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