Condensed Consolidating Financial Statements Condensed Consolidating Financial Statements (Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Condensed Financial Statements, Captions [Line Items]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 58,448	$ 135,731	$ 129,685	$ 197,248
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	4,502	0	10,052	0
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	1,171	2,260	1,957	4,112
Other Comprehensive Income (Loss), before Tax	5,673	2,260	12,009	4,112
Income tax (expense) benefit	(432)	(838)	(722)	(1,525)
Other Comprehensive Income (Loss), Net of Tax	5,241	1,422	11,287	2,587
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	63,689	137,153	140,972	199,835
Comprehensive Loss, Net of Tax, Attributable to Noncontrolling Interest	207	0	337	0
Comprehensive income	63,896	137,153	141,309	199,835
Consolidation, Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(125,366)		(244,946)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	(9,221)		(15,374)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	0		0
Other Comprehensive Income (Loss), before Tax	(9,221)		(15,374)
Income tax (expense) benefit	0		0
Other Comprehensive Income (Loss), Net of Tax	(9,221)		(15,374)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	(134,587)		(260,320)
Comprehensive Loss, Net of Tax, Attributable to Noncontrolling Interest	0		0
Comprehensive income	(134,587)		(260,320)
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	58,655		130,022
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	9,221		15,374
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	1,171		1,957
Other Comprehensive Income (Loss), before Tax	10,392		17,331
Income tax (expense) benefit	(432)		(722)
Other Comprehensive Income (Loss), Net of Tax	9,960		16,609
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	68,615		146,631
Comprehensive Loss, Net of Tax, Attributable to Noncontrolling Interest	0		0
Comprehensive income	68,615		146,631
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	115,271		238,022
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	9,221		15,374
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	0		0
Other Comprehensive Income (Loss), before Tax	9,221		15,374
Income tax (expense) benefit	0		0
Other Comprehensive Income (Loss), Net of Tax	9,221		15,374
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	124,492		253,396
Comprehensive Loss, Net of Tax, Attributable to Noncontrolling Interest	432		854
Comprehensive income	124,924		254,250
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	9,888		6,587
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	(4,719)		(5,322)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	0		0
Other Comprehensive Income (Loss), before Tax	(4,719)		(5,322)
Income tax (expense) benefit	0		0
Other Comprehensive Income (Loss), Net of Tax	(4,719)		(5,322)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	5,169		1,265
Comprehensive Loss, Net of Tax, Attributable to Noncontrolling Interest	(225)		(517)
Comprehensive income	$ 4,944		$ 748