Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 58,448	$ 135,731	$ 129,685	$ 197,248
Other comprehensive income (loss):
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	4,502	0	10,052	0
Unrealized gain (loss) on interest rate swaps	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