Property And Equipment, Net (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Property and Equipment [Line Items]
Depreciation and amortization	$ 41,747	$ 37,756	$ 111,996	$ 103,111
Property and Equipment [Member]
Property and Equipment [Line Items]
Depreciation and amortization	$ 35,200	$ 32,000	$ 95,000	$ 87,900