Property And Equipment, Net (Narrative) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 31,753	$ 20,954
Segment, Continuing Operations [Member]
Property, Plant and Equipment [Line Items]
Depreciation and amortization	31,753	20,717
Property and Equipment [Member] \| Segment, Continuing Operations [Member]
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 27,600	$ 17,900

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Name:	us-gaap_DepreciationDepletionAndAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration