Related Party Transactions (Expenses Incurred Under Services Agreements) (Details) (USD $) In Thousands, unless otherwise specified	7 Months Ended	12 Months Ended
Dec. 31, 2010	Dec. 31, 2011	May 31, 2010	May 31, 2009
Related Party Transactions [Abstract]
Cost of services agreements	$ 7,866	$ 1,603	$ 14,403	$ 8,501

Costs of sales and operating expenses for the period incurred from transactions with related parties.

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

-Publisher FASB

-Name Accounting Standards Codification

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2)

-SubTopic 10

-Topic 225

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

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