Notes Payable, Commitments and Contingencies (Details 1) (Interest Rate Swap [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2010
Rollforward of derivatives liability
Beginning Balance	$ 9,517
Termination of swaps	(9,235)
Change in fair value	(282)
Ending Balance	0
Term Facility [Member]
Rollforward of derivatives liability
Beginning Balance	8,662
Termination of swaps	(9,235)
Change in fair value	573
Ending Balance	0
Floating rate LIBOR based borrowings [Member]
Rollforward of derivatives liability
Beginning Balance	855
Change in fair value	(855)
Ending Balance	$ 0

Fair value as of the balance sheet date of the gross assets less the gross liabilities of a derivative liability or group of derivative liabilities.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13495-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 45

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 45

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13433-108611

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant