Operating and Direct Financing Leases (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011
Estimated future minimum rental payments to be received and paid under the lease contracts
2012	$ 62,400
2013	49,500
2014	48,100
2015	47,100
2016	47,300
Head Lease Receipts [Member]
Estimated future minimum rental payments to be received and paid under the lease contracts
2012	28,859
2013	28,843
2014	28,828
2015	22,188
2016	21,242
Thereafter	260,306
Total	390,266
Sublease Payments [Member]
Estimated future minimum rental payments to be received and paid under the lease contracts
2012	24,999
2013	24,999
2014	24,999
2015	24,999
2016	24,999
Thereafter	306,356
Total	$ 431,351

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Future minimum rental payments in aggregate as of the balance sheet date under operating leases.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 13

-Paragraph 23

-Subparagraph b(ii)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6454179&loc=d3e41551-112718

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Future rental payments receivable within one year of the balance sheet date under an operating lease.

+ References

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- Definition

Future rental payments receivable within the fifth year from the balance sheet date under an operating lease.

+ References

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- Definition

Future rental payments receivable within the fourth year from the balance sheet date under an operating lease.

+ References

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Future rental payments receivable within the third year from the balance sheet date under an operating lease.

+ References

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Future rental payments receivable within the second year from the balance sheet date under an operating lease.

+ References

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- Definition

Future minimum lease payments receivable under operating leases for periods greater than five years following the balance sheet date.

+ References

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