Commitments and Contingencies Disclosure [Line Items]

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- Definition

Courts Awarded Damages

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- Definition

Individual Hotel Lawsuits Resolved By Hotel Operators

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- Definition

The carrying amount as of the balance sheet date of the combined total of loss contingency reserves.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9, 10, 11, 12

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- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9, 10, 11, 12

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- Definition

The estimated maximum amount of possible loss from the contingency.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 14
-Paragraph 3

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9, 10, 11, 12

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Legal Proceedings - Additional Information (Detail) (USD $)	Dec. 31, 2010 Keystone	Feb. 08, 2010 Keystone Breach of Contract Legal Claim 1	Feb. 08, 2010 Keystone Slander Legal Claim 1	Feb. 12, 2010 Keystone Exemplary Member Legal Claim 2	Dec. 31, 2010 Pending or Threatened Litigation	Dec. 31, 2010 Maximum
Commitments and Contingencies Disclosure [Line Items]
Damages awarded		$ 34,300,000	$ 39,000,000	$ 7,500,000
Damages awarded, accrual	47,000,000
Individual hotel-level claims that may be settled without our consent						150,000
Loss contingency accrual					6,000,000
Aggregate losses on legal proceedings, high estimate					$ 8,000,000