Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Accrued Expenses And Other Liabilities (Narrative) (Details)

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Accrued Expenses And Other Liabilities (Narrative) (Details)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Accrued Expenses And Other Liabilities [Abstract]    
Weighted average amortization period for lease deficiency (months) 109 110