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Significant Accounting Policies (Commitments Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2013
store
Jun. 30, 2012
Significant Accounting Policies [Abstract]    
Purchases of premises and equipment $ 4,347 $ 1,338
Number of Real Estate Properties Purchased 3  
Rental Expense, Annual Expected Decrease $ 200