Significant Accounting Policies (Loans Modified Under Troubled Debt Restructuring) (Details)	12 Months Ended
	Dec. 31, 2012
Financing Receivable, Modifications [Line Items]
Time period sustained for payment history of principal and interest payments to move them to performing status	6 months
Time period of real estate residential troubled debt restructurings reducing borrower's monthly payments by decreasing the interest rate charged on the loan	24 months
Number of minimum days when principal or interest is past due is placed in nonaccrual category	90 days