Loans Receivable and Allowance for Loan Losses (Consumer Loan Credit Exposures, Performing or Nonperforming) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Jun. 30, 2013 loan	Dec. 31, 2012 loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Number of Loans Classified as Doubtful	0	0
Consumer loans receivable	$ 307,745	$ 296,432
Residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans receivable	90,590	83,899
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans receivable	217,155	212,533
Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans receivable	297,190	290,383
Performing [Member] | Residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans receivable	83,457	80,696
Performing [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans receivable	213,733	209,687
Nonperforming [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans receivable	10,555	6,049
Nonperforming [Member] | Residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans receivable	7,133	3,203
Nonperforming [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans receivable	$ 3,422	$ 2,846