Loans Receivable And Allowance For Credit Losses (Troubled Debt Restructurings On Financing Receivables) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012 contract	Dec. 31, 2011 contract
Financing Receivable, Modifications [Line Items]
Number of Contracts	62	71
Pre-Restructured Outstanding	$ 13,295	$ 10,331
Post-Restructured Outstanding	13,407	10,380
One-To Four-Family Loans - Originated [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	55	70
Pre-Restructured Outstanding	12,578	10,331
Post-Restructured Outstanding	12,650	10,370
One-To Four-Family Loans - Purchased [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	2
Pre-Restructured Outstanding	555
Post-Restructured Outstanding	598
Multi-Family And Commercial Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	2
Pre-Restructured Outstanding	82
Post-Restructured Outstanding	79
Consumer - Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	3	1
Pre-Restructured Outstanding	80
Post-Restructured Outstanding	$ 80	$ 10