Noncovered Loans Noncovered Loans (Analysis of Troubled Debt Restructurings) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012 contract	Dec. 31, 2011
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Additional Commitment To Lend	$ 236	$ 535
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0
Noncovered Loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	2	10
Pre-Modification Outstanding Recorded Investment	4,474	2,344
Post-Modification Outstanding Recorded Investment	2,844	2,344
Noncovered Loans [Member] | Secured Loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	1	6
Pre-Modification Outstanding Recorded Investment	195	659
Post-Modification Outstanding Recorded Investment	194	659
Noncovered Loans [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	1
Pre-Modification Outstanding Recorded Investment	0	369
Post-Modification Outstanding Recorded Investment	0	369
Noncovered Loans [Member] | Income Property Multifamily [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	1	2
Pre-Modification Outstanding Recorded Investment	4,279	1,280
Post-Modification Outstanding Recorded Investment	2,650	1,280
Noncovered Loans [Member] | Residential Construction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	1
Pre-Modification Outstanding Recorded Investment	0	36
Post-Modification Outstanding Recorded Investment	$ 0	$ 36