Noncovered Loans (Analysis of Nonaccrual Loans) (Details) (Noncovered Loans [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	$ 32,886	$ 37,395
Unpaid Principal Balance Nonaccrual Loans	51,261	57,877
Commercial Portfolio Segment [Member] | Secured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	9,383	9,037
Unpaid Principal Balance Nonaccrual Loans	16,192	17,821
Commercial Portfolio Segment [Member] | Unsecured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	121	262
Unpaid Principal Balance Nonaccrual Loans	121	262
Real Estate Portfolio Segment [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	1,684	2,349
Unpaid Principal Balance Nonaccrual Loans	2,023	2,672
Real Estate Portfolio Segment [Member] | Commercial Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	3,347	4,076
Unpaid Principal Balance Nonaccrual Loans	6,701	7,491
Real Estate Portfolio Segment [Member] | Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	8,230	8,520
Unpaid Principal Balance Nonaccrual Loans	11,439	10,815
Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	5,825	6,608
Unpaid Principal Balance Nonaccrual Loans	6,997	7,741
Real Estate Construction Portfolio Segment [Member] | Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	0	0
Real Estate Construction Portfolio Segment [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	0	0
Real Estate Construction Portfolio Segment [Member] | Land and Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	2,646	3,084
Unpaid Principal Balance Nonaccrual Loans	5,841	6,704
Real Estate Construction Portfolio Segment [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	388	1,816
Unpaid Principal Balance Nonaccrual Loans	388	2,431
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	1,262	1,643
Unpaid Principal Balance Nonaccrual Loans	$ 1,559	$ 1,940