Noncovered Loans (Analysis of Nonaccrual Loans) (Details) (Noncovered Loans [Member], USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	$ 49,465	$ 53,483
Unpaid Principal Balance Nonaccrual Loans	84,027	88,868
Commercial Portfolio Segment [Member] | Secured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	12,839	10,124
Unpaid Principal Balance Nonaccrual Loans	22,511	16,820
Commercial Portfolio Segment [Member] | Unsecured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	213	119
Unpaid Principal Balance Nonaccrual Loans	213	719
Real Estate Portfolio Segment [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	2,244	2,696
Unpaid Principal Balance Nonaccrual Loans	3,070	3,011
Real Estate Portfolio Segment [Member] | Commercial Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	3,444	3,739
Unpaid Principal Balance Nonaccrual Loans	7,291	7,230
Real Estate Portfolio Segment [Member] | Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	10,753	6,775
Unpaid Principal Balance Nonaccrual Loans	15,958	9,265
Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	9,105	8,971
Unpaid Principal Balance Nonaccrual Loans	12,507	10,932
Real Estate Construction Portfolio Segment [Member] | Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	3,754	7,067
Unpaid Principal Balance Nonaccrual Loans	9,057	14,912
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	3,552	7,799
Unpaid Principal Balance Nonaccrual Loans	7,351	16,703
Real Estate Construction Portfolio Segment [Member] | Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	1,671	2,986
Unpaid Principal Balance Nonaccrual Loans	3,801	5,316
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	1,890	3,207
Unpaid Principal Balance Nonaccrual Loans	$ 2,268	$ 3,960