Allowance for Noncovered Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Analysis of Credit Quality of Noncovered Loan Portfolio) (Details) (USD $)
In Thousands, unless otherwise specified

Sep. 30, 2012

Jun. 30, 2012

Dec. 31, 2011

Sep. 30, 2011

Jun. 30, 2011

Dec. 31, 2010

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans, net

$ 2,854,603

$ 2,827,259

Noncovered Loans [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

2,476,844

2,348,371

Recorded Investment

2,476,844

2,348,371

Loans and Leases Receivable, Allowance

51,527

52,196

53,041

50,422

54,057

60,993

Loans, net

2,425,317

2,295,330

Pass [Member] | Noncovered Loans [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

2,308,142

2,134,167

Special Mention [Member] | Noncovered Loans [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

34,274

55,850

Substandard [Member] | Noncovered Loans [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

134,358

157,965

Doubtful [Member] | Noncovered Loans [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

384

Unlikely to be Collected Financing Receivable [Member] | Noncovered Loans [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

Commercial Portfolio Segment [Member] | Noncovered Loans [Member] | Secured Loans [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

1,096,999

981,417

Loans and Leases Receivable, Allowance

25,962

26,505

24,745

23,298

22,320

21,811

Commercial Portfolio Segment [Member] | Noncovered Loans [Member] | Unsecured Loans [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

42,066

47,406

Loans and Leases Receivable, Allowance

768

772

689

738

573

738

Commercial Portfolio Segment [Member] | Pass [Member] | Noncovered Loans [Member] | Secured Loans [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

1,024,510

908,883

Commercial Portfolio Segment [Member] | Pass [Member] | Noncovered Loans [Member] | Unsecured Loans [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

41,496

46,732

Commercial Portfolio Segment [Member] | Special Mention [Member] | Noncovered Loans [Member] | Secured Loans [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

18,596

18,703

Commercial Portfolio Segment [Member] | Special Mention [Member] | Noncovered Loans [Member] | Unsecured Loans [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

318

Commercial Portfolio Segment [Member] | Substandard [Member] | Noncovered Loans [Member] | Secured Loans [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

53,893

53,447

Commercial Portfolio Segment [Member] | Substandard [Member] | Noncovered Loans [Member] | Unsecured Loans [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

544

356

Commercial Portfolio Segment [Member] | Doubtful [Member] | Noncovered Loans [Member] | Secured Loans [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

384

Commercial Portfolio Segment [Member] | Doubtful [Member] | Noncovered Loans [Member] | Unsecured Loans [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

Commercial Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member] | Noncovered Loans [Member] | Secured Loans [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

Commercial Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member] | Noncovered Loans [Member] | Unsecured Loans [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

Real Estate Portfolio Segment [Member] | Noncovered Loans [Member] | One-to-Four Family Residential [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

47,825

64,063

Loans and Leases Receivable, Allowance

565

673

654

942

847

1,100

Real Estate Portfolio Segment [Member] | Noncovered Loans [Member] | Commercial Land [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

43,889

50,681

Loans and Leases Receivable, Allowance

422

270

488

760

894

634

Real Estate Portfolio Segment [Member] | Noncovered Loans [Member] | Income Property Multifamily [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

585,878

533,993

Loans and Leases Receivable, Allowance

9,034

8,726

9,551

8,973

14,709

15,210

Real Estate Portfolio Segment [Member] | Noncovered Loans [Member] | Owner Occupied [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

398,319

404,789

Loans and Leases Receivable, Allowance

8,331

9,037

9,606

6,690

6,479

9,692

Real Estate Portfolio Segment [Member] | Pass [Member] | Noncovered Loans [Member] | One-to-Four Family Residential [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

45,393

58,517

Real Estate Portfolio Segment [Member] | Pass [Member] | Noncovered Loans [Member] | Commercial Land [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

39,842

44,166

Real Estate Portfolio Segment [Member] | Pass [Member] | Noncovered Loans [Member] | Income Property Multifamily [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

557,868

492,922

Real Estate Portfolio Segment [Member] | Pass [Member] | Noncovered Loans [Member] | Owner Occupied [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

356,582

351,928

Real Estate Portfolio Segment [Member] | Special Mention [Member] | Noncovered Loans [Member] | One-to-Four Family Residential [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

407

2,040

Real Estate Portfolio Segment [Member] | Special Mention [Member] | Noncovered Loans [Member] | Commercial Land [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

Real Estate Portfolio Segment [Member] | Special Mention [Member] | Noncovered Loans [Member] | Income Property Multifamily [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

8,496

16,002

Real Estate Portfolio Segment [Member] | Special Mention [Member] | Noncovered Loans [Member] | Owner Occupied [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

3,940

13,590

Real Estate Portfolio Segment [Member] | Substandard [Member] | Noncovered Loans [Member] | One-to-Four Family Residential [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

2,025

3,506

Real Estate Portfolio Segment [Member] | Substandard [Member] | Noncovered Loans [Member] | Commercial Land [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

4,047

6,510

Real Estate Portfolio Segment [Member] | Substandard [Member] | Noncovered Loans [Member] | Income Property Multifamily [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

19,514

25,069

Real Estate Portfolio Segment [Member] | Substandard [Member] | Noncovered Loans [Member] | Owner Occupied [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

37,797

39,266

Real Estate Portfolio Segment [Member] | Doubtful [Member] | Noncovered Loans [Member] | One-to-Four Family Residential [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

Real Estate Portfolio Segment [Member] | Doubtful [Member] | Noncovered Loans [Member] | Commercial Land [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

Real Estate Portfolio Segment [Member] | Doubtful [Member] | Noncovered Loans [Member] | Income Property Multifamily [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

Real Estate Portfolio Segment [Member] | Doubtful [Member] | Noncovered Loans [Member] | Owner Occupied [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

Real Estate Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member] | Noncovered Loans [Member] | One-to-Four Family Residential [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

Real Estate Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member] | Noncovered Loans [Member] | Commercial Land [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

Real Estate Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member] | Noncovered Loans [Member] | Income Property Multifamily [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

Real Estate Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member] | Noncovered Loans [Member] | Owner Occupied [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

Real Estate Construction Portfolio Segment [Member] | Noncovered Loans [Member] | Income Property Multifamily [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

27,027

20,877

Loans and Leases Receivable, Allowance

362

755

665

274

Real Estate Construction Portfolio Segment [Member] | Noncovered Loans [Member] | Owner Occupied [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

23,974

12,790

Loans and Leases Receivable, Allowance

Real Estate Construction Portfolio Segment [Member] | Noncovered Loans [Member] | Land and Acquisition [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

19,082

25,201

Loans and Leases Receivable, Allowance

1,469

1,651

2,331

3,015

2,852

3,769

Real Estate Construction Portfolio Segment [Member] | Noncovered Loans [Member] | Residential Construction [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

30,930

23,931

Loans and Leases Receivable, Allowance

1,182

1,197

864

1,524

1,704

2,292

Real Estate Construction Portfolio Segment [Member] | Pass [Member] | Noncovered Loans [Member] | Income Property Multifamily [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

27,027

12,812

Real Estate Construction Portfolio Segment [Member] | Pass [Member] | Noncovered Loans [Member] | Owner Occupied [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

23,974

12,790

Real Estate Construction Portfolio Segment [Member] | Pass [Member] | Noncovered Loans [Member] | Land and Acquisition [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

11,467

12,349

Real Estate Construction Portfolio Segment [Member] | Pass [Member] | Noncovered Loans [Member] | Residential Construction [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

25,130

16,764

Real Estate Construction Portfolio Segment [Member] | Special Mention [Member] | Noncovered Loans [Member] | Income Property Multifamily [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

Real Estate Construction Portfolio Segment [Member] | Special Mention [Member] | Noncovered Loans [Member] | Owner Occupied [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

Real Estate Construction Portfolio Segment [Member] | Special Mention [Member] | Noncovered Loans [Member] | Land and Acquisition [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

2,035

2,684

Real Estate Construction Portfolio Segment [Member] | Special Mention [Member] | Noncovered Loans [Member] | Residential Construction [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

476

1,649

Real Estate Construction Portfolio Segment [Member] | Substandard [Member] | Noncovered Loans [Member] | Income Property Multifamily [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

8,065

Real Estate Construction Portfolio Segment [Member] | Substandard [Member] | Noncovered Loans [Member] | Owner Occupied [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

Real Estate Construction Portfolio Segment [Member] | Substandard [Member] | Noncovered Loans [Member] | Land and Acquisition [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

5,580

10,168

Real Estate Construction Portfolio Segment [Member] | Substandard [Member] | Noncovered Loans [Member] | Residential Construction [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

5,324

5,518

Real Estate Construction Portfolio Segment [Member] | Doubtful [Member] | Noncovered Loans [Member] | Income Property Multifamily [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

Real Estate Construction Portfolio Segment [Member] | Doubtful [Member] | Noncovered Loans [Member] | Owner Occupied [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

Real Estate Construction Portfolio Segment [Member] | Doubtful [Member] | Noncovered Loans [Member] | Land and Acquisition [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

Real Estate Construction Portfolio Segment [Member] | Doubtful [Member] | Noncovered Loans [Member] | Residential Construction [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

Real Estate Construction Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member] | Noncovered Loans [Member] | Income Property Multifamily [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

Real Estate Construction Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member] | Noncovered Loans [Member] | Owner Occupied [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

Real Estate Construction Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member] | Noncovered Loans [Member] | Land and Acquisition [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

Real Estate Construction Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member] | Noncovered Loans [Member] | Residential Construction [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

Consumer Portfolio Segment [Member] | Noncovered Loans [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

160,855

183,223

Loans and Leases Receivable, Allowance

2,166

2,049

2,719

3,701