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

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2009

Financing Receivable, Recorded Investment [Line Items]

Loans, net

$ 2,864,803

$ 2,827,259

Noncovered Loans [Member]

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

2,525,710

2,348,371

Loans and Leases Receivable, Allowance

52,244

53,041

60,993

53,478

Loans, net

2,473,466

2,295,330

Pass [Member] | Noncovered Loans [Member]

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

2,336,039

2,134,167

Special Mention [Member] | Noncovered Loans [Member]

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

37,758

55,850

Substandard [Member] | Noncovered Loans [Member]

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

151,913

157,965

Doubtful [Member] | Noncovered Loans [Member]

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

384

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

1,106,551

981,417

Loans and Leases Receivable, Allowance

27,270

24,745

21,811

20,409

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

45,343

47,406

Loans and Leases Receivable, Allowance

753

689

738

1,560

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

1,011,722

908,883

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

44,788

46,732

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

29,222

18,703

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

318

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

65,607

53,447

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

529

356

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

384

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

Financing Receivable, Recorded Investment [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]

Financing Receivable, Recorded Investment [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]

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

28,342

20,877

Loans and Leases Receivable, Allowance

316

665

274

2,453

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

36,211

12,790

Loans and Leases Receivable, Allowance

102

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

31,664

23,931

Loans and Leases Receivable, Allowance

635

864

2,292

2,304

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

18,496

25,201

Loans and Leases Receivable, Allowance

1,171

2,331

3,769

5,711

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

28,342

12,812

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

36,211

12,790

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

28,705

16,764

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

12,741

12,349

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

1,142

1,649

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

1,351

2,684

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

Financing Receivable, Recorded Investment [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]

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

1,817

5,518

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

4,404

10,168

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

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

Financing Receivable, Recorded Investment [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]

Financing Receivable, Recorded Investment [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]

Financing Receivable, Recorded Investment [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]

Financing Receivable, Recorded Investment [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]

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

44,192

64,063

Loans and Leases Receivable, Allowance

694

654

1,100

1,072

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

47,327

50,681

Loans and Leases Receivable, Allowance

460

488

634

664

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

614,812

533,993

Loans and Leases Receivable, Allowance

11,033

9,551

15,210

9,860

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

395,173

404,789

Loans and Leases Receivable, Allowance

6,362

9,606

9,692

6,690

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

40,346

58,517

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

43,401

44,166

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

581,671

492,922

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

357,063

351,928

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

406

2,040

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

3,688

16,002

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

1,848

13,590

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

3,440

3,506

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

3,926

6,510

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

29,453

25,069

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

36,262

39,266

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

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

Financing Receivable, Recorded Investment [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]

Financing Receivable, Recorded Investment [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]

Financing Receivable, Recorded Investment [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]

Financing Receivable, Recorded Investment [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]

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

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

Financing Receivable, Recorded Investment [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

157,599

183,223

Loans and Leases Receivable, Allowance

2,437