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

Mar. 31, 2013

Dec. 31, 2012

Mar. 31, 2012

Dec. 31, 2011

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

Loans, net

$ 2,933,306

$ 2,864,803

Noncovered Loans [Member]

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

Loans and Leases Receivable, Gross, Carrying Amount

2,621,212

2,525,710

Recorded Investment

2,621,212

2,525,710

Loans and Leases Receivable, Allowance

51,119

52,244

52,283

53,041

Loans, net

2,570,093

2,473,466

Pass [Member] | Noncovered Loans [Member]

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

Loans and Leases Receivable, Gross, Carrying Amount

2,455,125

2,336,039

Special Mention [Member] | Noncovered Loans [Member]

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

Loans and Leases Receivable, Gross, Carrying Amount

38,482

37,758

Substandard [Member] | Noncovered Loans [Member]

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

Loans and Leases Receivable, Gross, Carrying Amount

127,604

151,913

Doubtful [Member] | Noncovered Loans [Member]

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

Loans and Leases Receivable, Gross, Carrying Amount

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

1,157,218

1,106,551

Loans and Leases Receivable, Allowance

26,871

27,270

25,542

24,745

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

44,315

45,343

Loans and Leases Receivable, Allowance

750

753

786

689

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

1,062,881

1,011,722

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

44,087

44,788

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

31,333

29,222

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

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

63,004

65,607

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

158

529

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

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

43,924

44,192

Loans and Leases Receivable, Allowance

657

694

689

654

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

48,138

47,327

Loans and Leases Receivable, Allowance

433

460

693

488

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

655,722

614,812

Loans and Leases Receivable, Allowance

9,411

11,033

10,249

9,551

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

399,774

395,173

Loans and Leases Receivable, Allowance

5,458

6,362

8,555

9,606

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

40,866

40,346

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

44,229

43,401

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

625,209

581,671

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

376,995

357,063

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

252

406

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

115

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

1,918

3,688

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

2,758

1,848

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

2,806

3,440

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

3,794

3,926

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

28,595

29,453

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

20,021

36,262

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

24,479

28,342

Loans and Leases Receivable, Allowance

382

316

223

665

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

42,192

36,211

Loans and Leases Receivable, Allowance

108

102

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

21,494

18,496

Loans and Leases Receivable, Allowance

990

1,171

1,671

2,331

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

31,156

31,664

Loans and Leases Receivable, Allowance

538

635

1,002

864

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

24,479

28,342

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

42,192

36,211

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

16,372

12,741

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

29,858

28,705

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

1,219

1,351

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

788

1,142

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

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

3,903

4,404

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

510

1,817

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

152,800

157,599

Loans and Leases Receivable, Allowance

2,364

2,437

2,129

2,719