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Allowance for Losses on Loans - Internally Assigned Grade (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Sep. 30, 2012
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross $ 7,990,545 $ 7,866,336
Single-family residential
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 5,373,950 5,779,264
Construction - speculative
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 130,778 131,526
Construction - custom
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 302,722 211,690
Land - acquisition & development
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 81,660 128,379
Land - consumer lot loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 124,984 141,844
Multi-family
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 835,598 710,741
Commercial real estate
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 625,293 406,364
Commercial & industrial
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 326,450 166,115
HELOC
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 133,631 126,942
Consumer
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 55,479 63,471
Non-acquired loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 7,641,266 7,755,219
Non-acquired loans | Single-family residential
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 5,359,149 5,778,922
Non-acquired loans | Construction - speculative
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 130,778 129,637
Non-acquired loans | Construction - custom
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 302,722 211,690
Non-acquired loans | Land - acquisition & development
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 77,775 124,677
Non-acquired loans | Land - consumer lot loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 121,671 141,844
Non-acquired loans | Multi-family
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 831,684 710,140
Non-acquired loans | Commercial real estate
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 414,961 319,210
Non-acquired loans | Commercial & industrial
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 243,199 162,823
Non-acquired loans | HELOC
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 112,186 112,902
Non-acquired loans | Consumer
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 47,141 63,374
Acquired loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 250,379 0
Acquired loans | Single-family residential
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 14,468 0
Acquired loans | Construction - speculative
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Acquired loans | Construction - custom
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Acquired loans | Land - acquisition & development
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 1,489 0
Acquired loans | Land - consumer lot loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 3,313 0
Acquired loans | Multi-family
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 3,914 0
Acquired loans | Commercial real estate
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 133,423 0
Acquired loans | Commercial & industrial
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 75,326 0
Acquired loans | HELOC
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 10,179 0
Acquired loans | Consumer
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 8,267 0
Credit-impaired acquired loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 98,900 111,117
Credit-impaired acquired loans | Single-family residential
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 333 342
Credit-impaired acquired loans | Construction - speculative
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 1,889
Credit-impaired acquired loans | Construction - custom
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Credit-impaired acquired loans | Land - acquisition & development
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 2,396 3,702
Credit-impaired acquired loans | Land - consumer lot loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Credit-impaired acquired loans | Multi-family
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 601
Credit-impaired acquired loans | Commercial real estate
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 76,909 87,154
Credit-impaired acquired loans | Commercial & industrial
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 7,925 3,292
Credit-impaired acquired loans | HELOC
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 11,266 14,040
Credit-impaired acquired loans | Consumer
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 71 97
Credit-impaired acquired loans | Pool 1 - Construction and land A&D
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 2,396 5,591
Credit-impaired acquired loans | Pool 2 - Single-family residential
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 333 342
Credit-impaired acquired loans | Pool 3 - Multi-family
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 601
Credit-impaired acquired loans | Pool 4 - HELOC & other consumer
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 11,337 14,137
Credit-impaired acquired loans | Pool 5 - Commercial real estate
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 76,909 87,154
Credit-impaired acquired loans | Pool 6 - Commercial & industrial
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 7,925 3,292
Pass
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 7,639,717 7,468,534
Grade as percentage of total gross assets 95.60% 94.90%
Pass | Non-acquired loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 7,363,923 7,396,340
Pass | Non-acquired loans | Single-family residential
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 5,184,101 5,588,252
Pass | Non-acquired loans | Construction - speculative
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 99,436 86,126
Pass | Non-acquired loans | Construction - custom
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 302,722 211,690
Pass | Non-acquired loans | Land - acquisition & development
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 64,355 73,661
Pass | Non-acquired loans | Land - consumer lot loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 121,039 140,006
Pass | Non-acquired loans | Multi-family
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 819,911 684,649
Pass | Non-acquired loans | Commercial real estate
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 373,012 278,022
Pass | Non-acquired loans | Commercial & industrial
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 240,441 158,421
Pass | Non-acquired loans | HELOC
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 112,186 112,902
Pass | Non-acquired loans | Consumer
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 46,720 62,611
Pass | Acquired loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 209,754 0
Pass | Acquired loans | Single-family residential
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 14,468 0
Pass | Acquired loans | Construction - speculative
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Pass | Acquired loans | Construction - custom
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Pass | Acquired loans | Land - acquisition & development
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 312 0
Pass | Acquired loans | Land - consumer lot loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 3,313 0
Pass | Acquired loans | Multi-family
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 3,227 0
Pass | Acquired loans | Commercial real estate
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 105,055 0
Pass | Acquired loans | Commercial & industrial
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 64,933 0
Pass | Acquired loans | HELOC
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 10,179 0
Pass | Acquired loans | Consumer
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 8,267 0
Pass | Credit-impaired acquired loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 66,040 72,194
Pass | Credit-impaired acquired loans | Pool 1 - Construction and land A&D
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 980 2,466
Pass | Credit-impaired acquired loans | Pool 2 - Single-family residential
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 333 342
Pass | Credit-impaired acquired loans | Pool 3 - Multi-family
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Pass | Credit-impaired acquired loans | Pool 4 - HELOC & other consumer
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 11,337 14,137
Pass | Credit-impaired acquired loans | Pool 5 - Commercial real estate
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 52,509 53,683
Pass | Credit-impaired acquired loans | Pool 6 - Commercial & industrial
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 881 1,566
Special mention
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 42,499 42,988
Grade as percentage of total gross assets 0.50% 0.60%
Special mention | Non-acquired loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 33,384 38,622
Special mention | Non-acquired loans | Single-family residential
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 4,595 844
Special mention | Non-acquired loans | Construction - speculative
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 3,199 10,113
Special mention | Non-acquired loans | Construction - custom
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Special mention | Non-acquired loans | Land - acquisition & development
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 775 4,637
Special mention | Non-acquired loans | Land - consumer lot loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 223
Special mention | Non-acquired loans | Multi-family
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 2,114 5,098
Special mention | Non-acquired loans | Commercial real estate
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 21,652 16,282
Special mention | Non-acquired loans | Commercial & industrial
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 1,049 1,071
Special mention | Non-acquired loans | HELOC
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Special mention | Non-acquired loans | Consumer
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 354
Special mention | Acquired loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 5,499 0
Special mention | Acquired loans | Single-family residential
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Special mention | Acquired loans | Construction - speculative
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Special mention | Acquired loans | Construction - custom
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Special mention | Acquired loans | Land - acquisition & development
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Special mention | Acquired loans | Land - consumer lot loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Special mention | Acquired loans | Multi-family
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Special mention | Acquired loans | Commercial real estate
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 4,190 0
Special mention | Acquired loans | Commercial & industrial
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 1,309 0
Special mention | Acquired loans | HELOC
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Special mention | Acquired loans | Consumer
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Special mention | Credit-impaired acquired loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 3,616 4,366
Special mention | Credit-impaired acquired loans | Pool 1 - Construction and land A&D
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 461 0
Special mention | Credit-impaired acquired loans | Pool 2 - Single-family residential
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Special mention | Credit-impaired acquired loans | Pool 3 - Multi-family
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Special mention | Credit-impaired acquired loans | Pool 4 - HELOC & other consumer
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Special mention | Credit-impaired acquired loans | Pool 5 - Commercial real estate
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 3,155 4,308
Special mention | Credit-impaired acquired loans | Pool 6 - Commercial & industrial
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 58
Substandard
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 308,329 352,916
Grade as percentage of total gross assets 3.90% 4.50%
Substandard | Non-acquired loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 243,959 320,257
Substandard | Non-acquired loans | Single-family residential
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 170,453 189,826
Substandard | Non-acquired loans | Construction - speculative
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 28,143 33,398
Substandard | Non-acquired loans | Construction - custom
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Substandard | Non-acquired loans | Land - acquisition & development
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 12,645 46,379
Substandard | Non-acquired loans | Land - consumer lot loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 632 1,615
Substandard | Non-acquired loans | Multi-family
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 9,659 20,393
Substandard | Non-acquired loans | Commercial real estate
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 20,297 24,906
Substandard | Non-acquired loans | Commercial & industrial
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 1,709 3,331
Substandard | Non-acquired loans | HELOC
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Substandard | Non-acquired loans | Consumer
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 421 409
Substandard | Acquired loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 35,126 0
Substandard | Acquired loans | Single-family residential
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Substandard | Acquired loans | Construction - speculative
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Substandard | Acquired loans | Construction - custom
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Substandard | Acquired loans | Land - acquisition & development
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 1,177 0
Substandard | Acquired loans | Land - consumer lot loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Substandard | Acquired loans | Multi-family
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 687 0
Substandard | Acquired loans | Commercial real estate
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 24,178 0
Substandard | Acquired loans | Commercial & industrial
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 9,084 0
Substandard | Acquired loans | HELOC
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Substandard | Acquired loans | Consumer
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Substandard | Credit-impaired acquired loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 29,244 32,659
Substandard | Credit-impaired acquired loans | Pool 1 - Construction and land A&D
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 955 3,125
Substandard | Credit-impaired acquired loans | Pool 2 - Single-family residential
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Substandard | Credit-impaired acquired loans | Pool 3 - Multi-family
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 601
Substandard | Credit-impaired acquired loans | Pool 4 - HELOC & other consumer
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Substandard | Credit-impaired acquired loans | Pool 5 - Commercial real estate
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 21,245 28,200
Substandard | Credit-impaired acquired loans | Pool 6 - Commercial & industrial
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 7,044 733
Doubtful
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 1,898
Grade as percentage of total gross assets 0.00% 0.00%
Doubtful | Non-acquired loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Non-acquired loans | Single-family residential
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Non-acquired loans | Construction - speculative
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Non-acquired loans | Construction - custom
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Non-acquired loans | Land - acquisition & development
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Non-acquired loans | Land - consumer lot loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Non-acquired loans | Multi-family
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Non-acquired loans | Commercial real estate
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Non-acquired loans | Commercial & industrial
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Non-acquired loans | HELOC
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Non-acquired loans | Consumer
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Acquired loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Acquired loans | Single-family residential
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Acquired loans | Construction - speculative
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Acquired loans | Construction - custom
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Acquired loans | Land - acquisition & development
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Acquired loans | Land - consumer lot loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Acquired loans | Multi-family
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Acquired loans | Commercial real estate
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Acquired loans | Commercial & industrial
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Acquired loans | HELOC
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Acquired loans | Consumer
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Credit-impaired acquired loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 1,898
Doubtful | Credit-impaired acquired loans | Pool 1 - Construction and land A&D
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Credit-impaired acquired loans | Pool 2 - Single-family residential
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Credit-impaired acquired loans | Pool 3 - Multi-family
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Credit-impaired acquired loans | Pool 4 - HELOC & other consumer
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Doubtful | Credit-impaired acquired loans | Pool 5 - Commercial real estate
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 963
Doubtful | Credit-impaired acquired loans | Pool 6 - Commercial & industrial
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 935
Loss
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Grade as percentage of total gross assets 0.00% 0.00%
Loss | Non-acquired loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Non-acquired loans | Single-family residential
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Non-acquired loans | Construction - speculative
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Non-acquired loans | Construction - custom
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Non-acquired loans | Land - acquisition & development
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Non-acquired loans | Land - consumer lot loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Non-acquired loans | Multi-family
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Non-acquired loans | Commercial real estate
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Non-acquired loans | Commercial & industrial
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Non-acquired loans | HELOC
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Non-acquired loans | Consumer
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Acquired loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Acquired loans | Single-family residential
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Acquired loans | Construction - speculative
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Acquired loans | Construction - custom
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Acquired loans | Land - acquisition & development
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Acquired loans | Land - consumer lot loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Acquired loans | Multi-family
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Acquired loans | Commercial real estate
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Acquired loans | Commercial & industrial
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Acquired loans | HELOC
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Acquired loans | Consumer
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Credit-impaired acquired loans
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Credit-impaired acquired loans | Pool 1 - Construction and land A&D
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Credit-impaired acquired loans | Pool 2 - Single-family residential
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Credit-impaired acquired loans | Pool 3 - Multi-family
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Credit-impaired acquired loans | Pool 4 - HELOC & other consumer
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Credit-impaired acquired loans | Pool 5 - Commercial real estate
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross 0 0
Loss | Credit-impaired acquired loans | Pool 6 - Commercial & industrial
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable, gross $ 0 $ 0