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Allowance for Losses on Loans (Tables) | 12 Months Ended
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Sep. 30, 2016
Receivables [Abstract] |
Summary of activity in allowance for loan losses | The following tables summarize the activity in the allowance for loan losses.
Twelve Months Ended September 30, 2016 | Beginning Allowance |  | Charge-offs |  | Recoveries |  | Provision & Transfers |  | Ending Allowance
| (In thousands)
Single-family residential | $ | 47,347 |  |  | $ | (3,106 | ) |  | $ | 3,251 |  |  | $ | (9,696 | ) |  | $ | 37,796 |
Construction | 6,680 |  |  | — |  |  | 745 |  |  | 12,413 |  |  | 19,838 |
Construction - custom | 990 |  |  | (60 | ) |  | 60 |  |  | 90 |  |  | 1,080 |
Land - acquisition & development | 5,781 |  |  | (42 | ) |  | 8,220 |  |  | (7,936 | ) |  | 6,023 |
Land - consumer lot loans | 2,946 |  |  | (732 | ) |  | 5 |  |  | 316 |  |  | 2,535 |
Multi-family | 5,304 |  |  | — |  |  | — |  |  | 1,621 |  |  | 6,925 |
Commercial real estate | 8,960 |  |  | (103 | ) |  | 1,812 |  |  | (2,081 | ) |  | 8,588 |
Commercial & industrial | 24,980 |  |  | (941 | ) |  | 2,933 |  |  | 1,036 |  |  | 28,008 |
HELOC | 902 |  |  | (54 | ) |  | 21 |  |  | (56 | ) |  | 813 |
Consumer | 2,939 |  |  | (962 | ) |  | 2,018 |  |  | (2,107 | ) |  | 1,888 |
| $ | 106,829 |  |  | $ | (6,000 | ) |  | $ | 19,065 |  |  | $ | (6,400 | ) |  | $ | 113,494 |
Twelve Months Ended September 30, 2015 | Beginning Allowance |  | Charge-offs |  | Recoveries |  | Provision & Transfers |  | Ending Allowance
| (In thousands)
Single-family residential | $ | 62,763 |  |  | $ | (5,524 | ) |  | $ | 13,403 |  |  | $ | (23,295 | ) |  | $ | 47,347 |
Construction | 6,742 |  |  | (388 | ) |  | 120 |  |  | 206 |  |  | 6,680 |
Construction - custom | 1,695 |  |  | — |  |  | — |  |  | (705 | ) |  | 990 |
Land - acquisition & development | 5,592 |  |  | (38 | ) |  | 207 |  |  | 20 |  |  | 5,781 |
Land - consumer lot loans | 3,077 |  |  | (459 | ) |  | 221 |  |  | 107 |  |  | 2,946 |
Multi-family | 4,248 |  |  | — |  |  | 220 |  |  | 836 |  |  | 5,304 |
Commercial real estate | 7,548 |  |  | (1,711 | ) |  | 735 |  |  | 2,388 |  |  | 8,960 |
Commercial & industrial | 16,527 |  |  | (3,354 | ) |  | 1,374 |  |  | 10,433 |  |  | 24,980 |
HELOC | 928 |  |  | (66 | ) |  | 2 |  |  | 38 |  |  | 902 |
Consumer | 3,227 |  |  | (3,060 | ) |  | 3,688 |  |  | (916 | ) |  | 2,939 |
Covered loans | 2,244 |  |  | — |  |  | — |  |  | (2,244 | ) |  | — |
| $ | 114,591 |  |  | $ | (14,600 | ) |  | $ | 19,970 |  |  | $ | (13,132 | ) |  | $ | 106,829 |
Summary of loans collectively and individually evaluated for impairment and related allocation of reserves | The following tables show a summary of loans collectively and individually evaluated for impairment and the related allocation of general and specific reserves.
September 30, 2016 | Loans Collectively Evaluated for Impairment |  | Loans Individually Evaluated for Impairment
| General Reserve Allocation |  | Gross Loans Subject to General Reserve (1) |  | Ratio |  | Specific Reserve Allocation |  | Gross Loans Subject to Specific Reserve (1) |  | Ratio
| (In thousands) |  |  |  | (In thousands)
Single-family residential | $ | 37,536 |  |  | $ | 5,585,912 |  |  | 0.7 | % |  | $ | 260 |  |  | $ | 19,629 |  |  | 1.3 | %
Construction | 19,838 |  |  | 498,450 |  |  | 4.0 |  |  | — |  |  | — |  |  | — |
Construction - custom | 1,080 |  |  | 229,298 |  |  | 0.5 |  |  | — |  |  | 330 |  |  | — |
Land - acquisition & development | 6,022 |  |  | 90,850 |  |  | 6.6 |  |  | 2 |  |  | 850 |  |  | 0.2 |
Land - consumer lot loans | 2,535 |  |  | 92,828 |  |  | 2.7 |  |  | — |  |  | 558 |  |  | — |
Multi-family | 6,911 |  |  | 1,091,974 |  |  | 0.6 |  |  | 13 |  |  | 1,505 |  |  | 0.9 |
Commercial real estate | 8,497 |  |  | 957,380 |  |  | 0.9 |  |  | 91 |  |  | 11,157 |  |  | 0.8 |
Commercial & industrial | 28,008 |  |  | 966,930 |  |  | 2.9 |  |  | — |  |  | — |  |  | — |
HELOC | 813 |  |  | 133,203 |  |  | 0.6 |  |  | — |  |  | 239 |  |  | — |
Consumer | 1,888 |  |  | 137,315 |  |  | 1.4 |  |  | — |  |  | 3 |  |  | — |
| $ | 113,128 |  |  | $ | 9,784,140 |  |  | 1.2 | % |  | $ | 366 |  |  | $ | 34,271 |  |  | 1.1 | %
___________________
(1) | Excludes acquired loans with discounts sufficient to absorb potential losses and covered loans
September 30, 2015 | Loans Collectively Evaluated for Impairment |  | Loans Individually Evaluated for Impairment
| General Reserve Allocation |  | Gross Loans Subject to General Reserve (1) |  | Ratio |  | Specific Reserve Allocation |  | Gross Loans Subject to Specific Reserve (1) |  | Ratio
| (In thousands) |  |  |  | (In thousands)
Single-family residential | $ | 47,073 |  |  | $ | 5,595,752 |  |  | 0.8 | % |  | $ | 275 |  |  | $ | 51,718 |  |  | 0.5 | %
Construction | 6,680 |  |  | 124,679 |  |  | 5.4 |  |  | — |  |  | 5,441 |  |  | — |
Construction - custom | 990 |  |  | 205,692 |  |  | 0.5 |  |  | — |  |  | — |  |  | — |
Land - acquisition & development | 5,781 |  |  | 72,602 |  |  | 8.0 |  |  | — |  |  | 2,198 |  |  | — |
Land - consumer lot loans | 2,946 |  |  | 93,103 |  |  | 3.2 |  |  | — |  |  | 10,824 |  |  | — |
Multi-family | 5,304 |  |  | 1,062,194 |  |  | 0.5 |  |  | — |  |  | 5,348 |  |  | — |
Commercial real estate | 8,960 |  |  | 844,691 |  |  | 1.1 |  |  | — |  |  | 8,826 |  |  | — |
Commercial & industrial | 24,980 |  |  | 643,577 |  |  | 3.9 |  |  | — |  |  | — |  |  | — |
HELOC | 902 |  |  | 126,594 |  |  | 0.7 |  |  | — |  |  | 1,072 |  |  | — |
Consumer | 2,938 |  |  | 194,569 |  |  | 1.5 |  |  | — |  |  | 86 |  |  | — |
| $ | 106,554 |  |  | $ | 8,963,453 |  |  | 1.2 | % |  | $ | 275 |  |  | $ | 85,513 |  |  | 0.3 | %
___________________
(1) | Excludes acquired loans with discounts sufficient to absorb potential losses and covered loans
Summary of loans based on credit quality indicators | The following tables provide information on loans based on credit quality indicators (defined above).
September 30, 2016 | Internally Assigned Grade |  | Total
| Pass |  | Special mention |  | Substandard |  | Doubtful |  | Loss |  | Gross Loans
| (In thousands)
Non-acquired loans |  |  |  |  |  |  |  |  |  |  |
Single-family residential | $ | 5,570,634 |  |  | $ | — |  |  | $ | 50,432 |  |  | $ | — |  |  | $ | — |  |  | $ | 5,621,066 |
Construction | 1,098,549 |  |  | 8,595 |  |  | 3,267 |  |  | — |  |  | — |  |  | 1,110,411 |
Construction - custom | 473,069 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 473,069 |
Land - acquisition & development | 110,125 |  |  | — |  |  | 6,031 |  |  | — |  |  | — |  |  | 116,156 |
Land - consumer lot loans | 100,862 |  |  | — |  |  | 991 |  |  | — |  |  | — |  |  | 101,853 |
Multi-family | 1,112,342 |  |  | 3,237 |  |  | 3,222 |  |  | — |  |  | — |  |  | 1,118,801 |
Commercial real estate | 928,032 |  |  | 13,446 |  |  | 14,686 |  |  | — |  |  | — |  |  | 956,164 |
Commercial & industrial | 900,571 |  |  | 7,160 |  |  | 38,917 |  |  | — |  |  | — |  |  | 946,648 |
HELOC | 134,298 |  |  | — |  |  | 487 |  |  | — |  |  | — |  |  | 134,785 |
Consumer | 137,367 |  |  | — |  |  | 83 |  |  | — |  |  | — |  |  | 137,450 |
Total non-acquired loans | 10,565,849 |  |  | 32,438 |  |  | 118,116 |  |  | — |  |  | — |  |  | 10,716,403 |
Acquired loans | 108,616 |  |  | 47 |  |  | 6,731 |  |  | — |  |  | — |  |  | 115,394 |
Credit impaired acquired loans | 60,985 |  |  | — |  |  | 28,852 |  |  | — |  |  | — |  |  | 89,837 |
Covered loans | 28,647 |  |  | — |  |  | 327 |  |  | — |  |  | — |  |  | 28,974 |
Total gross loans | $ | 10,764,097 |  |  | $ | 32,485 |  |  | $ | 154,026 |  |  | $ | — |  |  | $ | — |  |  | $ | 10,950,608 |
Total grade as a % of total gross loans | 98.3 | % |  | 0.3 | % |  | 1.4 | % |  | — | % |  | — | % |  |
September 30, 2015 | Internally Assigned Grade |  | Total
| Pass |  | Special mention |  | Substandard |  | Doubtful |  | Loss |  | Gross Loans
| (In thousands)
Non-acquired loans |  |  |  |  |  |  |  |  |  |  |
Single-family residential | $ | 5,558,700 |  |  | $ | — |  |  | $ | 93,145 |  |  | $ | — |  |  | $ | — |  |  | $ | 5,651,845 |
Construction | 197,935 |  |  | — |  |  | 2,574 |  |  | — |  |  | — |  |  | 200,509 |
Construction - custom | 396,307 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 396,307 |
Land - acquisition & development | 89,656 |  |  | — |  |  | 4,552 |  |  | — |  |  | — |  |  | 94,208 |
Land - consumer lot loans | 103,569 |  |  | — |  |  | 420 |  |  | — |  |  | — |  |  | 103,989 |
Multi-family | 1,118,673 |  |  | 865 |  |  | 6,184 |  |  | — |  |  | — |  |  | 1,125,722 |
Commercial real estate | 971,510 |  |  | 4,360 |  |  | 10,400 |  |  | — |  |  | — |  |  | 986,270 |
Commercial & industrial | 575,034 |  |  | 1,496 |  |  | 36,306 |  |  | — |  |  | — |  |  | 612,836 |
HELOC | 127,398 |  |  | — |  |  | 248 |  |  | — |  |  | — |  |  | 127,646 |
Consumer | 194,451 |  |  | — |  |  | 204 |  |  | — |  |  | — |  |  | 194,655 |
Total non-acquired loans | 9,333,233 |  |  | 6,721 |  |  | 154,033 |  |  | — |  |  | — |  |  | 9,493,987 |
Acquired loans | 149,891 |  |  | — |  |  | 16,402 |  |  | — |  |  | — |  |  | 166,293 |
Credit impaired acquired loans | 61,019 |  |  | — |  |  | 26,062 |  |  | — |  |  | — |  |  | 87,081 |
Covered loans | 61,776 |  |  | — |  |  | 14,133 |  |  | — |  |  | — |  |  | 75,909 |
Total gross loans | $ | 9,605,919 |  |  | $ | 6,721 |  |  | $ | 210,630 |  |  | $ | — |  |  | $ | — |  |  | $ | 9,823,270 |
Total grade as a % of total gross loans | 97.8 | % |  | 0.1 | % |  | 2.1 | % |  | — | % |  | — | % |  |
Schedule of credit risk profile by payment activity | The following tables provide information on loans based on payment activity.
September 30, 2016 | Performing Loans |  | Non-Performing Loans
| Amount |  | % of Total Gross Loans |  | Amount |  | % of Total Gross Loans
| (In thousands) |  | (In thousands)
Single-family residential | $ | 5,587,919 |  |  | 99.4 | % |  | $ | 33,148 |  |  | 0.6 | %
Construction | 1,110,411 |  |  | 100.0 |  |  | — |  |  | — |
Construction - custom | 473,069 |  |  | 100.0 |  |  | — |  |  | — |
Land - acquisition & development | 116,097 |  |  | 99.9 |  |  | 58 |  |  | 0.1 |
Land - consumer lot loans | 101,343 |  |  | 99.5 |  |  | 510 |  |  | 0.5 |
Multi-family | 1,118,025 |  |  | 99.9 |  |  | 776 |  |  | 0.1 |
Commercial real estate | 949,064 |  |  | 99.3 |  |  | 7,100 |  |  | 0.7 |
Commercial & industrial | 946,065 |  |  | 99.9 |  |  | 583 |  |  | 0.1 |
HELOC | 134,546 |  |  | 99.8 |  |  | 239 |  |  | 0.2 |
Consumer | 137,450 |  |  | 100.0 |  |  | — |  |  | — |
| $ | 10,673,989 |  |  | 99.6 | % |  | $ | 42,414 |  |  | 0.4 | %
September 30, 2015 | Performing Loans |  | Non-Performing Loans
| Amount |  | % of Total Gross Loans |  | Amount |  | % of Total Gross Loans
| (In thousands) |  | (In thousands)
Single-family residential | $ | 5,592,771 |  |  | 99.0 | % |  | $ | 59,074 |  |  | 1.0 | %
Construction | 199,755 |  |  | 99.6 |  |  | 754 |  |  | 0.4 |
Construction - custom | 395,575 |  |  | 99.8 |  |  | 732 |  |  | 0.2 |
Land - acquisition & development | 94,208 |  |  | 100.0 |  |  | — |  |  | — |
Land - consumer lot loans | 102,716 |  |  | 98.8 |  |  | 1,273 |  |  | 1.2 |
Multi-family | 1,123,165 |  |  | 99.8 |  |  | 2,558 |  |  | 0.2 |
Commercial real estate | 984,093 |  |  | 99.8 |  |  | 2,176 |  |  | 0.2 |
Commercial & industrial | 612,836 |  |  | 100.0 |  |  | — |  |  | — |
HELOC | 127,083 |  |  | 99.6 |  |  | 563 |  |  | 0.4 |
Consumer | 193,975 |  |  | 99.7 |  |  | 680 |  |  | 0.3 |
| $ | 9,426,177 |  |  | 99.3 | % |  | $ | 67,810 |  |  | 0.7 | %
Summary of impaired loans based on type | The following tables provide information on impaired loans by loan category.
September 30, 2016 | Recorded Investment |  | Unpaid Principal Balance |  | Related Allowance |  | Average Recorded Investment
| (In thousands)
Impaired loans with no related allowance recorded: |  |  |  |  |  |  |
Single-family residential | $ | 9,627 |  |  | $ | 11,366 |  |  | $ | — |  |  | $ | 6,511 |
Construction | — |  |  | — |  |  | — |  |  | — |
Construction - custom | — |  |  | — |  |  | — |  |  | — |
Land - acquisition & development | 138 |  |  | 9,001 |  |  | — |  |  | 614 |
Land - consumer lot loans | 499 |  |  | 609 |  |  | — |  |  | 317 |
Multi-family | 394 |  |  | 3,972 |  |  | — |  |  | 638 |
Commercial real estate | 11,741 |  |  | 21,301 |  |  | — |  |  | 6,260 |
Commercial & industrial | 1,030 |  |  | 3,082 |  |  | — |  |  | 863 |
HELOC | 209 |  |  | 315 |  |  | — |  |  | 165 |
Consumer | 74 |  |  | 550 |  |  | — |  |  | 111 |
| 23,712 |  |  | 50,196 |  |  | — |  |  | 15,479 |
Impaired loans with an allowance recorded: |  |  |  |  |  |  |
Single-family residential | 228,186 |  |  | 232,595 |  |  | 3,809 |  |  | 216,632 |
Construction | — |  |  | — |  |  | — |  |  | — |
Construction - custom | — |  |  | — |  |  | — |  |  | — |
Land - acquisition & development | 1,154 |  |  | 2,094 |  |  | 1 |  |  | 1,766 |
Land - consumer lot loans | 9,630 |  |  | 10,678 |  |  | 1 |  |  | 9,548 |
Multi-family | 1,505 |  |  | 1,505 |  |  | 13 |  |  | 1,522 |
Commercial real estate | 19,434 |  |  | 22,848 |  |  | 91 |  |  | 19,311 |
Commercial & industrial | — |  |  | — |  |  | — |  |  | — |
HELOC | 1,506 |  |  | 1,521 |  |  | — |  |  | 1,413 |
Consumer | 116 |  |  | 306 |  |  | — |  |  | 100 |
| 261,531 |  |  | 271,547 |  |  | 3,915 |  | (1) | 250,292 |
Total: |  |  |  |  |  |  |
Single-family residential | 237,813 |  |  | 243,961 |  |  | 3,809 |  |  | 223,143 |
Construction | — |  |  | — |  |  | — |  |  | — |
Construction - custom | — |  |  | — |  |  | — |  |  | — |
Land - acquisition & development | 1,292 |  |  | 11,095 |  |  | 1 |  |  | 2,380 |
Land - consumer lot loans | 10,129 |  |  | 11,287 |  |  | 1 |  |  | 9,865 |
Multi-family | 1,899 |  |  | 5,477 |  |  | 13 |  |  | 2,160 |
Commercial real estate | 31,175 |  |  | 44,149 |  |  | 91 |  |  | 25,571 |
Commercial & industrial | 1,030 |  |  | 3,082 |  |  | — |  |  | 863 |
HELOC | 1,715 |  |  | 1,836 |  |  | — |  |  | 1,578 |
Consumer | 190 |  |  | 856 |  |  | — |  |  | 211 |
| $ | 285,243 |  |  | $ | 321,743 |  |  | $ | 3,915 |  | (1) | $ | 265,771 |
____________________
(1) | Includes $366,000 of specific reserves and $3,549,000 included in the general reserves.
September 30, 2015 | Recorded Investment |  | Unpaid Principal Balance |  | Related Allowance |  | Average Recorded Investment
| (In thousands)
Impaired loans with no related allowance recorded: |  |  |  |  |  |  |
Single-family residential | $ | 17,250 |  |  | $ | 19,644 |  |  | $ | — |  |  | $ | 14,069 |
Construction | 453 |  |  | 2,151 |  |  | — |  |  | 471 |
Construction - custom | 554 |  |  | 554 |  |  | — |  |  | 182 |
Land - acquisition & development | 2,570 |  |  | 9,426 |  |  | — |  |  | 926 |
Land - consumer lot loans | 727 |  |  | 814 |  |  | — |  |  | 544 |
Multi-family | 3,770 |  |  | 7,054 |  |  | — |  |  | 1,545 |
Commercial real estate | 9,427 |  |  | 15,620 |  |  | — |  |  | 8,130 |
Commercial & industrial | 2,955 |  |  | 13,066 |  |  | — |  |  | 2,681 |
HELOC | 683 |  |  | 1,532 |  |  | — |  |  | 536 |
Consumer | 477 |  |  | 703 |  |  | — |  |  | 390 |
| 38,866 |  |  | 70,564 |  |  | — |  |  | 29,474 |
Impaired loans with an allowance recorded: |  |  |  |  |  |  |
Single-family residential | 259,461 |  |  | 263,268 |  |  | 6,678 |  |  | 260,028 |
Construction | 4,988 |  |  | 5,778 |  |  | — |  |  | 5,432 |
Construction - custom | — |  |  | — |  |  | — |  |  | — |
Land - acquisition & development | 2,486 |  |  | 3,426 |  |  | — |  |  | 3,478 |
Land - consumer lot loans | 11,289 |  |  | 11,554 |  |  | — |  |  | 11,324 |
Multi-family | 3,823 |  |  | 3,823 |  |  | — |  |  | 3,732 |
Commercial real estate | 19,124 |  |  | 21,078 |  |  | — |  |  | 18,886 |
Commercial & industrial | — |  |  | — |  |  | — |  |  | — |
HELOC | 1,443 |  |  | 1,443 |  |  | — |  |  | 1,359 |
Consumer | 99 |  |  | 289 |  |  | — |  |  | 102 |
| 302,713 |  |  | 310,659 |  |  | 6,678 |  | (1) | 304,341 |
Total: |  |  |  |  |  |  |
Single-family residential | 276,711 |  |  | 282,912 |  |  | 6,678 |  |  | 274,097 |
Construction | 5,441 |  |  | 7,929 |  |  | — |  |  | 5,903 |
Construction - custom | 554 |  |  | 554 |  |  | — |  |  | 182 |
Land - acquisition & development | 5,056 |  |  | 12,852 |  |  | — |  |  | 4,404 |
Land - consumer lot loans | 12,016 |  |  | 12,368 |  |  | — |  |  | 11,868 |
Multi-family | 7,593 |  |  | 10,877 |  |  | — |  |  | 5,277 |
Commercial real estate | 28,551 |  |  | 36,698 |  |  | — |  |  | 27,016 |
Commercial & industrial | 2,955 |  |  | 13,066 |  |  | — |  |  | 2,681 |
HELOC | 2,126 |  |  | 2,975 |  |  | — |  |  | 1,895 |
Consumer | 576 |  |  | 992 |  |  | — |  |  | 492 |
| $ | 341,579 |  |  | $ | 381,223 |  |  | $ | 6,678 |  | (1) | $ | 333,815 |
____________________
(1) | Includes $275,000 of specific reserves and $6,403,000 included in the general reserves.

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- Definition Tabular disclosure of financing receivables (examples of financing receivables include loans, trade accounts receivable and notes receivable) and activity in the allowance for credit losses account. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 + Details
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- Definition Tabular disclosure of financing receivables by credit quality indicator. The credit quality indicator is a statistic about the credit quality of financing receivables. Examples include, but not limited to, consumer credit risk scores, credit-rating-agency ratings, an entity's internal credit risk grades, loan-to-value ratios, collateral, collection experience and other internal metrics. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 55 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=32702940&loc=SL6953803-111525 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 29 -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953659-111524 + Details
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- Definition Tabular disclosure of impaired financing receivables. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524 + Details
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- References No definition available. + Details
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