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Allowance for Losses on Loans (Tables) | 12 Months Ended
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Sep. 30, 2018
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, 2018 | Beginning Allowance |  | Charge-offs |  | Recoveries |  | Provision & Transfers |  | Ending Allowance
| (In thousands)
Single-family residential | $ | 36,892 |  |  | $ | (1,142 | ) |  | $ | 757 |  |  | $ | (3,474 | ) |  | $ | 33,033 |
Construction | 24,556 |  |  | — |  |  | — |  |  | 6,761 |  |  | 31,317 |
Construction - custom | 1,944 |  |  | (50 | ) |  | — |  |  | (52 | ) |  | 1,842 |
Land - acquisition & development | 6,829 |  |  | (13 | ) |  | 14,223 |  |  | (13,061 | ) |  | 7,978 |
Land - consumer lot loans | 2,649 |  |  | (67 | ) |  | 35 |  |  | (453 | ) |  | 2,164 |
Multi-family | 7,862 |  |  | — |  |  | — |  |  | 467 |  |  | 8,329 |
Commercial real estate | 11,818 |  |  | (36 | ) |  | 189 |  |  | (119 | ) |  | 11,852 |
Commercial & industrial | 28,524 |  |  | (3,574 | ) |  | 714 |  |  | 3,038 |  |  | 28,702 |
HELOC | 855 |  |  | (668 | ) |  | 71 |  |  | 523 |  |  | 781 |
Consumer | 1,144 |  |  | (382 | ) |  | 993 |  |  | 1,504 |  |  | 3,259 |
| $ | 123,073 |  |  | $ | (5,932 | ) |  | $ | 16,982 |  |  | $ | (4,866 | ) |  | $ | 129,257 |
Twelve Months Ended September 30, 2017 | Beginning Allowance |  | Charge-offs |  | Recoveries |  | Provision & Transfers |  | Ending Allowance
| (In thousands)
Single-family residential | $ | 37,796 |  |  | $ | (1,229 | ) |  | $ | 653 |  |  | $ | (328 | ) |  | $ | 36,892 |
Construction | 19,838 |  |  | — |  |  | — |  |  | 4,718 |  |  | 24,556 |
Construction - custom | 1,080 |  |  | (16 | ) |  | — |  |  | 880 |  |  | 1,944 |
Land - acquisition & development | 6,023 |  |  | (280 | ) |  | 11,038 |  |  | (9,952 | ) |  | 6,829 |
Land - consumer lot loans | 2,535 |  |  | (17 | ) |  | 481 |  |  | (350 | ) |  | 2,649 |
Multi-family | 6,925 |  |  | — |  |  | — |  |  | 937 |  |  | 7,862 |
Commercial real estate | 8,588 |  |  | (11 | ) |  | 1,684 |  |  | 1,557 |  |  | 11,818 |
Commercial & industrial | 28,008 |  |  | (173 | ) |  | 1,833 |  |  | (1,144 | ) |  | 28,524 |
HELOC | 813 |  |  | (90 | ) |  | 21 |  |  | 111 |  |  | 855 |
Consumer | 1,888 |  |  | (884 | ) |  | 1,297 |  |  | (1,157 | ) |  | 1,144 |
| $ | 113,494 |  |  | $ | (2,700 | ) |  | $ | 17,007 |  |  | $ | (4,728 | ) |  | $ | 123,073 |
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 general and specific reserves.
September 30, 2018 | Loans Collectively Evaluated for Impairment |  | Loans Individually Evaluated for Impairment
| General Reserve Allocation |  | Recorded Investment of Loans |  | Ratio |  | Specific Reserve Allocation |  | Recorded Investment of Loans |  | Ratio
| (In thousands) |  |  |  | (In thousands)
Single-family residential | $ | 33,033 |  |  | $ | 5,782,870 |  |  | 0.6 | % |  | $ | — |  |  | $ | 21,345 |  |  | — | %
Construction | 31,317 |  |  | 1,060,428 |  |  | 3.0 |  |  | — |  |  | 2,427 |  |  | — |
Construction - custom | 1,842 |  |  | 289,192 |  |  | 0.6 |  |  | — |  |  | — |  |  | — |
Land - acquisition & development | 7,969 |  |  | 122,639 |  |  | 6.5 |  |  | 9 |  |  | 920 |  |  | 1.0 |
Land - consumer lot loans | 2,164 |  |  | 96,583 |  |  | 2.2 |  |  | — |  |  | 507 |  |  | — |
Multi-family | 8,325 |  |  | 1,384,655 |  |  | 0.6 |  |  | 4 |  |  | 448 |  |  | 1.0 |
Commercial real estate | 11,702 |  |  | 1,432,791 |  |  | 0.8 |  |  | 150 |  |  | 19,378 |  |  | 0.8 |
Commercial & industrial | 28,348 |  |  | 1,126,438 |  |  | 2.5 |  |  | 354 |  |  | 14,437 |  |  | 2.5 |
HELOC | 781 |  |  | 128,715 |  |  | 0.6 |  |  | — |  |  | 1,162 |  |  | — |
Consumer | 3,259 |  |  | 173,181 |  |  | 1.9 |  |  | — |  |  | 56 |  |  | — |
| $ | 128,740 |  |  | $ | 11,597,492 |  |  | 1.1 | % |  | $ | 517 |  |  | $ | 60,680 |  |  | 0.9 | %
September 30, 2017 | Loans Collectively Evaluated for Impairment |  | Loans Individually Evaluated for Impairment
| General Reserve Allocation |  | Recorded Investment of Loans |  | Ratio |  | Specific Reserve Allocation |  | Recorded Investment of Loans |  | Ratio
| (In thousands) |  |  |  | (In thousands)
Single-family residential | $ | 36,892 |  |  | $ | 5,713,576 |  |  | 0.7 | % |  | $ | — |  |  | $ | 5,552 |  |  | — | %
Construction | 24,556 |  |  | 793,958 |  |  | 3.1 |  |  | — |  |  | — |  |  | — |
Construction - custom | 1,944 |  |  | 277,495 |  |  | 0.7 |  |  | — |  |  | 105 |  |  | — |
Land - acquisition & development | 6,828 |  |  | 104,767 |  |  | 6.5 |  |  | 1 |  |  | 89 |  |  | 1.0 |
Land - consumer lot loans | 2,649 |  |  | 96,337 |  |  | 2.8 |  |  | — |  |  | 171 |  |  | — |
Multi-family | 7,857 |  |  | 1,302,625 |  |  | 0.6 |  |  | 5 |  |  | 493 |  |  | 1.0 |
Commercial real estate | 11,698 |  |  | 1,391,668 |  |  | 0.8 |  |  | 120 |  |  | 21,765 |  |  | 0.6 |
Commercial & industrial | 28,524 |  |  | 1,093,210 |  |  | 2.6 |  |  | — |  |  | 81 |  |  | — |
HELOC | 855 |  |  | 141,689 |  |  | 0.6 |  |  | — |  |  | 215 |  |  | — |
Consumer | 1,144 |  |  | 84,887 |  |  | 1.4 |  |  | — |  |  | 82 |  |  | — |
| $ | 122,947 |  |  | $ | 11,000,212 |  |  | 1.1 | % |  | $ | 126 |  |  | $ | 28,553 |  |  | 0.4 | %
Summary of loans based on credit quality indicators | The following tables provide information on loans based on credit quality indicators (defined above).
September 30, 2018 | Internally Assigned Grade |  | Total
| Pass |  | Special mention |  | Substandard |  | Doubtful |  | Loss |  | Gross Loans
| (In thousands)
Loan type |  |  |  |  |  |  |  |  |  |  |
Single-family residential | $ | 5,766,096 |  |  | $ | — |  |  | $ | 32,870 |  |  | $ | — |  |  | $ | — |  |  | $ | 5,798,966 |
Construction | 1,886,304 |  |  | 1,937 |  |  | 2,427 |  |  | — |  |  | — |  |  | 1,890,668 |
Construction - custom | 624,479 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 624,479 |
Land - acquisition & development | 152,984 |  |  | — |  |  | 2,220 |  |  | — |  |  | — |  |  | 155,204 |
Land - consumer lot loans | 101,249 |  |  | — |  |  | 787 |  |  | — |  |  | — |  |  | 102,036 |
Multi-family | 1,378,803 |  |  | 1,633 |  |  | 4,689 |  |  | — |  |  | — |  |  | 1,385,125 |
Commercial real estate | 1,421,602 |  |  | 7,114 |  |  | 23,452 |  |  | — |  |  | — |  |  | 1,452,168 |
Commercial & industrial | 1,093,405 |  |  | 16,513 |  |  | 30,956 |  |  | — |  |  | — |  |  | 1,140,874 |
HELOC | 130,330 |  |  | — |  |  | 522 |  |  | — |  |  | — |  |  | 130,852 |
Consumer | 173,285 |  |  | — |  |  | 21 |  |  | — |  |  | — |  |  | 173,306 |
Total gross loans | $ | 12,728,537 |  |  | $ | 27,197 |  |  | $ | 97,944 |  |  | $ | — |  |  | $ | — |  |  | $ | 12,853,678 |
Total grade as a % of total gross loans | 99.0 | % |  | 0.2 | % |  | 0.8 | % |  | — | % |  | — | % |  |
September 30, 2017 | Internally Assigned Grade |  | Total
| Pass |  | Special mention |  | Substandard |  | Doubtful |  | Loss |  | Gross Loans
| (In thousands)
Loan type |  |  |  |  |  |  |  |  |  |  |
Single-family residential | $ | 5,671,229 |  |  | $ | — |  |  | $ | 39,775 |  |  | $ | — |  |  | $ | — |  |  | $ | 5,711,004 |
Construction | 1,594,926 |  |  | — |  |  | 3,070 |  |  | — |  |  | — |  |  | 1,597,996 |
Construction - custom | 602,540 |  |  | — |  |  | 91 |  |  | — |  |  | — |  |  | 602,631 |
Land - acquisition & development | 123,028 |  |  | 207 |  |  | 1,073 |  |  | — |  |  | — |  |  | 124,308 |
Land - consumer lot loans | 103,787 |  |  | — |  |  | 618 |  |  | — |  |  | — |  |  | 104,405 |
Multi-family | 1,295,261 |  |  | 5,795 |  |  | 2,092 |  |  | — |  |  | — |  |  | 1,303,148 |
Commercial real estate | 1,391,996 |  |  | 5,944 |  |  | 36,670 |  |  | — |  |  | — |  |  | 1,434,610 |
Commercial & industrial | 1,054,972 |  |  | 14,814 |  |  | 23,574 |  |  | — |  |  | — |  |  | 1,093,360 |
HELOC | 144,229 |  |  | — |  |  | 621 |  |  | — |  |  | — |  |  | 144,850 |
Consumer | 84,984 |  |  | — |  |  | 91 |  |  | — |  |  | — |  |  | 85,075 |
Total gross loans | $ | 12,066,952 |  |  | $ | 26,760 |  |  | $ | 107,675 |  |  | $ | — |  |  | $ | — |  |  | $ | 12,201,387 |
Total grade as a % of total gross loans | 98.9 | % |  | 0.2 | % |  | 0.9 | % |  | — | % |  | — | % |  |
Schedule of credit risk profile by payment activity | The following tables provide information on gross loans based on payment activity.
September 30, 2018 | Performing Loans |  | Non-Performing Loans
| Amount |  | % of Total Gross Loans |  | Amount |  | % of Total Gross Loans
| (In thousands) |  | (In thousands)
Single-family residential | $ | 5,771,323 |  |  | 99.5 | % |  | $ | 27,643 |  |  | 0.5 | %
Construction | 1,888,241 |  |  | 99.9 |  |  | 2,427 |  |  | 0.1 |
Construction - custom | 624,479 |  |  | 100.0 |  |  | — |  |  | — |
Land - acquisition & development | 154,284 |  |  | 99.4 |  |  | 920 |  |  | 0.6 |
Land - consumer lot loans | 101,249 |  |  | 99.2 |  |  | 787 |  |  | 0.8 |
Multi-family | 1,385,125 |  |  | 100.0 |  |  | — |  |  | — |
Commercial real estate | 1,443,197 |  |  | 99.4 |  |  | 8,971 |  |  | 0.6 |
Commercial & industrial | 1,126,480 |  |  | 98.7 |  |  | 14,394 |  |  | 1.3 |
HELOC | 130,329 |  |  | 99.6 |  |  | 523 |  |  | 0.4 |
Consumer | 173,285 |  |  | 100.0 |  |  | 21 |  |  | — |
| $ | 12,797,992 |  |  | 99.6 | % |  | $ | 55,686 |  |  | 0.4 | %
September 30, 2017 | Performing Loans |  | Non-Performing Loans
| Amount |  | % of Total Gross Loans |  | Amount |  | % of Total Gross Loans
| (In thousands) |  | (In thousands)
Single-family residential | $ | 5,683,074 |  |  | 99.5 | % |  | $ | 27,930 |  |  | 0.5 | %
Construction | 1,597,996 |  |  | 100.0 |  |  | — |  |  | — |
Construction - custom | 602,540 |  |  | 99.9 |  |  | 91 |  |  | 0.1 |
Land - acquisition & development | 124,012 |  |  | 99.8 |  |  | 296 |  |  | 0.2 |
Land - consumer lot loans | 103,800 |  |  | 99.4 |  |  | 605 |  |  | 0.6 |
Multi-family | 1,303,009 |  |  | 99.9 |  |  | 139 |  |  | 0.1 |
Commercial real estate | 1,422,795 |  |  | 99.2 |  |  | 11,815 |  |  | 0.8 |
Commercial & industrial | 1,085,278 |  |  | 99.3 |  |  | 8,082 |  |  | 0.7 |
HELOC | 144,319 |  |  | 99.6 |  |  | 531 |  |  | 0.4 |
Consumer | 84,984 |  |  | 99.9 |  |  | 91 |  |  | 0.1 |
| $ | 12,151,807 |  |  | 99.6 | % |  | $ | 49,580 |  |  | 0.4 | %
Summary of impaired loans based on type | The following tables provide information on impaired loans by loan category.
September 30, 2018 | Recorded Investment |  | Unpaid Principal Balance |  | Related Allowance |  | Average Recorded Investment
| (In thousands)
Impaired loans with no related allowance recorded: |  |  |  |  |  |  |
Single-family residential | $ | 18,872 |  |  | $ | 20,050 |  |  | $ | — |  |  | $ | 20,097 |
Construction | 2,698 |  |  | 2,818 |  |  | — |  |  | 1,349 |
Construction - custom | — |  |  | — |  |  | — |  |  | 74 |
Land - acquisition & development | 814 |  |  | 814 |  |  | — |  |  | 572 |
Land - consumer lot loans | 311 |  |  | 336 |  |  | — |  |  | 260 |
Multi-family | — |  |  | — |  |  | — |  |  | 70 |
Commercial real estate | 9,425 |  |  | 14,035 |  |  | — |  |  | 11,158 |
Commercial & industrial | 10,137 |  |  | 10,146 |  |  | — |  |  | 9,208 |
HELOC | 410 |  |  | 1,170 |  |  | — |  |  | 450 |
Consumer | 20 |  |  | 56 |  |  | — |  |  | 54 |
| 42,687 |  |  | 49,425 |  |  | — |  |  | 43,292 |
Impaired loans with an allowance recorded: |  |  |  |  |  |  |
Single-family residential | 139,796 |  |  | 143,099 |  |  | 2,871 |  |  | 161,729 |
Land - acquisition & development | 107 |  |  | 157 |  |  | — |  |  | 39 |
Land - consumer lot loans | 4,916 |  |  | 5,290 |  |  | 9 |  |  | 6,449 |
Multi-family | 448 |  |  | 448 |  |  | 4 |  |  | 471 |
Commercial real estate | 6,254 |  |  | 7,733 |  |  | 150 |  |  | 10,445 |
Commercial & industrial | 4,291 |  |  | 7,506 |  |  | 354 |  |  | 4,495 |
HELOC | 976 |  |  | 984 |  |  | — |  |  | 1,395 |
Consumer | 70 |  |  | 70 |  |  | — |  |  | 83 |
| 156,858 |  |  | 165,287 |  |  | 3,388 |  | (1) | 185,106 |
Total: |  |  |  |  |  |  |
Single-family residential | 158,668 |  |  | 163,149 |  |  | 2,871 |  |  | 181,826 |
Construction | 2,698 |  |  | 2,818 |  |  | — |  |  | 1,349 |
Construction - custom | — |  |  | — |  |  | — |  |  | 74 |
Land - acquisition & development | 921 |  |  | 971 |  |  | — |  |  | 611 |
Land - consumer lot loans | 5,227 |  |  | 5,626 |  |  | 9 |  |  | 6,709 |
Multi-family | 448 |  |  | 448 |  |  | 4 |  |  | 541 |
Commercial real estate | 15,679 |  |  | 21,768 |  |  | 150 |  |  | 21,603 |
Commercial & industrial | 14,428 |  |  | 17,652 |  |  | 354 |  |  | 13,703 |
HELOC | 1,386 |  |  | 2,154 |  |  | — |  |  | 1,845 |
Consumer | 90 |  |  | 126 |  |  | — |  |  | 137 |
| $ | 199,545 |  |  | $ | 214,712 |  |  | $ | 3,388 |  | (1) | $ | 228,398 |
____________________
(1) | Includes $517,000 of specific reserves and $2,871,000 included in the general reserves.
September 30, 2017 | Recorded Investment |  | Unpaid Principal Balance |  | Related Allowance |  | Average Recorded Investment
| (In thousands)
Impaired loans with no related allowance recorded: |  |  |  |  |  |  |
Single-family residential | $ | 21,325 |  |  | $ | 23,880 |  |  | $ | — |  |  | $ | 19,371 |
Construction - custom | 148 |  |  | 165 |  |  | — |  |  | 231 |
Land - acquisition & development | 330 |  |  | 8,208 |  |  | — |  |  | 176 |
Land - consumer lot loans | 208 |  |  | 330 |  |  | — |  |  | 431 |
Multi-family | 139 |  |  | 3,231 |  |  | — |  |  | 748 |
Commercial real estate | 12,890 |  |  | 22,487 |  |  | — |  |  | 11,466 |
Commercial & industrial | 8,279 |  |  | 14,321 |  |  | — |  |  | 7,425 |
HELOC | 490 |  |  | 1,212 |  |  | — |  |  | 487 |
Consumer | 88 |  |  | 1,433 |  |  | — |  |  | 57 |
| 43,897 |  |  | 75,267 |  |  | — |  |  | 40,392 |
Impaired loans with an allowance recorded: |  |  |  |  |  |  |
Single-family residential | 181,941 |  |  | 186,167 |  |  | 4,030 |  |  | 204,723 |
Land - acquisition & development | 90 |  |  | 90 |  |  | 1 |  |  | 576 |
Land - consumer lot loans | 7,949 |  |  | 8,526 |  |  | — |  |  | 8,976 |
Multi-family | 493 |  |  | 493 |  |  | 5 |  |  | 1,024 |
Commercial real estate | 15,079 |  |  | 16,707 |  |  | 120 |  |  | 16,991 |
Commercial & industrial | — |  |  | — |  |  | — |  |  | 297 |
HELOC | 1,728 |  |  | 1,806 |  |  | — |  |  | 1,451 |
Consumer | 97 |  |  | 284 |  |  | — |  |  | 100 |
| 207,377 |  |  | 214,073 |  |  | 4,156 |  | (1) | 234,138 |
Total: |  |  |  |  |  |  |
Single-family residential | 203,266 |  |  | 210,047 |  |  | 4,030 |  |  | 224,094 |
Construction - custom | 148 |  |  | 165 |  |  | — |  |  | 231 |
Land - acquisition & development | 420 |  |  | 8,298 |  |  | 1 |  |  | 752 |
Land - consumer lot loans | 8,157 |  |  | 8,856 |  |  | — |  |  | 9,407 |
Multi-family | 632 |  |  | 3,724 |  |  | 5 |  |  | 1,772 |
Commercial real estate | 27,969 |  |  | 39,194 |  |  | 120 |  |  | 28,457 |
Commercial & industrial | 8,279 |  |  | 14,321 |  |  | — |  |  | 7,722 |
HELOC | 2,218 |  |  | 3,018 |  |  | — |  |  | 1,938 |
Consumer | 185 |  |  | 1,717 |  |  | — |  |  | 157 |
| $ | 251,274 |  |  | $ | 289,340 |  |  | $ | 4,156 |  | (1) | $ | 274,530 |
____________________
(1) | Includes $126,000 of specific reserves and $4,030,000 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=84173941&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 29 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953659-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 55 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=82894031&loc=SL6953803-111525 + Details
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- Definition Tabular disclosure of impaired financing receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524 + Details
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- Definition Schedule of Credit Risk Profile by Payment Activity [Table Text Block] + References No definition available. + Details
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- Definition Schedule of Loans Collectively and Individually Evaluated for Impairment [Table Text Block] + References No definition available. + Details
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