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Allowance for Losses on Loans (Tables) | 3 Months Ended
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Dec. 31, 2016
Receivables [Abstract] |
Summary of Activity in Allowance for Loan Losses | The following tables summarize the activity in the allowance for loan losses.
Three Months Ended December 31, 2016 | Beginning Allowance |  | Charge-offs |  | Recoveries |  | Provision & Transfers |  | Ending Allowance
| (In thousands)
Single-family residential | $ | 37,796 |  |  | $ | (115 | ) |  | $ | 151 |  |  | $ | 374 |  |  | $ | 38,206 |
Construction | 19,838 |  |  | — |  |  | — |  |  | 2,096 |  |  | 21,934 |
Construction - custom | 1,080 |  |  | — |  |  | — |  |  | 30 |  |  | 1,110 |
Land - acquisition & development | 6,023 |  |  | (20 | ) |  | 4,018 |  |  | (3,356 | ) |  | 6,665 |
Land - consumer lot loans | 2,535 |  |  | (17 | ) |  | 70 |  |  | (87 | ) |  | 2,501 |
Multi-family | 6,925 |  |  | — |  |  | — |  |  | 704 |  |  | 7,629 |
Commercial real estate | 8,588 |  |  | (11 | ) |  | 356 |  |  | 1,235 |  |  | 10,168 |
Commercial & industrial | 28,008 |  |  | (58 | ) |  | 725 |  |  | (939 | ) |  | 27,736 |
HELOC | 813 |  |  | (37 | ) |  | 1 |  |  | 55 |  |  | 832 |
Consumer | 1,888 |  |  | (146 | ) |  | 379 |  |  | (446 | ) |  | 1,675 |
| $ | 113,494 |  |  | $ | (404 | ) |  | $ | 5,700 |  |  | $ | (334 | ) |  | $ | 118,456 |
Three Months Ended December 31, 2015 | Beginning Allowance |  | Charge-offs |  | Recoveries |  | Provision & Transfers |  | Ending Allowance
| (In thousands)
Single-family residential | $ | 47,347 |  |  | $ | (1,139 | ) |  | $ | 2,466 |  |  | $ | (918 | ) |  | $ | 47,756 |
Construction | 6,680 |  |  | — |  |  | 155 |  |  | 179 |  |  | 7,014 |
Construction - custom | 990 |  |  | (60 | ) |  | — |  |  | 132 |  |  | 1,062 |
Land - acquisition & development | 5,781 |  |  | — |  |  | 35 |  |  | 962 |  |  | 6,778 |
Land - consumer lot loans | 2,946 |  |  | (408 | ) |  | — |  |  | 463 |  |  | 3,001 |
Multi-family | 5,304 |  |  | — |  |  | — |  |  | (257 | ) |  | 5,047 |
Commercial real estate | 8,960 |  |  | (23 | ) |  | 123 |  |  | 1,284 |  |  | 10,344 |
Commercial & industrial | 24,980 |  |  | (248 | ) |  | 1 |  |  | (637 | ) |  | 24,096 |
HELOC | 902 |  |  | (1 | ) |  | 21 |  |  | (102 | ) |  | 820 |
Consumer | 2,939 |  |  | (242 | ) |  | 392 |  |  | (1,106 | ) |  | 1,983 |
| $ | 106,829 |  |  | $ | (2,121 | ) |  | $ | 3,193 |  |  | $ | — |  |  | $ | 107,901 |
Summary of Loans Collectively and Individually Evaluated for Impairment and Related Allocation of Reserves | The following tables show loans collectively and individually evaluated for impairment and the related allocation of general and specific reserves.
December 31, 2016 | Loans Collectively Evaluated for Impairment |  | Loans Individually Evaluated for Impairment
| Allowance Allocation |  | Recorded Investment of Loans (1) |  | Ratio |  | Allowance Allocation |  | Recorded Investment of Loans (1) |  | Ratio
| (In thousands) |  |  |  | (In thousands)
Single-family residential | $ | 38,092 |  |  | $ | 5,585,461 |  |  | 0.7 | % |  | $ | 114 |  |  | $ | 30,165 |  |  | 0.4 | %
Construction | 21,934 |  |  | 513,046 |  |  | 4.3 |  |  | — |  |  | — |  |  | — |
Construction - custom | 1,110 |  |  | 236,668 |  |  | 0.5 |  |  | — |  |  | — |  |  | — |
Land - acquisition & development | 6,621 |  |  | 101,598 |  |  | 6.5 |  |  | 44 |  |  | 886 |  |  | 5.0 |
Land - consumer lot loans | 2,501 |  |  | 90,947 |  |  | 2.7 |  |  | — |  |  | 1,384 |  |  | — |
Multi-family | 7,617 |  |  | 1,215,870 |  |  | 0.6 |  |  | 12 |  |  | 1,496 |  |  | 0.8 |
Commercial real estate | 9,971 |  |  | 1,144,389 |  |  | 0.9 |  |  | 197 |  |  | 15,473 |  |  | 1.3 |
Commercial & industrial | 27,736 |  |  | 1,021,372 |  |  | 2.7 |  |  | — |  |  | 1,517 |  |  | — |
HELOC | 832 |  |  | 138,094 |  |  | 0.6 |  |  | — |  |  | 805 |  |  | — |
Consumer | 1,675 |  |  | 124,255 |  |  | 1.3 |  |  | — |  |  | — |  |  | — |
| $ | 118,089 |  |  | $ | 10,171,700 |  |  | 1.2 | % |  | $ | 367 |  |  | $ | 51,726 |  |  | 0.7 | %
(1) | Excludes acquired impaired loans and covered loans.
September 30, 2016 | Loans Collectively Evaluated for Impairment |  | Loans Individually Evaluated for Impairment
| Allowance Allocation |  | Recorded Investment of Loans (1) |  | Ratio |  | Allowance Allocation |  | Recorded Investment of Loans (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 impaired loans and covered loans
Summary of Loans Based on Credit Quality Indicators | The following tables provide information on loans based on risk rating categories as defined above.
December 31, 2016 | Internally Assigned Grade |  |
| Pass |  | Special mention |  | Substandard |  | Doubtful |  | Loss |  | Total Gross Loans
| (In thousands)
Loan type |  |  |  |  |  |  |  |  |  |  |
Single-family residential | $ | 5,568,663 |  |  | $ | — |  |  | $ | 55,600 |  |  | $ | — |  |  | $ | — |  |  | $ | 5,624,263 |
Construction | 1,256,396 |  |  | 5,876 |  |  | 3,475 |  |  | — |  |  | — |  |  | 1,265,747 |
Construction - custom | 494,447 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 494,447 |
Land - acquisition & development | 113,569 |  |  | — |  |  | 5,516 |  |  | — |  |  | — |  |  | 119,085 |
Land - consumer lot loans | 99,703 |  |  | — |  |  | 1,401 |  |  | — |  |  | — |  |  | 101,104 |
Multi-family | 1,211,055 |  |  | 3,658 |  |  | 2,881 |  |  | — |  |  | — |  |  | 1,217,594 |
Commercial real estate | 1,163,517 |  |  | 6,660 |  |  | 37,396 |  |  | — |  |  | — |  |  | 1,207,573 |
Commercial & industrial | 969,186 |  |  | 10,813 |  |  | 45,822 |  |  | — |  |  | — |  |  | 1,025,821 |
HELOC | 147,495 |  |  | — |  |  | 957 |  |  | — |  |  | — |  |  | 148,452 |
Consumer | 124,499 |  |  | — |  |  | 48 |  |  | — |  |  | — |  |  | 124,547 |
Total gross loans | $ | 11,148,530 |  |  | $ | 27,007 |  |  | $ | 153,096 |  |  | $ | — |  |  | $ | — |  |  | $ | 11,328,633 |
Total grade as a % of total gross loans | 98.4 | % |  | 0.2 | % |  | 1.4 | % |  | — | % |  | — | % |  |
September 30, 2016 | Internally Assigned Grade |  |
| Pass |  | Special mention |  | Substandard |  | Doubtful |  | Loss |  | Total Gross Loans
| (In thousands)
Loan type |  |  |  |  |  |  |  |  |  |  |
Single-family residential | $ | 5,607,521 |  |  | $ | — |  |  | $ | 51,309 |  |  | $ | — |  |  | $ | — |  |  | $ | 5,658,830 |
Construction | 1,098,549 |  |  | 8,595 |  |  | 3,267 |  |  | — |  |  | — |  |  | 1,110,411 |
Construction - custom | 473,069 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 473,069 |
Land - acquisition & development | 111,225 |  |  | — |  |  | 7,272 |  |  | — |  |  | — |  |  | 118,497 |
Land - consumer lot loans | 103,528 |  |  | — |  |  | 1,039 |  |  | — |  |  | — |  |  | 104,567 |
Multi-family | 1,117,437 |  |  | 3,237 |  |  | 3,616 |  |  | — |  |  | — |  |  | 1,124,290 |
Commercial real estate | 1,033,880 |  |  | 13,446 |  |  | 46,313 |  |  | — |  |  | — |  |  | 1,093,639 |
Commercial & industrial | 930,776 |  |  | 7,207 |  |  | 40,606 |  |  | — |  |  | — |  |  | 978,589 |
HELOC | 149,195 |  |  | — |  |  | 521 |  |  | — |  |  | — |  |  | 149,716 |
Consumer | 138,917 |  |  | — |  |  | 83 |  |  | — |  |  | — |  |  | 139,000 |
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 | % |  | — | % |  | — | % |  |
The balance of loans internally graded as 'substandard' above includes $27,835,000 as of December 31, 2016 and $35,910,000 as of September 30, 2016 of acquired loans and covered loans. The following tables provide information on loans (excluding acquired and covered loans) based on borrower payment activity.
December 31, 2016 | Performing Loans |  | Non-Performing Loans
| Amount |  | % of Total Gross Loans |  | Amount |  | % of Total Gross Loans
| (In thousands)
Single-family residential | $ | 5,549,864 |  |  | 99.3 | % |  | $ | 38,568 |  |  | 0.7 | %
Construction | 1,265,747 |  |  | 100.0 |  |  | — |  |  | — |
Construction - custom | 494,447 |  |  | 100.0 |  |  | — |  |  | — |
Land - acquisition & development | 116,567 |  |  | 99.5 |  |  | 603 |  |  | 0.5 |
Land - consumer lot loans | 97,556 |  |  | 99.0 |  |  | 969 |  |  | 1.0 |
Multi-family | 1,211,411 |  |  | 99.9 |  |  | 1,160 |  |  | 0.1 |
Commercial real estate | 1,079,298 |  |  | 99.1 |  |  | 9,660 |  |  | 0.9 |
Commercial & industrial | 971,931 |  |  | 99.1 |  |  | 9,230 |  |  | 0.9 |
HELOC | 135,306 |  |  | 99.6 |  |  | 480 |  |  | 0.4 |
Consumer | 123,140 |  |  | 100.0 |  |  | 45 |  |  | — |
| $ | 11,045,267 |  |  | 99.5 | % |  | $ | 60,715 |  |  | 0.5 | %
September 30, 2016 | Performing Loans |  | Non-Performing Loans
| Amount |  | % of Total Gross Loans |  | Amount |  | % of Total Gross Loans
| (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 | %
Summary of Impaired Loans Based on Type | The following tables provide information on impaired loan balances and the related allowances by loan types.
December 31, 2016 | Recorded Investment |  | Unpaid Principal Balance |  | Related Allowance |  | Average Recorded Investment
| (In thousands)
Impaired loans with no related allowance recorded: |  |  |  |  |  |  |
Single-family residential | $ | 15,488 |  |  | $ | 17,258 |  |  | $ | — |  |  | $ | 11,050 |
Land - acquisition & development | 165 |  |  | 8,396 |  |  | — |  |  | 152 |
Land - consumer lot loans | 713 |  |  | 765 |  |  | — |  |  | 525 |
Multi-family | 1,160 |  |  | 5,096 |  |  | — |  |  | 968 |
Commercial real estate | 11,407 |  |  | 19,829 |  |  | — |  |  | 11,180 |
Commercial & industrial | 9,680 |  |  | 15,065 |  |  | — |  |  | 5,355 |
HELOC | 767 |  |  | 1,028 |  |  | — |  |  | 471 |
Consumer | 44 |  |  | 592 |  |  | — |  |  | 51 |
| 39,424 |  |  | 68,029 |  |  | — |  |  | 29,752 |
Impaired loans with an allowance recorded: |  |  |  |  |  |  |
Single-family residential | 212,046 |  |  | 216,469 |  |  | 4,502 |  |  | 210,497 |
Land - acquisition & development | 851 |  |  | 1,791 |  |  | 2 |  |  | 851 |
Land - consumer lot loans | 9,056 |  |  | 10,114 |  |  | 41 |  |  | 9,002 |
Multi-family | 1,496 |  |  | 1,496 |  |  | 12 |  |  | 1,501 |
Commercial real estate | 18,246 |  |  | 21,497 |  |  | 197 |  |  | 17,751 |
Commercial & industrial | 1,356 |  |  | 2,414 |  |  | — |  |  | 678 |
HELOC | 1,200 |  |  | 1,218 |  |  | — |  |  | 1,088 |
Consumer | 77 |  |  | 271 |  |  | — |  |  | 78 |
| 244,328 |  |  | 255,270 |  |  | 4,754 |  | (1) | 241,446 |
Total impaired loans: |  |  |  |  |  |  |
Single-family residential | 227,534 |  |  | 233,727 |  |  | 4,502 |  |  | 221,547 |
Land - acquisition & development | 1,016 |  |  | 10,187 |  |  | 2 |  |  | 1,003 |
Land - consumer lot loans | 9,769 |  |  | 10,879 |  |  | 41 |  |  | 9,527 |
Multi-family | 2,656 |  |  | 6,592 |  |  | 12 |  |  | 2,469 |
Commercial real estate | 29,653 |  |  | 41,326 |  |  | 197 |  |  | 28,931 |
Commercial & industrial | 11,036 |  |  | 17,479 |  |  | — |  |  | 6,033 |
HELOC | 1,967 |  |  | 2,246 |  |  | — |  |  | 1,559 |
Consumer | 121 |  |  | 863 |  |  | — |  |  | 129 |
| $ | 283,752 |  |  | $ | 323,299 |  |  | $ | 4,754 |  | (1) | $ | 271,198 |
(1) | Includes $367,000 of specific reserves and $4,387,000 included in the general reserves.
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 |
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 |
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 |
HELOC | 1,506 |  |  | 1,521 |  |  | — |  |  | 1,413 |
Consumer | 116 |  |  | 306 |  |  | — |  |  | 100 |
| 261,531 |  |  | 271,547 |  |  | 3,915 |  | (1) | 250,292 |
Total impaired loans: |  |  |  |  |  |  |
Single-family residential | 237,813 |  |  | 243,961 |  |  | 3,809 |  |  | 223,143 |
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

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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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- Definition Schedule of Loans Collectively and Individually Evaluated for Impairment [Table Text Block] + References No definition available. + Details
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