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Loans and Allowance for Credit Losses - Financing Receivable, Allowance for Credit Loss (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jan. 01, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Balance at beginning of period | $ 55,743 | $ 55,743 |  |
Provision for Loan and Lease Losses |  | (6,700) | $ 15,871 | $ 6,150
Balance at end of period |  | 60,754 | 55,743 |
Allowance for unfunded commitment |  |  |  |
Balance at beginning of period | 0 | 0 |  |
Provision (credit) charged to expense |  | 939 |  |
Balance at end of period | 8,690 | 9,629 | 0 |
CECL adoption | Allowance for unfunded commitment |  |  |  |
Provision for Loan and Lease Losses | 8,690 |  |  |
Loans Receivable |  |  |  |
Balance at beginning of period |  |  | 40,294 | 38,409
Provision (credit) charged to expense |  |  |  | 6,150
Losses charged off |  |  |  | (8,062)
Recoveries |  |  |  | 3,797
Balance at end of period |  |  |  | 40,294
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment |  |  | 713 | 929
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment |  |  | 54,350 | 38,704
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses |  |  | 680 | 661
Financing Receivable, Individually Evaluated for Impairment |  |  | 9,048 | 10,267
Financing Receivable, Collectively Evaluated for Impairment |  |  | 5,117,838 | 4,914,573
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model |  |  | 98,643 | 127,206
Loans Receivable | Allowance for credit losses |  |  |  |
Balance at beginning of period | 55,743 | 55,743 | 40,294 |
Provision (credit) charged to expense |  | (6,700) | 15,871 |
Losses charged off |  | (2,621) | (3,294) |
Recoveries |  | 2,737 | 2,872 |
Balance at end of period | 67,338 | 60,754 | 55,743 | 40,294
Loans Receivable | CECL adoption | Allowance for credit losses |  |  |  |
Provision (credit) charged to expense | 11,595 |  |  |
Commercial Real Estate |  |  |  |
Balance at beginning of period |  |  | 24,334 | 19,803
Provision (credit) charged to expense |  |  |  | 4,651
Losses charged off |  |  |  | (144)
Recoveries |  |  |  | 24
Balance at end of period |  |  |  | 24,334
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment |  |  | 445 | 517
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment |  |  | 32,937 | 23,570
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses |  |  | 325 | 247
Financing Receivable, Individually Evaluated for Impairment |  |  | 3,438 | 4,020
Financing Receivable, Collectively Evaluated for Impairment |  |  | 1,550,239 | 1,490,152
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model |  |  | 24,613 | 29,158
Commercial Real Estate | Allowance for unfunded commitment |  |  |  |
Balance at beginning of period | 0 | 0 |  |
Provision (credit) charged to expense |  | 13 |  |
Balance at end of period | 354 | 367 | 0 |
Commercial Real Estate | Allowance for credit losses |  |  |  |
Balance at beginning of period | 33,707 | 33,707 | 24,334 |
Provision (credit) charged to expense |  | (2,478) | 9,343 |
Losses charged off |  | (142) | (43) |
Recoveries |  | 48 | 73 |
Balance at end of period | 31,176 | 28,604 | 33,707 | 24,334
Commercial Real Estate | CECL adoption | Allowance for unfunded commitment |  |  |  |
Provision for Loan and Lease Losses | 354 |  |  |
Commercial Real Estate | CECL adoption | Allowance for credit losses |  |  |  |
Provision (credit) charged to expense | (2,531) |  |  |
Commercial construction |  |  |  |
Balance at beginning of period |  |  | 3,076 | 3,105
Provision (credit) charged to expense |  |  |  | 22
Losses charged off |  |  |  | (101)
Recoveries |  |  |  | 50
Balance at end of period |  |  |  | 3,076
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment |  |  | 3,378 | 2,940
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses |  |  | 143 | 136
Financing Receivable, Collectively Evaluated for Impairment |  |  | 1,266,847 | 1,363,292
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model |  |  | 2,551 | 3,606
Commercial construction | Allowance for unfunded commitment |  |  |  |
Balance at beginning of period | 0 | 0 |  |
Provision (credit) charged to expense |  | (2) |  |
Balance at end of period | 910 | 908 | 0 |
Commercial construction | Allowance for credit losses |  |  |  |
Balance at beginning of period | 3,521 | 3,521 | 3,076 |
Provision (credit) charged to expense |  | 575 | 242 |
Losses charged off |  | (154) | (1) |
Recoveries |  | 20 | 204 |
Balance at end of period | 2,356 | 2,797 | 3,521 | 3,076
Commercial construction | CECL adoption | Allowance for unfunded commitment |  |  |  |
Provision for Loan and Lease Losses | 910 |  |  |
Commercial construction | CECL adoption | Allowance for credit losses |  |  |  |
Provision (credit) charged to expense | (1,165) |  |  |
One- to four-family residential construction |  |  |  |
Balance at beginning of period |  |  | 4,339 | 3,122
Provision (credit) charged to expense |  |  |  | 1,625
Losses charged off |  |  |  | (534)
Recoveries |  |  |  | 126
Balance at end of period |  |  |  | 4,339
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment |  |  | 90 | 198
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment |  |  | 4,382 | 3,973
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses |  |  | 64 | 168
Financing Receivable, Individually Evaluated for Impairment |  |  | 3,546 | 2,960
Financing Receivable, Collectively Evaluated for Impairment |  |  | 655,146 | 554,450
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model |  |  | 57,113 | 74,562
One- to four-family residential construction | Allowance for unfunded commitment |  |  |  |
Balance at beginning of period | 0 | 0 |  |
Provision (credit) charged to expense |  | (230) |  |
Balance at end of period | 917 | 687 | 0 |
One- to four-family residential construction | Allowance for credit losses |  |  |  |
Balance at beginning of period | 4,536 | 4,536 | 4,339 |
Provision (credit) charged to expense |  |  | 84 |
Losses charged off |  | (190) | (70) |
Recoveries |  | 485 | 183 |
Balance at end of period | 9,069 | 9,364 | 4,536 | 4,339
One- to four-family residential construction | CECL adoption | Allowance for unfunded commitment |  |  |  |
Provision for Loan and Lease Losses | 917 |  |  |
One- to four-family residential construction | CECL adoption | Allowance for credit losses |  |  |  |
Provision (credit) charged to expense | 4,533 |  |  |
Other residential |  |  |  |
Balance at beginning of period |  |  | 5,153 | 4,713
Provision (credit) charged to expense |  |  |  | 603
Losses charged off |  |  |  | (189)
Recoveries |  |  |  | 26
Balance at end of period |  |  |  | 5,153
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment |  |  | 9,282 | 5,101
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses |  |  | 93 | 52
Financing Receivable, Collectively Evaluated for Impairment |  |  | 1,021,145 | 866,006
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model |  |  | 6,150 | 5,334
Other residential | Allowance for unfunded commitment |  |  |  |
Balance at beginning of period | 0 | 0 |  |
Provision (credit) charged to expense |  | 476 |  |
Balance at end of period | 5,227 | 5,703 | 0 |
Other residential | Allowance for credit losses |  |  |  |
Balance at beginning of period | 9,375 | 9,375 | 5,153 |
Provision (credit) charged to expense |  | (4,797) | 4,042 |
Recoveries |  | 92 | 180 |
Balance at end of period | 15,207 | 10,502 | 9,375 | 5,153
Other residential | CECL adoption | Allowance for unfunded commitment |  |  |  |
Provision for Loan and Lease Losses | 5,227 |  |  |
Other residential | CECL adoption | Allowance for credit losses |  |  |  |
Provision (credit) charged to expense | 5,832 |  |  |
Commercial business |  |  |  |
Balance at beginning of period |  |  | 1,355 | 1,568
Provision (credit) charged to expense |  |  |  | (309)
Losses charged off |  |  |  | (371)
Recoveries |  |  |  | 467
Balance at end of period |  |  |  | 1,355
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment |  |  | 14 | 13
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment |  |  | 2,331 | 1,306
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses |  |  | 45 | 36
Financing Receivable, Individually Evaluated for Impairment |  |  | 167 | 1,286
Financing Receivable, Collectively Evaluated for Impairment |  |  | 384,734 | 325,112
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model |  |  | 2,549 | 3,356
Commercial business | Allowance for unfunded commitment |  |  |  |
Balance at beginning of period | 0 | 0 |  |
Provision (credit) charged to expense |  | 647 |  |
Balance at end of period | 935 | 1,582 | 0 |
Commercial business | Allowance for credit losses |  |  |  |
Balance at beginning of period | 2,390 | 2,390 | 1,355 |
Provision (credit) charged to expense |  |  | 914 |
Losses charged off |  | (81) | (28) |
Recoveries |  | 334 | 149 |
Balance at end of period | 3,889 | 4,142 | 2,390 | 1,355
Commercial business | CECL adoption | Allowance for unfunded commitment |  |  |  |
Provision for Loan and Lease Losses | 935 |  |  |
Commercial business | CECL adoption | Allowance for credit losses |  |  |  |
Provision (credit) charged to expense | 1,499 |  |  |
Consumer |  |  |  |
Balance at beginning of period |  |  | 2,037 | 6,098
Provision (credit) charged to expense |  |  |  | (442)
Losses charged off |  |  |  | (6,723)
Recoveries |  |  |  | 3,104
Balance at end of period |  |  |  | 2,037
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment |  |  | 164 | 201
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment |  |  | 2,040 | 1,814
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses |  |  | 10 | 22
Financing Receivable, Individually Evaluated for Impairment |  |  | 1,897 | 2,001
Financing Receivable, Collectively Evaluated for Impairment |  |  | 239,727 | 315,561
All Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Not Accounted for Using Income Recognition Model |  |  | 5,667 | 11,190
Consumer | Allowance for unfunded commitment |  |  |  |
Balance at beginning of period | 0 | 0 |  |
Provision (credit) charged to expense |  | 35 |  |
Balance at end of period | 347 | 382 | 0 |
Consumer | Allowance for credit losses |  |  |  |
Balance at beginning of period | 2,214 | 2,214 | 2,037 |
Provision (credit) charged to expense |  |  | 1,246 |
Losses charged off |  | (2,054) | (3,152) |
Recoveries |  | 1,758 | 2,083 |
Balance at end of period | 5,641 | $ 5,345 | $ 2,214 | $ 2,037
Consumer | CECL adoption | Allowance for unfunded commitment |  |  |  |
Provision for Loan and Lease Losses | 347 |  |  |
Consumer | CECL adoption | Allowance for credit losses |  |  |  |
Provision (credit) charged to expense | $ 3,427 |  |  |

X
- Definition The carrying amount as of the balance sheet date of loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer, for which it was deemed probable at acquisition that the investor would be unable to collect all contractually required payments, and to which the income recognition total model was not applied. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123409700&loc=d3e13503-111538 + Details
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- Definition Reserve for loans impairments recorded after acquisition as a result of current information and events which result in it being probable that estimated cash flows will be less than previously expected or because actual cash flows are less than cash flows previously expected. This relates to loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that was acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123409700&loc=d3e13503-111538 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544 + Details
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