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Allowance for Credit Losses (“ACL”) on Loans - Amount of Loans Receivable Held-for-Investment and Related Allowances Per Loan Portfolio Segment (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 | $ 39,274,000 | $ 43,197,000 | $ 38,973,000 | $ 37,607,000 |
Charge-offs | (525,000) | (12,000) | (710,000) | (2,444,000) |
Recoveries | 133,000 | 9,000 | 216,000 | 52,000 |
Provisions (credit) | 149,000 | (3,701,000) | 552,000 | (6,075,000) |
Ending balance | 39,031,000 | 39,493,000 | 39,031,000 | 39,493,000 |
Originated Loans Net |  |  |  |  |
Ending balance: individually evaluated for impairment | 36,600 |  | 36,600 |  | $ 30,200
Ending balance: collectively evaluated for impairment | 34,836,000 |  | 34,836,000 |  | 34,211,000
Ending balance: PCD loans evaluated for impairment | 4,158,000 |  | 4,158,000 |  | 4,732,000
Loans held-for-investments, net | 4,111,857,000 |  | 4,111,857,000 |  | 3,806,617,000
Ending balance: individually evaluated for impairment | 9,498,000 |  | 9,498,000 |  | 9,986,000
Ending balance: collectively evaluated for impairment | 4,077,274,000 |  | 4,077,274,000 |  | 3,740,295,000
Ending balance: PCD loans evaluated for impairment | 13,136,000 |  | 13,136,000 |  | 15,819,000
PPP loans not evaluated for impairment | 11,949,000 |  | 11,949,000 |  | 40,517,000
Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 |  |  |  | 10,353,000 |
Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 |  |  |  | 47,960,000 |
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 | 34,644,000 | 37,915,000 | 34,241,000 | 36,726,000 |
Charge-offs | 0 | (12,000) | (185,000) | (33,000) |
Recoveries | 133,000 | 9,000 | 216,000 | 52,000 |
Provisions (credit) | 96,000 | (3,239,000) | 601,000 | (5,613,000) |
Ending balance | 34,873,000 | 34,673,000 | 34,873,000 | 34,673,000 |
Originated Loans Net |  |  |  |  |
Ending balance: individually evaluated for impairment | 37,000 |  | 37,000 |  | 30,000
Ending balance: collectively evaluated for impairment | 34,836,000 |  | 34,836,000 |  | 34,211,000
Ending balance: PCD loans evaluated for impairment | 0 |  | 0 |  | 0
Loans held-for-investments, net | 4,098,721,000 |  | 4,098,721,000 |  | 3,790,798,000
Ending balance: individually evaluated for impairment | 9,498,000 |  | 9,498,000 |  | 9,986,000
Ending balance: collectively evaluated for impairment | 4,077,274,000 |  | 4,077,274,000 |  | 3,740,295,000
Ending balance: PCD loans evaluated for impairment | 0 |  | 0 |  | 0
PPP loans not evaluated for impairment | 11,949,000 |  | 11,949,000 |  | 40,517,000
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans: |  |  |  |  |
Originated Loans Net |  |  |  |  |
Loans held-for-investments, net | 3,962,987,000 |  | 3,962,987,000 |  | 3,647,778,000
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial and industrial loans |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 | 2,954,000 | 2,940,000 | 3,173,000 | 1,842,000 |
Charge-offs | 0 | (12,000) | (185,000) | (12,000) |
Recoveries | 114,000 | 7,000 | 119,000 | 28,000 |
Provisions (credit) | (363,000) | (341,000) | (402,000) | (211,000) |
Ending balance | 2,705,000 | 2,594,000 | 2,705,000 | 2,594,000 |
Originated Loans Net |  |  |  |  |
Ending balance: individually evaluated for impairment | 18,000 |  | 18,000 |  | 1,000
Ending balance: collectively evaluated for impairment | 2,687,000 |  | 2,687,000 |  | 3,172,000
Ending balance: PCD loans evaluated for impairment | 0 |  | 0 |  | 0
Loans held-for-investments, net | 133,422,000 |  | 133,422,000 |  | 141,005,000
Ending balance: individually evaluated for impairment | 99,000 |  | 99,000 |  | 34,000
Ending balance: collectively evaluated for impairment | 121,374,000 |  | 121,374,000 |  | 100,454,000
Ending balance: PCD loans evaluated for impairment | 0 |  | 0 |  | 0
PPP loans not evaluated for impairment | 11,949,000 |  | 11,949,000 |  | 40,517,000
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Other loans |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 | 9,000 | 9,000 | 9,000 | 198,000 |
Charge-offs | 0 | 0 | 0 | 0 |
Recoveries | 0 | 0 | 0 | 2,000 |
Provisions (credit) | 2,000 | (2,000) | 2,000 | (5,000) |
Ending balance | 11,000 | 7,000 | 11,000 | 7,000 |
Originated Loans Net |  |  |  |  |
Ending balance: individually evaluated for impairment | 0 |  | 0 |  | 0
Ending balance: collectively evaluated for impairment | 11,000 |  | 11,000 |  | 9,000
Ending balance: PCD loans evaluated for impairment | 0 |  | 0 |  | 0
Loans held-for-investments, net | 2,312,000 |  | 2,312,000 |  | 2,015,000
Ending balance: individually evaluated for impairment |  |  |  |  | 0
Ending balance: collectively evaluated for impairment | 2,312,000 |  | 2,312,000 |  | 2,015,000
Ending balance: PCD loans evaluated for impairment | 0 |  | 0 |  | 0
PPP loans not evaluated for impairment | 0 |  | 0 |  | 0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 |  |  |  | 3,541,000 |
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjustment | Commercial and industrial loans |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 |  |  |  | 947,000 |
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjustment | Other loans |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 |  |  |  | (188,000) |
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 |  |  |  | 40,267,000 |
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjusted Balance | Commercial and industrial loans |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 |  |  |  | 2,789,000 |
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjusted Balance | Other loans |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 |  |  |  | 10,000 |
PCD loans |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 | 4,630,000 | 5,282,000 | 4,732,000 | 881,000 |
Charge-offs | (525,000) | 0 | (525,000) | (2,411,000) |
Recoveries | 0 | 0 | 0 |  |
Provisions (credit) | 53,000 | (462,000) | (49,000) | (462,000) |
Ending balance | 4,158,000 | 4,820,000 | 4,158,000 | 4,820,000 |
Originated Loans Net |  |  |  |  |
Ending balance: individually evaluated for impairment | 0 |  | 0 |  | 0
Ending balance: collectively evaluated for impairment | 0 |  | 0 |  | 0
Ending balance: PCD loans evaluated for impairment | 4,158,000 |  | 4,158,000 |  | 4,732,000
Loans held-for-investments, net | 13,136,000 |  | 13,136,000 |  | 15,819,000
Ending balance: individually evaluated for impairment | 0 |  | 0 |  | 0
Ending balance: collectively evaluated for impairment | 0 |  | 0 |  | 0
Ending balance: PCD loans evaluated for impairment | 13,136,000 |  | 13,136,000 |  | 15,819,000
PPP loans not evaluated for impairment | 0 |  | 0 |  | 0
PCD loans | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 |  |  |  | 6,812,000 |
PCD loans | Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 |  |  |  | 7,693,000 |
Commercial | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans: |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 | 27,247,000 | 28,882,000 | 26,785,000 | 33,005,000 |
Charge-offs | 0 | 0 | 0 | 0 |
Recoveries | 19,000 | 0 | 97,000 | 19,000 |
Provisions (credit) | 799,000 | (2,342,000) | 1,183,000 | (4,535,000) |
Ending balance | 28,065,000 | 26,540,000 | 28,065,000 | 26,540,000 |
Originated Loans Net |  |  |  |  |
Ending balance: individually evaluated for impairment | 16,000 |  | 16,000 |  | 25,000
Ending balance: collectively evaluated for impairment | 28,048,000 |  | 28,048,000 |  | 26,760,000
Ending balance: PCD loans evaluated for impairment | 0 |  | 0 |  | 0
Loans held-for-investments, net | 3,621,188,000 |  | 3,621,188,000 |  | 3,326,662,000
Ending balance: individually evaluated for impairment | 8,679,000 |  | 8,679,000 |  | 8,352,000
Ending balance: collectively evaluated for impairment | 3,612,509,000 |  | 3,612,509,000 |  | 3,318,310,000
Ending balance: PCD loans evaluated for impairment | 0 |  | 0 |  | 0
PPP loans not evaluated for impairment | 0 |  | 0 |  | 0
Commercial | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjustment | Real estate loans: |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 |  |  |  | (1,949,000) |
Commercial | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjusted Balance | Real estate loans: |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 |  |  |  | 31,056,000 |
One-to-four family residential mortgage | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans: |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 | 3,589,000 | 5,172,000 | 3,545,000 | 207,000 |
Charge-offs | 0 | 0 | 0 | (21,000) |
Recoveries | 0 | 1,000 | 0 | 2,000 |
Provisions (credit) | (584,000) | (563,000) | (540,000) | (811,000) |
Ending balance | 3,005,000 | 4,610,000 | 3,005,000 | 4,610,000 |
Originated Loans Net |  |  |  |  |
Ending balance: individually evaluated for impairment | 0 |  | 0 |  | 2,000
Ending balance: collectively evaluated for impairment | 3,005,000 |  | 3,005,000 |  | 3,543,000
Ending balance: PCD loans evaluated for impairment | 0 |  | 0 |  | 0
Loans held-for-investments, net | 185,376,000 |  | 185,376,000 |  | 183,665,000
Ending balance: individually evaluated for impairment | 692,000 |  | 692,000 |  | 1,562,000
Ending balance: collectively evaluated for impairment | 184,684,000 |  | 184,684,000 |  | 182,103,000
Ending balance: PCD loans evaluated for impairment | 0 |  | 0 |  | 0
PPP loans not evaluated for impairment | 0 |  | 0 |  | 0
One-to-four family residential mortgage | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjustment | Real estate loans: |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 |  |  |  | 5,233,000 |
One-to-four family residential mortgage | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjusted Balance | Real estate loans: |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 |  |  |  | 5,440,000 |
Home equity and lines of credit | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans: |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 | 679,000 | 643,000 | 560,000 | 260,000 |
Charge-offs | 0 | 0 | 0 | 0 |
Recoveries | 0 | 1,000 | 0 | 1,000 |
Provisions (credit) | 123,000 | 19,000 | 242,000 | (17,000) |
Ending balance | 802,000 | 663,000 | 802,000 | 663,000 |
Originated Loans Net |  |  |  |  |
Ending balance: individually evaluated for impairment | 3,000 |  | 3,000 |  | 2,000
Ending balance: collectively evaluated for impairment | 800,000 |  | 800,000 |  | 558,000
Ending balance: PCD loans evaluated for impairment | 0 |  | 0 |  | 0
Loans held-for-investments, net | 137,868,000 |  | 137,868,000 |  | 109,956,000
Ending balance: individually evaluated for impairment | 28,000 |  | 28,000 |  | 38,000
Ending balance: collectively evaluated for impairment | 137,840,000 |  | 137,840,000 |  | 109,918,000
Ending balance: PCD loans evaluated for impairment | 0 |  | 0 |  | 0
PPP loans not evaluated for impairment | 0 |  | 0 |  | 0
Home equity and lines of credit | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjustment | Real estate loans: |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 |  |  |  | 419,000 |
Home equity and lines of credit | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjusted Balance | Real estate loans: |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 |  |  |  | 679,000 |
Construction and land | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans: |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 | 166,000 | 269,000 | 169,000 | 1,214,000 |
Charge-offs | 0 | 0 | 0 | 0 |
Recoveries | 0 | 0 | 0 | 0 |
Provisions (credit) | 119,000 | (10,000) | 116,000 | (34,000) |
Ending balance | 285,000 | $ 259,000 | 285,000 | 259,000 |
Originated Loans Net |  |  |  |  |
Ending balance: individually evaluated for impairment | 0 |  | 0 |  | 0
Ending balance: collectively evaluated for impairment | 285,000 |  | 285,000 |  | 169,000
Ending balance: PCD loans evaluated for impairment | 0 |  | 0 |  | 0
Loans held-for-investments, net | 18,555,000 |  | 18,555,000 |  | 27,495,000
Ending balance: individually evaluated for impairment | 0 |  | 0 |  | 0
Ending balance: collectively evaluated for impairment | 18,555,000 |  | 18,555,000 |  | 27,495,000
Ending balance: PCD loans evaluated for impairment | 0 |  | 0 |  | 0
PPP loans not evaluated for impairment | $ 0 |  | $ 0 |  | $ 0
Construction and land | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjustment | Real estate loans: |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 |  |  |  | (921,000) |
Construction and land | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjusted Balance | Real estate loans: |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Balance at January 1, 2021 |  |  |  | $ 293,000 |

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- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 + Details
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