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Allowance for Loan and Lease Losses - Summary of Additional Information about Impaired Loans (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2020 | Dec. 31, 2019
Financing Receivable, Impaired [Line Items] |  |
Impaired loans with no related allowance, Recorded Investment | $ 46,973 | $ 56,936
Impaired loans with no related allowance, Unpaid Principal Balance |  | 143,149
Impaired loans with no related allowance, Average Recorded Investment |  | 54,393
Impaired loans with no related allowance, Interest Income Recognized | 806 | 3,516
Impaired loans with an allowance recorded, Recorded Investment | 6,698 | 1,445
Impaired loans with an allowance recorded, Unpaid Principal Balance |  | 4,173
Impaired loans with an allowance recorded, Related Allowance | 761 | 116
Impaired loans with an allowance recorded, Average Recorded Investment |  | 4,111
Impaired loans with an allowance recorded, Interest Income Recognized | 66 | 13
Total impaired loans, Recorded Investment | 53,671 | 58,381
Total impaired loans, Unpaid Principal Balance |  | 147,322
Total impaired loans, Average Recorded Investment |  | 58,504
Total impaired loans, Interest Income Recognized | 872 | 3,529
Multi-Family |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired loans with no related allowance, Recorded Investment | 2,248 | 3,577
Impaired loans with no related allowance, Unpaid Principal Balance |  | 6,790
Impaired loans with no related allowance, Average Recorded Investment |  | 4,336
Impaired loans with no related allowance, Interest Income Recognized | 121 | 266
Impaired loans with an allowance recorded, Recorded Investment | 4,068 |
Impaired loans with an allowance recorded, Related Allowance | 443 |
Impaired loans with an allowance recorded, Interest Income Recognized | 28 |
Total impaired loans, Recorded Investment | 6,316 | 3,577
Total impaired loans, Unpaid Principal Balance |  | 6,790
Total impaired loans, Average Recorded Investment |  | 4,336
Total impaired loans, Interest Income Recognized | 149 | 266
Commercial Real Estate |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired loans with no related allowance, Recorded Investment | 14,699 | 14,717
Impaired loans with no related allowance, Unpaid Principal Balance |  | 19,832
Impaired loans with no related allowance, Average Recorded Investment |  | 6,140
Impaired loans with no related allowance, Interest Income Recognized | 24 | 371
Impaired loans with an allowance recorded, Recorded Investment | 1,484 |
Impaired loans with an allowance recorded, Related Allowance | 117 |
Impaired loans with an allowance recorded, Interest Income Recognized | 31 |
Total impaired loans, Recorded Investment | 16,183 | 14,717
Total impaired loans, Unpaid Principal Balance |  | 19,832
Total impaired loans, Average Recorded Investment |  | 6,140
Total impaired loans, Interest Income Recognized | 55 | 371
One-to-Four Family |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired loans with no related allowance, Recorded Investment | 570 | 584
Impaired loans with no related allowance, Unpaid Principal Balance |  | 602
Impaired loans with no related allowance, Average Recorded Investment |  | 811
Impaired loans with no related allowance, Interest Income Recognized | 10 | 21
Impaired loans with an allowance recorded, Recorded Investment | 1,146 |
Impaired loans with an allowance recorded, Related Allowance | 201 |
Impaired loans with an allowance recorded, Interest Income Recognized | 7 |
Total impaired loans, Recorded Investment | 1,716 | 584
Total impaired loans, Unpaid Principal Balance |  | 602
Total impaired loans, Average Recorded Investment |  | 811
Total impaired loans, Interest Income Recognized | 17 | 21
Acquisition, Development, and Construction |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired loans with no related allowance, Recorded Investment |  | 389
Impaired loans with no related allowance, Unpaid Principal Balance |  | 1,289
Impaired loans with no related allowance, Average Recorded Investment |  | 3,508
Impaired loans with no related allowance, Interest Income Recognized |  | 364
Total impaired loans, Recorded Investment |  | 389
Total impaired loans, Unpaid Principal Balance |  | 1,289
Total impaired loans, Average Recorded Investment |  | 3,508
Total impaired loans, Interest Income Recognized |  | 364
Other loans |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired loans with no related allowance, Recorded Investment | 29,456 | 37,669
Impaired loans with no related allowance, Unpaid Principal Balance |  | 114,636
Impaired loans with no related allowance, Average Recorded Investment |  | 39,598
Impaired loans with no related allowance, Interest Income Recognized | 651 | 2,494
Impaired loans with an allowance recorded, Recorded Investment |  | 1,445
Impaired loans with an allowance recorded, Unpaid Principal Balance |  | 4,173
Impaired loans with an allowance recorded, Related Allowance |  | 116
Impaired loans with an allowance recorded, Average Recorded Investment |  | 4,111
Impaired loans with an allowance recorded, Interest Income Recognized |  | 13
Total impaired loans, Recorded Investment | 29,456 | 39,114
Total impaired loans, Unpaid Principal Balance |  | 118,809
Total impaired loans, Average Recorded Investment |  | 43,709
Total impaired loans, Interest Income Recognized | $ 651 | $ 2,507

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