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Loans - Risk Category of Mortgage and Non-mortgage Loans (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022
2023 | $ 243,176 |  | $ 243,176 |  |
2022 | 1,195,602 |  | 1,195,602 |  |
2021 | 750,746 |  | 750,746 |  |
2020 | 571,592 |  | 571,592 |  |
2019 | 749,660 |  | 749,660 |  |
Prior | 2,967,589 |  | 2,967,589 |  |
Revolving Loans Amortized Cost Basis | 347,550 |  | 347,550 |  |
Revolving Loans converted to term loans | 13,135 |  | 13,135 |  |
Total Loans | 6,839,050 |  | 6,839,050 |  | $ 6,934,769
Gross charge-offs |  |  |  |  |
2021 |  |  | 1,675 |  |
2019 |  |  | 8 |  |
Prior |  |  | 79 |  |
Revolving Loans Amortized Cost Basis |  |  | 9,267 |  |
Charge-offs | 1,731 | $ 50 | 11,029 | $ 1,086 |
Basis adjustments | 6,625 |  | 6,625 |  |
Portfolio Layer Hedges on Closed Portfolio of Loans [Member] | Designated as Hedging Instrument [Member] |  |  |  |  |
Gross charge-offs |  |  |  |  |
Basis adjustments | 6,600 |  | 6,600 |  |
Pass |  |  |  |  |
2023 | 242,965 |  | 242,965 |  |
2022 | 1,189,488 |  | 1,189,488 |  |
2021 | 739,067 |  | 739,067 |  |
2020 | 561,511 |  | 561,511 |  |
2019 | 707,433 |  | 707,433 |  |
Prior | 2,809,001 |  | 2,809,001 |  |
Revolving Loans Amortized Cost Basis | 338,726 |  | 338,726 |  |
Revolving Loans converted to term loans | 11,106 |  | 11,106 |  |
Total Loans | 6,599,297 |  | 6,599,297 |  |
Watch |  |  |  |  |
2023 | 211 |  | 211 |  |
2022 | 3,746 |  | 3,746 |  |
2021 | 9,864 |  | 9,864 |  |
2020 | 5,306 |  | 5,306 |  |
2019 | 27,370 |  | 27,370 |  |
Prior | 140,944 |  | 140,944 |  |
Revolving Loans Amortized Cost Basis | 747 |  | 747 |  |
Revolving Loans converted to term loans | 1,413 |  | 1,413 |  |
Total Loans | 189,601 |  | 189,601 |  |
Special Mention |  |  |  |  |
2021 | 1,639 |  | 1,639 |  |
2020 | 4,775 |  | 4,775 |  |
2019 | 14,829 |  | 14,829 |  |
Prior | 3,291 |  | 3,291 |  |
Revolving Loans converted to term loans | 173 |  | 173 |  |
Total Loans | 24,707 |  | 24,707 |  |
Substandard |  |  |  |  |
2022 | 2,368 |  | 2,368 |  |
2021 | 176 |  | 176 |  |
2019 | 28 |  | 28 |  |
Prior | 14,353 |  | 14,353 |  |
Revolving Loans Amortized Cost Basis | 3,375 |  | 3,375 |  |
Revolving Loans converted to term loans | 443 |  | 443 |  |
Total Loans | 20,743 |  | 20,743 |  |
Doubtful |  |  |  |  |
Revolving Loans Amortized Cost Basis | 4,702 |  | 4,702 |  |
Total Loans | 4,702 |  | 4,702 |  |
One-To-Four Family - Residential Portfolio Segment [Member] |  |  |  |  |
2023 | 4,141 |  | 4,141 |  |
2022 | 23,958 |  | 23,958 |  |
2021 | 8,857 |  | 8,857 |  |
2020 | 17,905 |  | 17,905 |  |
2019 | 40,767 |  | 40,767 |  |
Prior | 114,782 |  | 114,782 |  |
Revolving Loans Amortized Cost Basis | 7,670 |  | 7,670 |  |
Revolving Loans converted to term loans | 13,135 |  | 13,135 |  |
Total Loans | 231,215 |  | 231,215 |  | 242,480
Gross charge-offs |  |  |  |  |
Prior |  |  | 12 |  |
Charge-offs | 6 |  | 12 |  |
One-To-Four Family - Residential Portfolio Segment [Member] | Pass |  |  |  |  |
2023 | 4,141 |  | 4,141 |  |
2022 | 23,445 |  | 23,445 |  |
2021 | 8,579 |  | 8,579 |  |
2020 | 17,905 |  | 17,905 |  |
2019 | 40,029 |  | 40,029 |  |
Prior | 108,935 |  | 108,935 |  |
Revolving Loans Amortized Cost Basis | 7,607 |  | 7,607 |  |
Revolving Loans converted to term loans | 11,106 |  | 11,106 |  |
Total Loans | 221,747 |  | 221,747 |  |
One-To-Four Family - Residential Portfolio Segment [Member] | Watch |  |  |  |  |
2022 | 513 |  | 513 |  |
2021 | 278 |  | 278 |  |
2019 | 738 |  | 738 |  |
Prior | 1,607 |  | 1,607 |  |
Revolving Loans Amortized Cost Basis | 63 |  | 63 |  |
Revolving Loans converted to term loans | 1,413 |  | 1,413 |  |
Total Loans | 4,612 |  | 4,612 |  |
One-To-Four Family - Residential Portfolio Segment [Member] | Special Mention |  |  |  |  |
Revolving Loans converted to term loans | 173 |  | 173 |  |
Total Loans | 173 |  | 173 |  |
One-To-Four Family - Residential Portfolio Segment [Member] | Substandard |  |  |  |  |
Prior | 4,240 |  | 4,240 |  |
Revolving Loans converted to term loans | 443 |  | 443 |  |
Total Loans | 4,683 |  | 4,683 |  |
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] |  |  |  |  |
2023 | 12,297 |  | 12,297 |  |
2022 | 44,290 |  | 44,290 |  |
2021 | 42,386 |  | 42,386 |  |
2020 | 32,058 |  | 32,058 |  |
2019 | 63,224 |  | 63,224 |  |
Prior | 350,967 |  | 350,967 |  |
Total Loans | 545,222 |  | 545,222 |  | 557,295
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Pass |  |  |  |  |
2023 | 12,297 |  | 12,297 |  |
2022 | 44,290 |  | 44,290 |  |
2021 | 42,386 |  | 42,386 |  |
2020 | 32,058 |  | 32,058 |  |
2019 | 63,224 |  | 63,224 |  |
Prior | 343,763 |  | 343,763 |  |
Total Loans | 538,018 |  | 538,018 |  |
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Watch |  |  |  |  |
Prior | 5,786 |  | 5,786 |  |
Total Loans | 5,786 |  | 5,786 |  |
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Special Mention |  |  |  |  |
Prior | 450 |  | 450 |  |
Total Loans | 450 |  | 450 |  |
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Substandard |  |  |  |  |
Prior | 968 |  | 968 |  |
Total Loans | 968 |  | 968 |  |
Commercial Real Estate [Member] |  |  |  |  |
2023 | 59,422 |  | 59,422 |  |
2022 | 327,888 |  | 327,888 |  |
2021 | 180,219 |  | 180,219 |  |
2020 | 149,773 |  | 149,773 |  |
2019 | 231,647 |  | 231,647 |  |
Prior | 968,045 |  | 968,045 |  |
Total Loans | 1,916,994 |  | 1,916,994 |  | 1,914,898
Gross charge-offs |  |  |  |  |
Prior |  |  | 8 |  |
Charge-offs | 8 |  | 8 |  |
Commercial Real Estate [Member] | Pass |  |  |  |  |
2023 | 59,422 |  | 59,422 |  |
2022 | 325,928 |  | 325,928 |  |
2021 | 178,735 |  | 178,735 |  |
2020 | 149,773 |  | 149,773 |  |
2019 | 222,077 |  | 222,077 |  |
Prior | 948,085 |  | 948,085 |  |
Total Loans | 1,884,020 |  | 1,884,020 |  |
Commercial Real Estate [Member] | Watch |  |  |  |  |
2022 | 1,960 |  | 1,960 |  |
2021 | 1,484 |  | 1,484 |  |
2019 | 9,570 |  | 9,570 |  |
Prior | 19,783 |  | 19,783 |  |
Total Loans | 32,797 |  | 32,797 |  |
Commercial Real Estate [Member] | Special Mention |  |  |  |  |
Prior | 177 |  | 177 |  |
Total Loans | 177 |  | 177 |  |
Construction Portfolio Segment |  |  |  |  |
2023 | 4,357 |  | 4,357 |  |
2022 | 3 |  | 3 |  |
2021 | 10,186 |  | 10,186 |  |
Revolving Loans Amortized Cost Basis | 42,659 |  | 42,659 |  |
Total Loans | 57,205 |  | 57,205 |  | 70,824
Construction Portfolio Segment | Pass |  |  |  |  |
2023 | 4,357 |  | 4,357 |  |
2022 | 3 |  | 3 |  |
2021 | 10,186 |  | 10,186 |  |
Revolving Loans Amortized Cost Basis | 42,659 |  | 42,659 |  |
Total Loans | 57,205 |  | 57,205 |  |
Multi-family Residential Portfolio Segment [Member] |  |  |  |  |
2023 | 89,777 |  | 89,777 |  |
2022 | 478,367 |  | 478,367 |  |
2021 | 283,598 |  | 283,598 |  |
2020 | 221,810 |  | 221,810 |  |
2019 | 308,790 |  | 308,790 |  |
Prior | 1,211,558 |  | 1,211,558 |  |
Revolving Loans Amortized Cost Basis | 3,564 |  | 3,564 |  |
Total Loans | 2,597,464 |  | 2,597,464 |  | 2,605,172
Multi-family Residential Portfolio Segment [Member] | Pass |  |  |  |  |
2023 | 89,777 |  | 89,777 |  |
2022 | 477,475 |  | 477,475 |  |
2021 | 283,598 |  | 283,598 |  |
2020 | 218,950 |  | 218,950 |  |
2019 | 308,790 |  | 308,790 |  |
Prior | 1,178,081 |  | 1,178,081 |  |
Revolving Loans Amortized Cost Basis | 3,564 |  | 3,564 |  |
Total Loans | 2,560,235 |  | 2,560,235 |  |
Multi-family Residential Portfolio Segment [Member] | Watch |  |  |  |  |
2022 | 892 |  | 892 |  |
2020 | 2,860 |  | 2,860 |  |
Prior | 28,246 |  | 28,246 |  |
Total Loans | 31,998 |  | 31,998 |  |
Multi-family Residential Portfolio Segment [Member] | Special Mention |  |  |  |  |
Prior | 873 |  | 873 |  |
Total Loans | 873 |  | 873 |  |
Multi-family Residential Portfolio Segment [Member] | Substandard |  |  |  |  |
Prior | 4,358 |  | 4,358 |  |
Total Loans | 4,358 |  | 4,358 |  |
Commercial Business Secured By Portfolio Segment [member] |  |  |  |  |
2023 | 21,100 |  | 21,100 |  |
2022 | 179,716 |  | 179,716 |  |
2021 | 132,943 |  | 132,943 |  |
2020 | 107,726 |  | 107,726 |  |
2019 | 55,981 |  | 55,981 |  |
Prior | 207,002 |  | 207,002 |  |
Total Loans | 704,468 |  | 704,468 |  |
Commercial Business Secured By Portfolio Segment [member] | Pass |  |  |  |  |
2023 | 21,100 |  | 21,100 |  |
2022 | 179,716 |  | 179,716 |  |
2021 | 132,943 |  | 132,943 |  |
2020 | 107,726 |  | 107,726 |  |
2019 | 40,571 |  | 40,571 |  |
Prior | 147,446 |  | 147,446 |  |
Total Loans | 629,502 |  | 629,502 |  |
Commercial Business Secured By Portfolio Segment [member] | Watch |  |  |  |  |
2019 | 610 |  | 610 |  |
Prior | 59,556 |  | 59,556 |  |
Total Loans | 60,166 |  | 60,166 |  |
Commercial Business Secured By Portfolio Segment [member] | Special Mention |  |  |  |  |
2019 | 14,800 |  | 14,800 |  |
Total Loans | 14,800 |  | 14,800 |  |
Commercial Business Portfolio Segment [Member] |  |  |  |  |
2023 | 51,268 |  | 51,268 |  |
2022 | 138,062 |  | 138,062 |  |
2021 | 87,540 |  | 87,540 |  |
2020 | 38,601 |  | 38,601 |  |
2019 | 48,512 |  | 48,512 |  |
Prior | 106,412 |  | 106,412 |  |
Revolving Loans Amortized Cost Basis | 293,567 |  | 293,567 |  |
Total Loans | 763,962 |  | 763,962 |  |
Gross charge-offs |  |  |  |  |
2021 |  |  | 1,675 |  |
2019 |  |  | 8 |  |
Prior |  |  | 10 |  |
Revolving Loans Amortized Cost Basis |  |  | 9,267 |  |
Charge-offs |  |  | 10,960 |  |
Commercial Business Portfolio Segment [Member] | Pass |  |  |  |  |
2023 | 51,057 |  | 51,057 |  |
2022 | 135,313 |  | 135,313 |  |
2021 | 79,438 |  | 79,438 |  |
2020 | 31,380 |  | 31,380 |  |
2019 | 32,052 |  | 32,052 |  |
Prior | 78,303 |  | 78,303 |  |
Revolving Loans Amortized Cost Basis | 284,806 |  | 284,806 |  |
Total Loans | 692,349 |  | 692,349 |  |
Commercial Business Portfolio Segment [Member] | Watch |  |  |  |  |
2023 | 211 |  | 211 |  |
2022 | 381 |  | 381 |  |
2021 | 8,102 |  | 8,102 |  |
2020 | 2,446 |  | 2,446 |  |
2019 | 16,403 |  | 16,403 |  |
Prior | 22,728 |  | 22,728 |  |
Revolving Loans Amortized Cost Basis | 684 |  | 684 |  |
Total Loans | 50,955 |  | 50,955 |  |
Commercial Business Portfolio Segment [Member] | Special Mention |  |  |  |  |
2020 | 4,775 |  | 4,775 |  |
2019 | 29 |  | 29 |  |
Prior | 1,757 |  | 1,757 |  |
Total Loans | 6,561 |  | 6,561 |  |
Commercial Business Portfolio Segment [Member] | Substandard |  |  |  |  |
2022 | 2,368 |  | 2,368 |  |
2019 | 28 |  | 28 |  |
Prior | 3,624 |  | 3,624 |  |
Revolving Loans Amortized Cost Basis | 3,375 |  | 3,375 |  |
Total Loans | 9,395 |  | 9,395 |  |
Commercial Business Portfolio Segment [Member] | Doubtful |  |  |  |  |
Revolving Loans Amortized Cost Basis | 4,702 |  | 4,702 |  |
Total Loans | 4,702 |  | 4,702 |  |
Small Business Administration Portfolio Segment [Member] |  |  |  |  |
2023 | 814 |  | 814 |  |
2022 | 3,318 |  | 3,318 |  |
2021 | 5,017 |  | 5,017 |  |
2020 | 3,719 |  | 3,719 |  |
2019 | 739 |  | 739 |  |
Prior | 8,706 |  | 8,706 |  |
Total Loans | 22,313 |  | 22,313 |  | 23,193
Gross charge-offs |  |  |  |  |
Prior |  |  | 7 |  |
Charge-offs | 1 | $ 26 | 7 | $ 1,054 |
Small Business Administration Portfolio Segment [Member] | Pass |  |  |  |  |
2023 | 814 |  | 814 |  |
2022 | 3,318 |  | 3,318 |  |
2021 | 3,202 |  | 3,202 |  |
2020 | 3,719 |  | 3,719 |  |
2019 | 690 |  | 690 |  |
Prior | 4,271 |  | 4,271 |  |
Total Loans | 16,014 |  | 16,014 |  |
Small Business Administration Portfolio Segment [Member] | Watch |  |  |  |  |
2019 | 49 |  | 49 |  |
Prior | 3,238 |  | 3,238 |  |
Total Loans | 3,287 |  | 3,287 |  |
Small Business Administration Portfolio Segment [Member] | Special Mention |  |  |  |  |
2021 | 1,639 |  | 1,639 |  |
Prior | 34 |  | 34 |  |
Total Loans | 1,673 |  | 1,673 |  |
Small Business Administration Portfolio Segment [Member] | Substandard |  |  |  |  |
2021 | 176 |  | 176 |  |
Prior | 1,163 |  | 1,163 |  |
Total Loans | 1,339 |  | 1,339 |  |
Other Portfolio Segment [Member] |  |  |  |  |
Prior | 117 |  | 117 |  |
Revolving Loans Amortized Cost Basis | 90 |  | 90 |  |
Total Loans | 207 |  | 207 |  |
Gross charge-offs |  |  |  |  |
Prior |  |  | 42 |  |
Charge-offs |  |  | 42 |  |
Other Portfolio Segment [Member] | Pass |  |  |  |  |
Prior | 117 |  | 117 |  |
Revolving Loans Amortized Cost Basis | 90 |  | 90 |  |
Total Loans | 207 |  | 207 |  |
Consumer Portfolio Segment [Member] |  |  |  |  |
Mortgage loans in process of foreclosure, amount | $ 5,700 |  | $ 5,700 |  | $ 5,200

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