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Loans Receivable, Net - Credit Grades and Risk Characteristics (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
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Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing receivable, year one, originated, current fiscal year | $ 1,699,020 | $ 1,496,628
Financing receivable, year two, originated, fiscal year before current fiscal year | 1,264,571 | 1,313,707
Financing receivable, year three, originated, two years before current fiscal year | 1,097,563 | 817,607
Financing receivable, year four, originated, three years before current fiscal year | 644,593 | 800,731
Financing receivable, year five, originated, four years before current fiscal year | 665,746 | 620,952
Financing receivable, originated, more than five years before current fiscal year | 2,327,015 | 2,340,571
Financing receivable, revolving | 483,324 | 365,910
Total | 8,181,832 | 7,756,106
Commercial and industrial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing receivable, year one, originated, current fiscal year | 67,130 | 137,993
Financing receivable, year two, originated, fiscal year before current fiscal year | 26,625 | 42,604
Financing receivable, year three, originated, two years before current fiscal year | 30,510 | 30,036
Financing receivable, year four, originated, three years before current fiscal year | 19,075 | 21,076
Financing receivable, year five, originated, four years before current fiscal year | 10,509 | 34,914
Financing receivable, originated, more than five years before current fiscal year | 75,593 | 61,163
Financing receivable, revolving | 228,232 | 142,870
Total | 457,674 | 470,656
Commercial and industrial | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing receivable, year one, originated, current fiscal year | 67,130 | 137,262
Financing receivable, year two, originated, fiscal year before current fiscal year | 25,950 | 40,737
Financing receivable, year three, originated, two years before current fiscal year | 27,728 | 27,967
Financing receivable, year four, originated, three years before current fiscal year | 17,799 | 18,845
Financing receivable, year five, originated, four years before current fiscal year | 10,361 | 33,568
Financing receivable, originated, more than five years before current fiscal year | 74,014 | 59,339
Financing receivable, revolving | 220,570 | 134,140
Total | 443,552 | 451,858
Commercial and industrial | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing receivable, year one, originated, current fiscal year | 0 | 150
Financing receivable, year two, originated, fiscal year before current fiscal year | 72 | 583
Financing receivable, year three, originated, two years before current fiscal year | 240 | 826
Financing receivable, year four, originated, three years before current fiscal year | 438 | 1,422
Financing receivable, year five, originated, four years before current fiscal year | 96 | 907
Financing receivable, originated, more than five years before current fiscal year | 601 | 118
Financing receivable, revolving | 2,797 | 1,429
Total | 4,244 | 5,435
Commercial and industrial | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing receivable, year one, originated, current fiscal year | 0 | 581
Financing receivable, year two, originated, fiscal year before current fiscal year | 603 | 1,284
Financing receivable, year three, originated, two years before current fiscal year | 2,542 | 1,243
Financing receivable, year four, originated, three years before current fiscal year | 838 | 809
Financing receivable, year five, originated, four years before current fiscal year | 52 | 439
Financing receivable, originated, more than five years before current fiscal year | 978 | 1,706
Financing receivable, revolving | 4,865 | 7,301
Total | 9,878 | 13,363
Commercial real estate – owner occupied |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing receivable, year one, originated, current fiscal year | 84,621 | 96,888
Financing receivable, year two, originated, fiscal year before current fiscal year | 77,638 | 152,688
Financing receivable, year three, originated, two years before current fiscal year | 141,689 | 140,203
Financing receivable, year four, originated, three years before current fiscal year | 136,694 | 128,477
Financing receivable, year five, originated, four years before current fiscal year | 119,251 | 125,056
Financing receivable, originated, more than five years before current fiscal year | 549,766 | 481,743
Financing receivable, revolving | 14,314 | 20,010
Total | 1,123,973 | 1,145,065
Commercial real estate – owner occupied | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing receivable, year one, originated, current fiscal year | 84,621 | 96,888
Financing receivable, year two, originated, fiscal year before current fiscal year | 74,192 | 114,506
Financing receivable, year three, originated, two years before current fiscal year | 126,131 | 122,962
Financing receivable, year four, originated, three years before current fiscal year | 124,268 | 124,050
Financing receivable, year five, originated, four years before current fiscal year | 112,848 | 104,264
Financing receivable, originated, more than five years before current fiscal year | 496,831 | 428,423
Financing receivable, revolving | 13,056 | 18,932
Total | 1,031,947 | 1,010,025
Commercial real estate – owner occupied | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing receivable, year one, originated, current fiscal year | 0 | 0
Financing receivable, year two, originated, fiscal year before current fiscal year | 0 | 3,512
Financing receivable, year three, originated, two years before current fiscal year | 2,958 | 8,240
Financing receivable, year four, originated, three years before current fiscal year | 4,010 | 1,023
Financing receivable, year five, originated, four years before current fiscal year | 696 | 17,115
Financing receivable, originated, more than five years before current fiscal year | 15,761 | 17,811
Financing receivable, revolving | 203 | 439
Total | 23,628 | 48,140
Commercial real estate – owner occupied | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing receivable, year one, originated, current fiscal year | 0 | 0
Financing receivable, year two, originated, fiscal year before current fiscal year | 3,446 | 34,670
Financing receivable, year three, originated, two years before current fiscal year | 12,600 | 9,001
Financing receivable, year four, originated, three years before current fiscal year | 8,416 | 3,404
Financing receivable, year five, originated, four years before current fiscal year | 5,707 | 3,677
Financing receivable, originated, more than five years before current fiscal year | 37,174 | 35,509
Financing receivable, revolving | 1,055 | 639
Total | 68,398 | 86,900
Commercial real estate – investor |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing receivable, year one, originated, current fiscal year | 878,697 | 640,241
Financing receivable, year two, originated, fiscal year before current fiscal year | 629,083 | 653,631
Financing receivable, year three, originated, two years before current fiscal year | 588,774 | 336,148
Financing receivable, year four, originated, three years before current fiscal year | 284,762 | 458,715
Financing receivable, year five, originated, four years before current fiscal year | 396,844 | 297,584
Financing receivable, originated, more than five years before current fiscal year | 904,045 | 904,260
Financing receivable, revolving | 240,778 | 200,885
Total | 3,922,983 | 3,491,464
Commercial real estate – investor | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing receivable, year one, originated, current fiscal year | 878,697 | 635,930
Financing receivable, year two, originated, fiscal year before current fiscal year | 624,794 | 628,435
Financing receivable, year three, originated, two years before current fiscal year | 535,828 | 317,104
Financing receivable, year four, originated, three years before current fiscal year | 274,668 | 426,268
Financing receivable, year five, originated, four years before current fiscal year | 382,965 | 281,876
Financing receivable, originated, more than five years before current fiscal year | 844,970 | 812,062
Financing receivable, revolving | 237,610 | 194,913
Total | 3,779,532 | 3,296,588
Commercial real estate – investor | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing receivable, year one, originated, current fiscal year | 0 | 0
Financing receivable, year two, originated, fiscal year before current fiscal year | 0 | 15,979
Financing receivable, year three, originated, two years before current fiscal year | 23,822 | 17,113
Financing receivable, year four, originated, three years before current fiscal year | 9,409 | 15,225
Financing receivable, year five, originated, four years before current fiscal year | 5,223 | 4,234
Financing receivable, originated, more than five years before current fiscal year | 29,565 | 55,872
Financing receivable, revolving | 0 | 149
Total | 68,019 | 108,572
Commercial real estate – investor | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing receivable, year one, originated, current fiscal year | 0 | 4,311
Financing receivable, year two, originated, fiscal year before current fiscal year | 4,289 | 9,217
Financing receivable, year three, originated, two years before current fiscal year | 29,124 | 1,931
Financing receivable, year four, originated, three years before current fiscal year | 685 | 17,222
Financing receivable, year five, originated, four years before current fiscal year | 8,656 | 11,474
Financing receivable, originated, more than five years before current fiscal year | 29,510 | 36,326
Financing receivable, revolving | 3,168 | 5,823
Total | 75,432 | 86,304
Consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 2,677,202 | 2,648,921
Consumer | Residential real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing receivable, year one, originated, current fiscal year | 648,364 | 596,552
Financing receivable, year two, originated, fiscal year before current fiscal year | 510,209 | 438,125
Financing receivable, year three, originated, two years before current fiscal year | 317,605 | 227,924
Financing receivable, year four, originated, three years before current fiscal year | 145,652 | 166,994
Financing receivable, year five, originated, four years before current fiscal year | 120,212 | 146,683
Financing receivable, originated, more than five years before current fiscal year | 659,198 | 733,181
Financing receivable, revolving | 0 | 0
Total | 2,401,240 | 2,309,459
Consumer | Consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing receivable, year one, originated, current fiscal year | 20,208 | 24,954
Financing receivable, year two, originated, fiscal year before current fiscal year | 21,016 | 26,659
Financing receivable, year three, originated, two years before current fiscal year | 18,985 | 83,296
Financing receivable, year four, originated, three years before current fiscal year | 58,410 | 25,469
Financing receivable, year five, originated, four years before current fiscal year | 18,930 | 16,715
Financing receivable, originated, more than five years before current fiscal year | 138,413 | 160,224
Financing receivable, revolving | 0 | 2,145
Total | 275,962 | 339,462
Consumer | Pass | Residential real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing receivable, year one, originated, current fiscal year | 648,364 | 595,982
Financing receivable, year two, originated, fiscal year before current fiscal year | 509,408 | 437,593
Financing receivable, year three, originated, two years before current fiscal year | 317,460 | 226,435
Financing receivable, year four, originated, three years before current fiscal year | 145,652 | 166,773
Financing receivable, year five, originated, four years before current fiscal year | 119,991 | 146,237
Financing receivable, originated, more than five years before current fiscal year | 655,803 | 729,037
Financing receivable, revolving | 0 | 0
Total | 2,396,678 | 2,302,057
Consumer | Pass | Consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing receivable, year one, originated, current fiscal year | 20,208 | 24,954
Financing receivable, year two, originated, fiscal year before current fiscal year | 21,016 | 26,659
Financing receivable, year three, originated, two years before current fiscal year | 18,985 | 83,296
Financing receivable, year four, originated, three years before current fiscal year | 58,392 | 25,469
Financing receivable, year five, originated, four years before current fiscal year | 18,930 | 16,565
Financing receivable, originated, more than five years before current fiscal year | 135,436 | 156,276
Financing receivable, revolving | 0 | 2,145
Total | 272,967 | 335,364
Consumer | Special Mention | Residential real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing receivable, year one, originated, current fiscal year | 0 | 0
Financing receivable, year two, originated, fiscal year before current fiscal year | 801 | 532
Financing receivable, year three, originated, two years before current fiscal year | 145 | 0
Financing receivable, year four, originated, three years before current fiscal year | 0 | 0
Financing receivable, year five, originated, four years before current fiscal year | 0 | 446
Financing receivable, originated, more than five years before current fiscal year | 1,481 | 2,186
Financing receivable, revolving | 0 | 0
Total | 2,427 | 3,164
Consumer | Special Mention | Consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing receivable, year one, originated, current fiscal year | 0 | 0
Financing receivable, year two, originated, fiscal year before current fiscal year | 0 | 0
Financing receivable, year three, originated, two years before current fiscal year | 0 | 0
Financing receivable, year four, originated, three years before current fiscal year | 0 | 0
Financing receivable, year five, originated, four years before current fiscal year | 0 | 150
Financing receivable, originated, more than five years before current fiscal year | 369 | 382
Financing receivable, revolving | 0 | 0
Total | 369 | 532
Consumer | Substandard | Residential real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing receivable, year one, originated, current fiscal year | 0 | 570
Financing receivable, year two, originated, fiscal year before current fiscal year | 0 | 0
Financing receivable, year three, originated, two years before current fiscal year | 0 | 1,489
Financing receivable, year four, originated, three years before current fiscal year | 0 | 221
Financing receivable, year five, originated, four years before current fiscal year | 221 | 0
Financing receivable, originated, more than five years before current fiscal year | 1,914 | 1,958
Financing receivable, revolving | 0 | 0
Total | 2,135 | 4,238
Consumer | Substandard | Consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing receivable, year one, originated, current fiscal year | 0 | 0
Financing receivable, year two, originated, fiscal year before current fiscal year | 0 | 0
Financing receivable, year three, originated, two years before current fiscal year | 0 | 0
Financing receivable, year four, originated, three years before current fiscal year | 18 | 0
Financing receivable, year five, originated, four years before current fiscal year | 0 | 0
Financing receivable, originated, more than five years before current fiscal year | 2,608 | 3,566
Financing receivable, revolving | 0 | 0
Total | $ 2,626 | $ 3,566

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