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Allowance for Credit Losses (ACL) - Disaggregated analysis of the changes in allowance for credit losses (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Allowance for credit losses      
Balance at beginning of period $ 301,807 $ 457,309 $ 56,927
Charge-offs (23,446) (16,899) (14,602)
Recoveries 19,173 13,800 11,777
Net (charge-offs) recoveries (4,273) (3,099) (2,825)
Provision (recovery) 31,455 (152,403) 89,923
Balance at end of period 356,444 301,807 457,309
Quantitative allowance      
Collectively evaluated 333,438 292,210 415,929
Individually evaluated 14,767 2,464 1,249
Total quantitative allowance 348,205 294,674 417,178
Qualitative allowance 8,239 7,133 40,131
Unfunded Commitment      
Allowance for credit losses      
Provision (recovery) 36,700 (12,900) 43,400
Initial PCD Allowance      
Allowance for credit losses      
Balance at beginning of period   149,404 3,408
Balance at end of period 13,758   149,404
Initial Non PCD Allowance      
Allowance for credit losses      
Balance at end of period 13,697    
Adjustments      
Allowance for credit losses      
Balance at beginning of period     111,365
Adjustments | ASU 2016-13      
Allowance for credit losses      
Balance at beginning of period   109,442 51,030
Balance at end of period     109,442
Residential Mortgage Sr.      
Allowance for credit losses      
Balance at beginning of period 47,036 63,561 6,128
Charge-offs (197) (204) (528)
Recoveries 1,233 1,547 1,143
Net (charge-offs) recoveries 1,036 1,343 615
Provision (recovery) 22,953 (17,868) 4,310
Balance at end of period 72,188 47,036 63,561
Quantitative allowance      
Collectively evaluated 72,751 45,575 54,656
Individually evaluated 233 150 82
Total quantitative allowance 72,984 45,725 54,738
Qualitative allowance (796) 1,311 8,823
Residential Mortgage Sr. | Initial PCD Allowance      
Allowance for credit losses      
Balance at beginning of period   29,935 406
Balance at end of period 811   29,935
Residential Mortgage Sr. | Initial Non PCD Allowance      
Allowance for credit losses      
Balance at end of period 352    
Residential Mortgage Sr. | Adjustments      
Allowance for credit losses      
Balance at beginning of period     11,989
Residential Mortgage Sr. | Adjustments | ASU 2016-13      
Allowance for credit losses      
Balance at beginning of period   16,712 5,455
Balance at end of period     16,712
Residential Mortgage Jr.      
Allowance for credit losses      
Balance at beginning of period 611 1,238 15
Charge-offs (19)   (24)
Recoveries 231 146 455
Net (charge-offs) recoveries 212 146 431
Provision (recovery) (444) (773) (252)
Balance at end of period 405 611 1,238
Quantitative allowance      
Collectively evaluated 406 611 1,238
Total quantitative allowance 406 611 1,238
Qualitative allowance (1)    
Residential Mortgage Jr. | Initial PCD Allowance      
Allowance for credit losses      
Balance at beginning of period   804 3
Balance at end of period     804
Residential Mortgage Jr. | Initial Non PCD Allowance      
Allowance for credit losses      
Balance at end of period 26    
Residential Mortgage Jr. | Adjustments      
Allowance for credit losses      
Balance at beginning of period     29
Residential Mortgage Jr. | Adjustments | ASU 2016-13      
Allowance for credit losses      
Balance at beginning of period   226 11
Balance at end of period     226
HELOC      
Allowance for credit losses      
Balance at beginning of period 13,325 16,698 4,327
Charge-offs (445) (1,002) (1,053)
Recoveries 3,981 2,256 1,251
Net (charge-offs) recoveries 3,536 1,254 198
Provision (recovery) (2,107) (4,627) (1,311)
Balance at end of period 14,886 13,325 16,698
Quantitative allowance      
Collectively evaluated 12,616 12,954 14,625
Individually evaluated 2,462 91 77
Total quantitative allowance 15,078 13,045 14,702
Qualitative allowance (192) 280 1,996
HELOC | Initial PCD Allowance      
Allowance for credit losses      
Balance at beginning of period   5,119 289
Balance at end of period     5,119
HELOC | Initial Non PCD Allowance      
Allowance for credit losses      
Balance at end of period 132    
HELOC | Adjustments      
Allowance for credit losses      
Balance at beginning of period     8,465
HELOC | Adjustments | ASU 2016-13      
Allowance for credit losses      
Balance at beginning of period   4,227 3,849
Balance at end of period     4,227
Residential Construction      
Allowance for credit losses      
Balance at beginning of period 4,997 4,914 815
Charge-offs (21) (29) (32)
Recoveries 8 60 111
Net (charge-offs) recoveries (13) 31 79
Provision (recovery) 3,988 52 (2,954)
Balance at end of period 8,974 4,997 4,914
Quantitative allowance      
Collectively evaluated 8,800 4,989 4,733
Total quantitative allowance 8,800 4,989 4,733
Qualitative allowance 174 8 181
Residential Construction | Initial PCD Allowance      
Allowance for credit losses      
Balance at beginning of period   1,302  
Balance at end of period     1,302
Residential Construction | Initial Non PCD Allowance      
Allowance for credit losses      
Balance at end of period 2    
Residential Construction | Adjustments      
Allowance for credit losses      
Balance at beginning of period     1,594
Residential Construction | Adjustments | ASU 2016-13      
Allowance for credit losses      
Balance at beginning of period   4,893 779
Balance at end of period     4,893
Other C&D      
Allowance for credit losses      
Balance at beginning of period 37,593 67,197 6,211
Charge-offs (4) (87) (347)
Recoveries 1,104 1,861 1,407
Net (charge-offs) recoveries 1,100 1,774 1,060
Provision (recovery) 4,744 (31,378) 40,279
Balance at end of period 45,410 37,593 67,197
Quantitative allowance      
Collectively evaluated 44,748 37,159 67,188
Individually evaluated 286 434 9
Total quantitative allowance 45,034 37,593 67,197
Qualitative allowance 376    
Other C&D | Initial PCD Allowance      
Allowance for credit losses      
Balance at beginning of period   6,035 351
Balance at end of period 86   6,035
Other C&D | Initial Non PCD Allowance      
Allowance for credit losses      
Balance at end of period 1,887    
Other C&D | Adjustments      
Allowance for credit losses      
Balance at beginning of period     12,150
Other C&D | Adjustments | ASU 2016-13      
Allowance for credit losses      
Balance at beginning of period   7,673 5,588
Balance at end of period     7,673
Consumer      
Allowance for credit losses      
Balance at beginning of period 23,149 26,562 4,350
Charge-offs (10,214) (8,809) (6,158)
Recoveries 2,426 2,075 1,922
Net (charge-offs) recoveries (7,788) (6,734) (4,236)
Provision (recovery) 7,355 3,321 12,333
Balance at end of period 22,767 23,149 26,562
Quantitative allowance      
Collectively evaluated 22,767 21,887 18,435
Individually evaluated     120
Total quantitative allowance 22,767 21,887 18,555
Qualitative allowance   1,262 8,007
Consumer | Initial PCD Allowance      
Allowance for credit losses      
Balance at beginning of period   6,120 669
Balance at end of period     6,120
Consumer | Initial Non PCD Allowance      
Allowance for credit losses      
Balance at end of period 51    
Consumer | Adjustments      
Allowance for credit losses      
Balance at beginning of period     8,509
Consumer | Adjustments | ASU 2016-13      
Allowance for credit losses      
Balance at beginning of period   3,836 3,490
Balance at end of period     3,836
Multifamily      
Allowance for credit losses      
Balance at beginning of period 4,921 7,887 1,557
Recoveries   3 71
Net (charge-offs) recoveries   3 71
Provision (recovery) (1,663) (2,969) 2,657
Balance at end of period 3,684 4,921 7,887
Quantitative allowance      
Collectively evaluated 3,545 4,921 7,887
Total quantitative allowance 3,545 4,921 7,887
Qualitative allowance 139    
Multifamily | Initial PCD Allowance      
Allowance for credit losses      
Balance at beginning of period   902 97
Balance at end of period     902
Multifamily | Initial Non PCD Allowance      
Allowance for credit losses      
Balance at end of period 426    
Multifamily | Adjustments      
Allowance for credit losses      
Balance at beginning of period     3,045
Multifamily | Adjustments | ASU 2016-13      
Allowance for credit losses      
Balance at beginning of period   1,212 1,391
Balance at end of period     1,212
Municipal      
Allowance for credit losses      
Balance at beginning of period 565 1,510 956
Provision (recovery) 284 (945) (2,282)
Balance at end of period 849 565 1,510
Quantitative allowance      
Collectively evaluated 706 565 685
Total quantitative allowance 706 565 685
Qualitative allowance 143   825
Municipal | Initial PCD Allowance      
Allowance for credit losses      
Balance at beginning of period   1,003  
Balance at end of period     1,003
Municipal | Adjustments      
Allowance for credit losses      
Balance at beginning of period     1,870
Municipal | Adjustments | ASU 2016-13      
Allowance for credit losses      
Balance at beginning of period   919 914
Balance at end of period     919
CRE Owner Occupied      
Allowance for credit losses      
Balance at beginning of period 61,794 97,104 10,879
Charge-offs (1,976) (2,052) (1,205)
Recoveries 1,327 970 1,089
Net (charge-offs) recoveries (649) (1,082) (116)
Provision (recovery) (7,990) (34,228) 16,468
Balance at end of period 58,083 61,794 97,104
Quantitative allowance      
Collectively evaluated 48,740 60,353 91,106
Individually evaluated 7,829 590 948
Total quantitative allowance 56,569 60,943 92,054
Qualitative allowance 1,514 851 5,050
CRE Owner Occupied | Initial PCD Allowance      
Allowance for credit losses      
Balance at beginning of period   34,077 898
Balance at end of period 2,409   34,077
CRE Owner Occupied | Initial Non PCD Allowance      
Allowance for credit losses      
Balance at end of period 2,519    
CRE Owner Occupied | Adjustments      
Allowance for credit losses      
Balance at beginning of period     21,282
CRE Owner Occupied | Adjustments | ASU 2016-13      
Allowance for credit losses      
Balance at beginning of period   25,393 9,505
Balance at end of period     25,393
Non Owner Occupied CRE      
Allowance for credit losses      
Balance at beginning of period 79,649 124,421 15,219
Charge-offs (368) (863) (601)
Recoveries 581 1,070 518
Net (charge-offs) recoveries 213 207 (83)
Provision (recovery) (4,074) (44,979) 13,877
Balance at end of period 78,485 79,649 124,421
Quantitative allowance      
Collectively evaluated 74,424 77,494 116,571
Individually evaluated 2,268 196 6
Total quantitative allowance 76,692 77,690 116,577
Qualitative allowance 1,793 1,959 7,844
Non Owner Occupied CRE | Initial PCD Allowance      
Allowance for credit losses      
Balance at beginning of period   45,787 656
Balance at end of period     45,787
Non Owner Occupied CRE | Initial Non PCD Allowance      
Allowance for credit losses      
Balance at end of period 2,697    
Non Owner Occupied CRE | Adjustments      
Allowance for credit losses      
Balance at beginning of period     29,773
Non Owner Occupied CRE | Adjustments | ASU 2016-13      
Allowance for credit losses      
Balance at beginning of period   35,067 13,898
Balance at end of period     35,067
C & I      
Allowance for credit losses      
Balance at beginning of period 28,167 46,217 6,470
Charge-offs (10,202) (3,853) (4,654)
Recoveries 8,282 3,812 3,810
Net (charge-offs) recoveries (1,920) (41) (844)
Provision (recovery) 8,409 (18,009) 6,798
Balance at end of period 50,713 28,167 46,217
Quantitative allowance      
Collectively evaluated 43,935 25,702 38,805
Individually evaluated 1,689 1,003 7
Total quantitative allowance 45,624 26,705 38,812
Qualitative allowance 5,089 1,462 7,405
C & I | Initial PCD Allowance      
Allowance for credit losses      
Balance at beginning of period   18,320 39
Balance at end of period 10,452   18,320
C & I | Initial Non PCD Allowance      
Allowance for credit losses      
Balance at end of period $ 5,605    
C & I | Adjustments      
Allowance for credit losses      
Balance at beginning of period     12,659
C & I | Adjustments | ASU 2016-13      
Allowance for credit losses      
Balance at beginning of period   $ 9,284 6,150
Balance at end of period     $ 9,284