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Bank segment - Credit risk profile - payment activity and assigned grades (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
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Credit risk profile by internally assigned grade for loans |  |
Current Year | $ 956,609 | $ 1,339,586
One Year before Current Year | 965,198 | 590,363
Two Years before Current Year | 427,762 | 382,648
Three Years before Current Year | 269,681 | 335,784
Four Years before Current Year | 251,518 | 368,904
Prior | 1,221,251 | 1,172,236
Revolving | 978,579 | 1,093,287
Converted to term loans | 62,986 | 62,418
Total | 5,133,584 | 5,345,226
Real estate |  |
Credit risk profile by internally assigned grade for loans |  |
Total | 4,252,590 | 4,239,745
Real estate | Residential 1-4 family |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 541,140 | 567,282
One Year before Current Year | 472,035 | 219,464
Two Years before Current Year | 154,653 | 111,243
Three Years before Current Year | 76,251 | 204,269
Four Years before Current Year | 142,235 | 184,888
Prior | 785,759 | 857,093
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 2,172,073 | 2,144,239
Real estate | Home equity line of credit |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 0 | 0
One Year before Current Year | 0 | 0
Two Years before Current Year | 0 | 0
Three Years before Current Year | 0 | 0
Four Years before Current Year | 0 | 0
Prior | 0 | 0
Revolving | 810,828 | 929,388
Converted to term loans | 40,588 | 34,190
Total | 851,416 | 963,578
Real estate | Residential land |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 8,905 | 8,357
One Year before Current Year | 7,341 | 3,427
Two Years before Current Year | 1,659 | 1,598
Three Years before Current Year | 647 | 939
Four Years before Current Year | 268 | 22
Prior | 579 | 1,274
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 19,399 | 15,617
Real estate | Residential construction |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 4,664 | 6,919
One Year before Current Year | 4,238 | 3,093
Two Years before Current Year | 0 | 385
Three Years before Current Year | 0 | 625
Four Years before Current Year | 268 | 0
Prior | 0 | 0
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 9,170 | 11,022
Real estate | Commercial real estate |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 144,337 | 280,864
One Year before Current Year | 283,178 | 114,426
Two Years before Current Year | 111,545 | 124,301
Three Years before Current Year | 108,493 | 64,087
Four Years before Current Year | 80,689 | 127,799
Prior | 351,286 | 261,388
Revolving | 11,288 | 11,000
Converted to term loans | 0 | 0
Total | 1,090,816 | 983,865
Real estate | Commercial construction |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 11,225 | 16,390
One Year before Current Year | 39,137 | 31,965
Two Years before Current Year | 25,913 | 26,990
Three Years before Current Year | 11,342 | 18,000
Four Years before Current Year | 0 | 5,562
Prior | 0 | 0
Revolving | 22,099 | 22,517
Converted to term loans | 0 | 0
Total | 109,716 | 121,424
Consumer |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 27,318 | 29,546
One Year before Current Year | 19,012 | 69,325
Two Years before Current Year | 39,833 | 38,635
Three Years before Current Year | 17,016 | 7,646
Four Years before Current Year | 1,015 | 307
Prior | 283 | 348
Revolving | 14,081 | 18,848
Converted to term loans | 4,098 | 4,078
Total | 122,656 | 168,733
Commercial |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 219,020 | 430,228
One Year before Current Year | 140,257 | 148,663
Two Years before Current Year | 94,159 | 79,496
Three Years before Current Year | 55,932 | 40,218
Four Years before Current Year | 27,043 | 50,326
Prior | 83,344 | 52,133
Revolving | 120,283 | 111,534
Converted to term loans | 18,300 | 24,150
Total | 758,338 | 936,748
Pass | Real estate | Commercial real estate |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 142,977 | 270,603
One Year before Current Year | 278,941 | 63,301
Two Years before Current Year | 62,907 | 62,168
Three Years before Current Year | 60,174 | 28,432
Four Years before Current Year | 55,824 | 55,089
Prior | 257,110 | 155,654
Revolving | 11,288 | 11,000
Converted to term loans | 0 | 0
Total | 869,221 | 646,247
Pass | Real estate | Commercial construction |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 11,225 | 14,480
One Year before Current Year | 39,137 | 31,965
Two Years before Current Year | 25,913 | 26,990
Three Years before Current Year | 11,342 | 0
Four Years before Current Year | 0 | 5,562
Prior | 0 | 0
Revolving | 22,099 | 22,517
Converted to term loans | 0 | 0
Total | 109,716 | 101,514
Pass | Commercial |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 218,541 | 392,088
One Year before Current Year | 112,545 | 117,791
Two Years before Current Year | 78,076 | 75,533
Three Years before Current Year | 53,829 | 29,211
Four Years before Current Year | 19,043 | 12,520
Prior | 60,661 | 35,770
Revolving | 93,979 | 74,520
Converted to term loans | 16,334 | 11,004
Total | 653,008 | 748,437
Special Mention | Real estate | Commercial real estate |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 1,360 | 10,261
One Year before Current Year | 4,237 | 36,405
Two Years before Current Year | 34,617 | 57,952
Three Years before Current Year | 46,447 | 33,763
Four Years before Current Year | 23,027 | 68,287
Prior | 42,850 | 48,094
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 152,538 | 254,762
Special Mention | Real estate | Commercial construction |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 0 | 1,910
One Year before Current Year | 0 | 0
Two Years before Current Year | 0 | 0
Three Years before Current Year | 0 | 18,000
Four Years before Current Year | 0 | 0
Prior | 0 | 0
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 0 | 19,910
Special Mention | Commercial |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 52 | 37,836
One Year before Current Year | 27,498 | 23,087
Two Years before Current Year | 11,810 | 1,920
Three Years before Current Year | 279 | 6,990
Four Years before Current Year | 2,682 | 30,264
Prior | 19,495 | 13,250
Revolving | 20,459 | 31,362
Converted to term loans | 21 | 11,218
Total | 82,296 | 155,927
Substandard | Real estate | Commercial real estate |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 0 | 0
One Year before Current Year | 0 | 14,720
Two Years before Current Year | 14,021 | 4,181
Three Years before Current Year | 1,872 | 1,892
Four Years before Current Year | 1,838 | 4,423
Prior | 51,326 | 57,640
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 69,057 | 82,856
Substandard | Real estate | Commercial construction |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 0 | 0
One Year before Current Year | 0 | 0
Two Years before Current Year | 0 | 0
Three Years before Current Year | 0 | 0
Four Years before Current Year | 0 | 0
Prior | 0 | 0
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 0 | 0
Substandard | Commercial |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 427 | 304
One Year before Current Year | 214 | 7,785
Two Years before Current Year | 4,273 | 2,043
Three Years before Current Year | 1,824 | 4,017
Four Years before Current Year | 5,318 | 7,542
Prior | 3,188 | 3,113
Revolving | 5,845 | 5,265
Converted to term loans | 1,945 | 1,928
Total | 23,034 | 31,997
Doubtful | Real estate | Commercial real estate |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 0 | 0
One Year before Current Year | 0 | 0
Two Years before Current Year | 0 | 0
Three Years before Current Year | 0 | 0
Four Years before Current Year | 0 | 0
Prior | 0 | 0
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 0 | 0
Doubtful | Real estate | Commercial construction |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 0 | 0
One Year before Current Year | 0 | 0
Two Years before Current Year | 0 | 0
Three Years before Current Year | 0 | 0
Four Years before Current Year | 0 | 0
Prior | 0 | 0
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 0 | 0
Doubtful | Commercial |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 0 | 0
One Year before Current Year | 0 | 0
Two Years before Current Year | 0 | 0
Three Years before Current Year | 0 | 0
Four Years before Current Year | 0 | 0
Prior | 0 | 0
Revolving | 0 | 387
Converted to term loans | 0 | 0
Total | 0 | 387
Current | Real estate | Residential 1-4 family |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 541,140 | 567,282
One Year before Current Year | 471,759 | 218,988
Two Years before Current Year | 150,704 | 111,243
Three Years before Current Year | 75,827 | 203,916
Four Years before Current Year | 142,235 | 184,888
Prior | 778,048 | 849,788
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 2,159,713 | 2,136,105
Current | Real estate | Home equity line of credit |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 0 | 0
One Year before Current Year | 0 | 0
Two Years before Current Year | 0 | 0
Three Years before Current Year | 0 | 0
Four Years before Current Year | 0 | 0
Prior | 0 | 0
Revolving | 809,566 | 927,106
Converted to term loans | 39,932 | 33,228
Total | 849,498 | 960,334
Current | Real estate | Residential land |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 8,905 | 8,357
One Year before Current Year | 7,341 | 3,427
Two Years before Current Year | 1,659 | 1,598
Three Years before Current Year | 647 | 939
Four Years before Current Year | 268 | 22
Prior | 182 | 272
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 19,002 | 14,615
Current | Real estate | Residential construction |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 4,664 | 6,919
One Year before Current Year | 4,238 | 3,093
Two Years before Current Year | 0 | 385
Three Years before Current Year | 0 | 625
Four Years before Current Year | 268 | 0
Prior | 0 | 0
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 9,170 | 11,022
Current | Consumer |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 27,059 | 28,818
One Year before Current Year | 18,662 | 67,159
Two Years before Current Year | 38,546 | 37,072
Three Years before Current Year | 16,378 | 7,207
Four Years before Current Year | 907 | 293
Prior | 283 | 348
Revolving | 13,745 | 18,351
Converted to term loans | 3,819 | 3,758
Total | 119,399 | 163,006
30-59 days past due |  |
Credit risk profile by internally assigned grade for loans |  |
Total | 4,940 | 7,394
30-59 days past due | Real estate | Residential 1-4 family |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 0 | 0
One Year before Current Year | 0 | 0
Two Years before Current Year | 0 | 0
Three Years before Current Year | 0 | 0
Four Years before Current Year | 0 | 0
Prior | 2,224 | 2,629
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 2,224 | 2,629
30-59 days past due | Real estate | Home equity line of credit |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 0 | 0
One Year before Current Year | 0 | 0
Two Years before Current Year | 0 | 0
Three Years before Current Year | 0 | 0
Four Years before Current Year | 0 | 0
Prior | 0 | 0
Revolving | 126 | 552
Converted to term loans | 129 | 298
Total | 255 | 850
30-59 days past due | Real estate | Residential land |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 0 | 0
One Year before Current Year | 0 | 0
Two Years before Current Year | 0 | 0
Three Years before Current Year | 0 | 0
Four Years before Current Year | 0 | 0
Prior | 97 | 702
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 97 | 702
30-59 days past due | Real estate | Residential construction |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 0 | 0
One Year before Current Year | 0 | 0
Two Years before Current Year | 0 | 0
Three Years before Current Year | 0 | 0
Four Years before Current Year | 0 | 0
Prior | 0 | 0
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 0 | 0
30-59 days past due | Real estate | Commercial real estate |  |
Credit risk profile by internally assigned grade for loans |  |
Total | 0 | 0
30-59 days past due | Real estate | Commercial construction |  |
Credit risk profile by internally assigned grade for loans |  |
Total | 0 | 0
30-59 days past due | Consumer |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 206 | 406
One Year before Current Year | 152 | 1,085
Two Years before Current Year | 523 | 727
Three Years before Current Year | 282 | 155
Four Years before Current Year | 21 | 4
Prior | 0 | 0
Revolving | 126 | 138
Converted to term loans | 117 | 90
Total | 1,427 | 2,605
30-59 days past due | Commercial |  |
Credit risk profile by internally assigned grade for loans |  |
Total | 937 | 608
60-89 days past due |  |
Credit risk profile by internally assigned grade for loans |  |
Total | 2,640 | 5,411
60-89 days past due | Real estate | Residential 1-4 family |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 0 | 0
One Year before Current Year | 276 | 476
Two Years before Current Year | 0 | 0
Three Years before Current Year | 0 | 0
Four Years before Current Year | 0 | 0
Prior | 1,308 | 2,314
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 1,584 | 2,790
60-89 days past due | Real estate | Home equity line of credit |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 0 | 0
One Year before Current Year | 0 | 0
Two Years before Current Year | 0 | 0
Three Years before Current Year | 0 | 0
Four Years before Current Year | 0 | 0
Prior | 0 | 0
Revolving | 107 | 267
Converted to term loans | 101 | 75
Total | 208 | 342
60-89 days past due | Real estate | Residential land |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 0 | 0
One Year before Current Year | 0 | 0
Two Years before Current Year | 0 | 0
Three Years before Current Year | 0 | 0
Four Years before Current Year | 0 | 0
Prior | 0 | 0
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 0 | 0
60-89 days past due | Real estate | Residential construction |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 0 | 0
One Year before Current Year | 0 | 0
Two Years before Current Year | 0 | 0
Three Years before Current Year | 0 | 0
Four Years before Current Year | 0 | 0
Prior | 0 | 0
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 0 | 0
60-89 days past due | Real estate | Commercial real estate |  |
Credit risk profile by internally assigned grade for loans |  |
Total | 0 | 488
60-89 days past due | Real estate | Commercial construction |  |
Credit risk profile by internally assigned grade for loans |  |
Total | 0 | 0
60-89 days past due | Consumer |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 24 | 191
One Year before Current Year | 58 | 549
Two Years before Current Year | 368 | 427
Three Years before Current Year | 198 | 165
Four Years before Current Year | 43 | 3
Prior | 0 | 0
Revolving | 61 | 97
Converted to term loans | 28 | 59
Total | 780 | 1,491
60-89 days past due | Commercial |  |
Credit risk profile by internally assigned grade for loans |  |
Total | 68 | 300
Greater than 89 days past due |  |
Credit risk profile by internally assigned grade for loans |  |
Total | 11,467 | 6,830
Greater than 89 days past due | Real estate | Residential 1-4 family |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 0 | 0
One Year before Current Year | 0 | 0
Two Years before Current Year | 3,949 | 0
Three Years before Current Year | 424 | 353
Four Years before Current Year | 0 | 0
Prior | 4,179 | 2,362
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 8,552 | 2,715
Greater than 89 days past due | Real estate | Home equity line of credit |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 0 | 0
One Year before Current Year | 0 | 0
Two Years before Current Year | 0 | 0
Three Years before Current Year | 0 | 0
Four Years before Current Year | 0 | 0
Prior | 0 | 0
Revolving | 1,029 | 1,463
Converted to term loans | 426 | 589
Total | 1,455 | 2,052
Greater than 89 days past due | Real estate | Residential land |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 0 | 0
One Year before Current Year | 0 | 0
Two Years before Current Year | 0 | 0
Three Years before Current Year | 0 | 0
Four Years before Current Year | 0 | 0
Prior | 300 | 300
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 300 | 300
Greater than 89 days past due | Real estate | Residential construction |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 0 | 0
One Year before Current Year | 0 | 0
Two Years before Current Year | 0 | 0
Three Years before Current Year | 0 | 0
Four Years before Current Year | 0 | 0
Prior | 0 | 0
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 0 | 0
Greater than 89 days past due | Real estate | Commercial real estate |  |
Credit risk profile by internally assigned grade for loans |  |
Total | 0 | 0
Greater than 89 days past due | Real estate | Commercial construction |  |
Credit risk profile by internally assigned grade for loans |  |
Total | 0 | 0
Greater than 89 days past due | Consumer |  |
Credit risk profile by internally assigned grade for loans |  |
Current Year | 29 | 131
One Year before Current Year | 140 | 532
Two Years before Current Year | 396 | 409
Three Years before Current Year | 158 | 119
Four Years before Current Year | 44 | 7
Prior | 0 | 0
Revolving | 149 | 262
Converted to term loans | 134 | 171
Total | 1,050 | 1,631
Greater than 89 days past due | Commercial |  |
Credit risk profile by internally assigned grade for loans |  |
Total | $ 110 | $ 132

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