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LOANS - Loans by Risk Grade (Details) - USD ($)
Sep. 30, 2020
Dec. 31, 2019
Sep. 30, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total $ 14,943,593,000 $ 12,818,476,000 $ 12,826,284,000
1      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   587,877,000  
2      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   840,372,000  
3      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   6,034,399,000  
4      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   4,884,542,000  
5      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   233,021,000  
6      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   86,410,000  
7      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   151,845,000  
8      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   8,000  
9      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total 0 2,000  
Commercial, financial and agricultural      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 1,239,262,000    
2019 120,483,000    
2018 83,254,000    
2017 52,072,000    
2016 157,569,000    
Prior 33,598,000    
Revolving Loans Amortized Cost Basis 193,550,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 1,879,788,000 802,171,000 931,755,000
Commercial, financial and agricultural | 1      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 1,128,005,000    
2019 1,379,000    
2018 427,000    
2017 5,700,000    
2016 3,113,000    
Prior 511,000    
Revolving Loans Amortized Cost Basis 12,969,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 1,152,104,000 22,396,000  
Commercial, financial and agricultural | 2      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 815,000    
2019 864,000    
2018 1,070,000    
2017 1,035,000    
2016 1,719,000    
Prior 201,000    
Revolving Loans Amortized Cost Basis 9,130,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 14,834,000 18,937,000  
Commercial, financial and agricultural | 3      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 44,905,000    
2019 17,422,000    
2018 20,498,000    
2017 5,410,000    
2016 57,514,000    
Prior 9,042,000    
Revolving Loans Amortized Cost Basis 72,872,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 227,663,000 215,180,000  
Commercial, financial and agricultural | 4      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 62,651,000    
2019 92,559,000    
2018 49,128,000    
2017 28,498,000    
2016 89,217,000    
Prior 22,108,000    
Revolving Loans Amortized Cost Basis 88,512,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 432,673,000 482,146,000  
Commercial, financial and agricultural | 5      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 2,812,000    
2019 4,749,000    
2018 9,084,000    
2017 5,873,000    
2016 4,747,000    
Prior 877,000    
Revolving Loans Amortized Cost Basis 3,802,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 31,944,000 33,317,000  
Commercial, financial and agricultural | 6      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 49,000    
2019 1,372,000    
2018 880,000    
2017 1,275,000    
2016 166,000    
Prior 206,000    
Revolving Loans Amortized Cost Basis 958,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 4,906,000 4,901,000  
Commercial, financial and agricultural | 7      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 25,000    
2019 2,138,000    
2018 2,167,000    
2017 4,281,000    
2016 1,093,000    
Prior 653,000    
Revolving Loans Amortized Cost Basis 5,307,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 15,664,000 25,294,000  
Commercial, financial and agricultural | 8      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Commercial, financial and agricultural | 9      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Consumer installment      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 139,245,000    
2019 111,771,000    
2018 56,501,000    
2017 11,762,000    
2016 105,679,000    
Prior 15,988,000    
Revolving Loans Amortized Cost Basis 9,864,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 450,810,000 498,577,000 500,067,000
Consumer installment | 1      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 5,631,000    
2019 1,859,000    
2018 707,000    
2017 6,000    
2016 3,872,000    
Prior 115,000    
Revolving Loans Amortized Cost Basis 1,378,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 13,568,000 13,184,000  
Consumer installment | 2      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 0    
2019 64,000    
2018 2,000    
2017 67,000    
2016 0    
Prior 0    
Revolving Loans Amortized Cost Basis 39,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 172,000 1,233,000  
Consumer installment | 3      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 11,488,000    
2019 3,545,000    
2018 1,180,000    
2017 685,000    
2016 8,759,000    
Prior 1,620,000    
Revolving Loans Amortized Cost Basis 4,628,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 31,905,000 33,314,000  
Consumer installment | 4      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 122,050,000    
2019 106,124,000    
2018 54,423,000    
2017 10,075,000    
2016 92,677,000    
Prior 14,018,000    
Revolving Loans Amortized Cost Basis 3,690,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 403,057,000 449,224,000  
Consumer installment | 5      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 55,000    
2019 33,000    
2018 29,000    
2017 246,000    
2016 137,000    
Prior 6,000    
Revolving Loans Amortized Cost Basis 8,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 514,000 208,000  
Consumer installment | 6      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 0    
2019 14,000    
2018 3,000    
2017 75,000    
2016 15,000    
Prior 49,000    
Revolving Loans Amortized Cost Basis 0    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 156,000 213,000  
Consumer installment | 7      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 21,000    
2019 132,000    
2018 157,000    
2017 608,000    
2016 219,000    
Prior 180,000    
Revolving Loans Amortized Cost Basis 121,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 1,438,000 1,191,000  
Consumer installment | 8      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   8,000  
Consumer installment | 9      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   2,000  
Indirect automobile      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 0    
2019 213,734,000    
2018 218,886,000    
2017 78,091,000    
2016 39,482,000    
Prior 132,203,000    
Revolving Loans Amortized Cost Basis 0    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 682,396,000 1,061,824,000 1,111,815,000
Indirect automobile | 1      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Indirect automobile | 2      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 0    
2019 88,000    
2018 35,000    
2017 3,990,000    
2016 0    
Prior 6,471,000    
Revolving Loans Amortized Cost Basis 0    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 10,584,000 18,354,000  
Indirect automobile | 3      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 0    
2019 212,956,000    
2018 218,057,000    
2017 72,465,000    
2016 39,310,000    
Prior 124,285,000    
Revolving Loans Amortized Cost Basis 0    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 667,073,000 1,033,861,000  
Indirect automobile | 4      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   4,009,000  
Indirect automobile | 5      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Indirect automobile | 6      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 0    
2019 83,000    
2018 92,000    
2017 86,000    
2016 0    
Prior 114,000    
Revolving Loans Amortized Cost Basis 0    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 375,000 0  
Indirect automobile | 7      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 0    
2019 607,000    
2018 702,000    
2017 1,550,000    
2016 172,000    
Prior 1,333,000    
Revolving Loans Amortized Cost Basis 0    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 4,364,000 5,600,000  
Indirect automobile | 8      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Indirect automobile | 9      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Mortgage warehouse      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 0    
2019 0    
2018 0    
2017 0    
2016 0    
Prior 0    
Revolving Loans Amortized Cost Basis 995,942,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 995,942,000 526,369,000 562,598,000
Mortgage warehouse | 1      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Mortgage warehouse | 2      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Mortgage warehouse | 3      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 0    
2019 0    
2018 0    
2017 0    
2016 0    
Prior 0    
Revolving Loans Amortized Cost Basis 995,942,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 995,942,000 526,369,000  
Mortgage warehouse | 4      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Mortgage warehouse | 5      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Mortgage warehouse | 6      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Mortgage warehouse | 7      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Mortgage warehouse | 8      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Mortgage warehouse | 9      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Municipal      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 213,698,000    
2019 37,222,000    
2018 174,812,000    
2017 119,980,000    
2016 13,477,000    
Prior 166,480,000    
Revolving Loans Amortized Cost Basis 0    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 725,669,000 564,304,000 578,267,000
Municipal | 1      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 202,019,000    
2019 37,222,000    
2018 169,359,000    
2017 101,611,000    
2016 12,732,000    
Prior 157,070,000    
Revolving Loans Amortized Cost Basis 0    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 680,013,000 552,062,000  
Municipal | 2      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 11,679,000    
2019 0    
2018 0    
2017 2,573,000    
2016 0    
Prior 9,410,000    
Revolving Loans Amortized Cost Basis 0    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 23,662,000 2,690,000  
Municipal | 3      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 0    
2019 0    
2018 5,453,000    
2017 12,595,000    
2016 745,000    
Prior 0    
Revolving Loans Amortized Cost Basis 0    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 18,793,000 8,925,000  
Municipal | 4      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 0    
2019 0    
2018 0    
2017 3,201,000    
2016 0    
Prior 0    
Revolving Loans Amortized Cost Basis 0    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 3,201,000 627,000  
Municipal | 5      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Municipal | 6      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Municipal | 7      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Municipal | 8      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Municipal | 9      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Premium finance      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 677,081,000    
2019 832,000    
2018 862,000    
2017 295,000    
2016 27,493,000    
Prior 4,327,000    
Revolving Loans Amortized Cost Basis 0    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 710,890,000 654,669,000 656,570,000
Premium finance | 1      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Premium finance | 2      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 675,156,000    
2019 832,000    
2018 862,000    
2017 295,000    
2016 27,493,000    
Prior 2,478,000    
Revolving Loans Amortized Cost Basis 0    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 707,116,000 654,069,000  
Premium finance | 3      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Premium finance | 4      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Premium finance | 5      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Premium finance | 6      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Premium finance | 7      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 1,925,000    
2019 0    
2018 0    
2017 0    
2016 0    
Prior 1,849,000    
Revolving Loans Amortized Cost Basis 0    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 3,774,000 600,000  
Premium finance | 8      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Premium finance | 9      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Real estate – construction and development      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 522,957,000    
2019 244,331,000    
2018 100,658,000    
2017 57,491,000    
2016 581,520,000    
Prior 35,092,000    
Revolving Loans Amortized Cost Basis 86,206,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 1,628,255,000 1,549,062,000 1,468,696,000
Real estate – construction and development | 1      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Real estate – construction and development | 2      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   17,535,000  
Real estate – construction and development | 3      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 27,414,000    
2019 17,241,000    
2018 8,969,000    
2017 8,350,000    
2016 7,701,000    
Prior 3,626,000    
Revolving Loans Amortized Cost Basis 682,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 73,983,000 90,124,000  
Real estate – construction and development | 4      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 493,627,000    
2019 217,729,000    
2018 89,755,000    
2017 32,030,000    
2016 544,239,000    
Prior 13,065,000    
Revolving Loans Amortized Cost Basis 85,415,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 1,475,860,000 1,377,674,000  
Real estate – construction and development | 5      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 1,372,000    
2019 3,239,000    
2018 331,000    
2017 8,672,000    
2016 24,738,000    
Prior 17,827,000    
Revolving Loans Amortized Cost Basis 109,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 56,288,000 41,759,000  
Real estate – construction and development | 6      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 0    
2019 5,190,000    
2018 1,014,000    
2017 4,604,000    
2016 1,916,000    
Prior 528,000    
Revolving Loans Amortized Cost Basis 0    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 13,252,000 17,223,000  
Real estate – construction and development | 7      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 544,000    
2019 932,000    
2018 589,000    
2017 3,835,000    
2016 2,926,000    
Prior 46,000    
Revolving Loans Amortized Cost Basis 0    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 8,872,000 4,747,000  
Real estate – construction and development | 8      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Real estate – construction and development | 9      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Real estate – commercial and farmland      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 849,440,000    
2019 757,920,000    
2018 690,987,000    
2017 1,100,251,000    
2016 1,023,077,000    
Prior 576,726,000    
Revolving Loans Amortized Cost Basis 117,851,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 5,116,252,000 4,353,039,000 4,198,759,000
Real estate – commercial and farmland | 1      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 0    
2019 193,000    
2018 0    
2017 0    
2016 0    
Prior 0    
Revolving Loans Amortized Cost Basis 0    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 193,000 208,000  
Real estate – commercial and farmland | 2      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 2,942,000    
2019 520,000    
2018 2,192,000    
2017 11,653,000    
2016 544,000    
Prior 4,460,000    
Revolving Loans Amortized Cost Basis 1,141,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 23,452,000 35,299,000  
Real estate – commercial and farmland | 3      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 581,108,000    
2019 156,745,000    
2018 204,384,000    
2017 305,731,000    
2016 378,130,000    
Prior 206,226,000    
Revolving Loans Amortized Cost Basis 72,033,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 1,904,357,000 1,720,039,000  
Real estate – commercial and farmland | 4      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 250,925,000    
2019 454,581,000    
2018 326,258,000    
2017 575,402,000    
2016 537,223,000    
Prior 297,567,000    
Revolving Loans Amortized Cost Basis 41,814,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 2,483,770,000 2,348,083,000  
Real estate – commercial and farmland | 5      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 13,706,000    
2019 110,502,000    
2018 91,700,000    
2017 113,572,000    
2016 56,746,000    
Prior 30,747,000    
Revolving Loans Amortized Cost Basis 1,125,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 418,098,000 133,119,000  
Real estate – commercial and farmland | 6      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 498,000    
2019 21,790,000    
2018 30,356,000    
2017 31,466,000    
2016 36,514,000    
Prior 3,767,000    
Revolving Loans Amortized Cost Basis 866,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 125,257,000 53,941,000  
Real estate – commercial and farmland | 7      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 261,000    
2019 13,589,000    
2018 36,097,000    
2017 62,427,000    
2016 13,920,000    
Prior 33,959,000    
Revolving Loans Amortized Cost Basis 872,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 161,125,000 62,350,000  
Real estate – commercial and farmland | 8      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Real estate – commercial and farmland | 9      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Real estate – residential      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 514,244,000    
2019 321,671,000    
2018 237,716,000    
2017 590,181,000    
2016 617,600,000    
Prior 196,910,000    
Revolving Loans Amortized Cost Basis 273,429,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 1,840,000    
Total 2,753,591,000 2,808,461,000 $ 2,817,757,000
Real estate – residential | 1      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 0    
2019 0    
2018 0    
2017 21,000    
2016 0    
Prior 0    
Revolving Loans Amortized Cost Basis 0    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 21,000 27,000  
Real estate – residential | 2      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 38,000    
2019 13,000    
2018 124,000    
2017 51,698,000    
2016 408,000    
Prior 1,348,000    
Revolving Loans Amortized Cost Basis 1,636,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 55,265,000 92,255,000  
Real estate – residential | 3      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 486,558,000    
2019 268,355,000    
2018 198,299,000    
2017 406,482,000    
2016 533,460,000    
Prior 160,532,000    
Revolving Loans Amortized Cost Basis 214,075,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 1,792,000    
Total 2,269,553,000 2,406,587,000  
Real estate – residential | 4      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 14,078,000    
2019 19,098,000    
2018 12,001,000    
2017 61,872,000    
2016 21,005,000    
Prior 14,926,000    
Revolving Loans Amortized Cost Basis 48,030,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 48,000    
Total 191,058,000 222,779,000  
Real estate – residential | 5      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 7,852,000    
2019 18,870,000    
2018 17,092,000    
2017 37,919,000    
2016 38,570,000    
Prior 12,707,000    
Revolving Loans Amortized Cost Basis 3,647,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 136,657,000 24,618,000  
Real estate – residential | 6      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 251,000    
2019 909,000    
2018 60,000    
2017 3,946,000    
2016 1,750,000    
Prior 288,000    
Revolving Loans Amortized Cost Basis 351,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total 7,555,000 10,132,000  
Real estate – residential | 7      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 5,467,000    
2019 14,426,000    
2018 10,140,000    
2017 28,243,000    
2016 22,407,000    
Prior 7,109,000    
Revolving Loans Amortized Cost Basis 5,690,000    
Revolving Loans Converted to Term Loans Amortized Cost Basis 0    
Total $ 93,482,000 52,063,000  
Real estate – residential | 8      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   0  
Real estate – residential | 9      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total   $ 0