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Loans and Allowance for Credit Losses - Impaired loans, by class of loan (Details) $ in Thousands | 3 Months Ended
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Dec. 31, 2019 USD ($)
Unpaid Contractual Principal Balance | $ 54,883
Recorded Investment With No Allowance | 35,235
Recorded Investment With Allowance | 19,648
Total Recorded Investment | 54,883
Related Allowance | 9,124
Average Recorded Investment | 54,258
Commercial |
Unpaid Contractual Principal Balance | 15,814
Recorded Investment With No Allowance | 11,858
Recorded Investment With Allowance | 3,956
Total Recorded Investment | 15,814
Related Allowance | 5,714
Average Recorded Investment | 15,682
Income producing - commercial real estate |
Unpaid Contractual Principal Balance | 14,093
Recorded Investment With No Allowance | 2,713
Recorded Investment With Allowance | 11,380
Total Recorded Investment | 14,093
Related Allowance | 2,145
Average Recorded Investment | 18,133
Owner occupied - Commercial real estate |
Unpaid Contractual Principal Balance | 7,349
Recorded Investment With No Allowance | 6,388
Recorded Investment With Allowance | 961
Total Recorded Investment | 7,349
Related Allowance | 415
Average Recorded Investment | 6,107
Real estate mortgage residential |
Unpaid Contractual Principal Balance | 5,631
Recorded Investment With No Allowance | 3,175
Recorded Investment With Allowance | 2,456
Total Recorded Investment | 5,631
Related Allowance | 650
Average Recorded Investment | 5,638
Construction - commercial and residential |
Unpaid Contractual Principal Balance | 11,509
Recorded Investment With No Allowance | 11,101
Recorded Investment With Allowance | 408
Total Recorded Investment | 11,509
Related Allowance | 100
Average Recorded Investment | 8,211
Home equity |
Unpaid Contractual Principal Balance | 487
Recorded Investment With Allowance | 487
Total Recorded Investment | 487
Related Allowance | 100
Average Recorded Investment | $ 487

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