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Loans and Allowance - Narrative (Details) loan in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2020 USD ($) | Jun. 30, 2019 USD ($) | Jun. 30, 2020 USD ($) loan | Jun. 30, 2019 USD ($) | Mar. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Receivables [Abstract] |  |  |  |  |  |  |  |
Loans held for sale | $ 901 |  | $ 901 |  |  | $ 9,037 |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Number of funded loans | loan |  |  | 5 |  |  |  |  |
Loans | 9,298,541 |  | $ 9,298,541 |  |  | 8,459,310 |  |
Loans - allowance for loan losses | 121,119 | $ 81,274 | 121,119 | $ 81,274 | $ 99,454 | 80,284 | $ 80,902 | $ 80,552
Increase in past due loans |  |  | 25,100 |  |  |  |  |
PPP, CARES Act |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loans net of deferred fees | 882,900 |  | 882,900 |  |  |  |  |
Deferred fees | 24,600 |  | 24,600 |  |  |  |  |
Residential |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loans | 1,677,501 |  | 1,677,501 |  |  | 1,732,201 |  |
Loans - allowance for loan losses | $ 21,078 | $ 14,471 | $ 21,078 | $ 14,471 | $ 17,364 | 14,569 | $ 14,373 | $ 14,322
Percentage of troubled debt restructured loans | 42.00% | 100.00% | 42.00% | 100.00% |  |  |  |
Mortgage loans with formal foreclosure proceedings | $ 492 |  | $ 492 |  |  | 1,033 |  |
Loans acquired with deteriorated credit quality |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loans | 8,281 |  | 8,281 |  |  | 13,309 |  |
Loans acquired with deteriorated credit quality | Commercial and consumer loan |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loans | 3,783 |  | 3,783 |  |  | 2,819 |  |
Loans - allowance for loan losses | 192 |  | 192 |  |  | 124 |  |
Loans acquired with deteriorated credit quality | Residential |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loans | 955 |  | 955 |  |  | $ 1,715 |  |
Four relationships |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Increase in past due loans |  |  | 28,600 |  |  |  |  |
Three relationships |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Increase in non-accrual loans |  |  | 34,200 |  |  |  |  |
Three relationships | Real estate secured loan |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Increase in past due loans |  |  | $ 17,800 |  |  |  |  |
Increase in non-accrual loans, percent of total |  |  | 69.00% |  |  |  |  |
Two relationships | Senior living sector |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Increase in non-accrual loans |  |  | $ 17,000 |  |  |  |  |
One relationships | University logo apparel sports |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Increase in non-accrual loans |  |  | 14,400 |  |  |  |  |
PPPL Facility |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Outstanding balance | $ 166,900 |  | $ 166,900 |  |  |  |  |

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