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v3.20.1

Loans and Allowance for Loan Losses - Textual (Details) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 USD ($) loan | Mar. 31, 2019 USD ($) loan | Dec. 31, 2019 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | $ 14,374,277,000 |  | $ 14,425,704,000
Premiums and discounts associated with acquired loans | 72,400,000 | $ 91,600,000 |
Financing receivable, accrued interest excluded from amortized costs | 47,000,000.0 |  | 48,900,000
Nonaccrual loans with no allowance for credit loss | $ 22,400,000 |  |
Troubled debt, number of contracts | 0 | 0 |
Foreclosed assets and other real estate owned | $ 20,805,000 |  | 19,121,000
Financing receivable, collateral dependent, amount | 75,670,000 |  |
Unfunded commitments, allowance for credit loss | 29,400,000 |  | 8,400,000
(Benefit) provision for credit losses on unfunded commitments | (3,000,000) | $ 300,000 |
Residential Real Estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans in process of foreclosure, amount | 5,301,000 |  | 5,789,000
Energy |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing receivable, collateral dependent, amount | 43,573,000 |  |
Increase in specific provisions | 22,000,000 |  |
OREO Received in Full or Partial Satisfaction of Loans | Residential Real Estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Foreclosed assets and other real estate owned | 2,672,000 |  | 4,458,000
Real Estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | 10,833,765,000 |  | $ 11,021,940,000
Real Estate | OREO Received in Full or Partial Satisfaction of Loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Balance prior to TDR | $ 0 |  |
Commercial Real Estate | Real Estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of loans with subsequent default | loan | 0 | 1 |
Write-down of impaired loans |  | $ 138,000 |

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- Definition Amount of increase (decrease) of allowance reserve for credit loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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