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Allowance for Credit Losses - Investments in Loans Considered to be Impaired and Related Information on Impaired Loans (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2019 | Dec. 31, 2019
Financing Receivable, Impaired [Line Items] |  |  |
With a related allowance recorded, Recorded Investment |  |  | $ 23,510
With a related allowance recorded, Unpaid Principal Balance |  |  | 24,821
Impaired financing receivable, Related Allowance |  |  | 2,200
Without a related allowance recorded, Recorded Investment |  |  | 51,827
Without a related allowance, Unpaid Principal Balance |  |  | 61,950
Impaired Financing Receivable, Recorded Investment, Total |  |  | 75,337
Impaired Financing Receivable, Total Unpaid Principal Balance, Total |  |  | 86,771
With a related allowance recorded, Average Recorded Investment | $ 9,632 | $ 9,649 |
With a related allowance recorded, Interest Income Recognized | 13 | 27 |
Without a related allowance recorded, Average Recorded Investment | 39,644 | 37,724 |
Without a related allowance recorded, Interest Income Recognized | 349 | 584 |
Impaired financing receivable, Average Recorded Investment, Total | 49,276 | 47,373 |
Impaired financing Receivable, Interest Income Recognized, Total | 362 | 611 |
Commercial real estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
With a related allowance recorded, Recorded Investment |  |  | 13,011
With a related allowance recorded, Unpaid Principal Balance |  |  | 14,322
Impaired financing receivable, Related Allowance |  |  | 2,023
Without a related allowance recorded, Recorded Investment |  |  | 34,909
Without a related allowance, Unpaid Principal Balance |  |  | 40,201
Impaired Financing Receivable, Recorded Investment, Total |  |  | 47,920
Impaired Financing Receivable, Total Unpaid Principal Balance, Total |  |  | 54,523
With a related allowance recorded, Average Recorded Investment | 7,703 | 7,704 |
With a related allowance recorded, Interest Income Recognized | 0 | 0 |
Without a related allowance recorded, Average Recorded Investment | 21,802 | 22,093 |
Without a related allowance recorded, Interest Income Recognized | 77 | 124 |
Impaired financing receivable, Average Recorded Investment, Total | 29,505 | 29,797 |
Impaired financing Receivable, Interest Income Recognized, Total | 77 | 124 |
Commercial and industrial |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
With a related allowance recorded, Recorded Investment |  |  | 10,001
With a related allowance recorded, Unpaid Principal Balance |  |  | 10,001
Impaired financing receivable, Related Allowance |  |  | 55
Without a related allowance recorded, Recorded Investment |  |  | 7,605
Without a related allowance, Unpaid Principal Balance |  |  | 10,358
Impaired Financing Receivable, Recorded Investment, Total |  |  | 17,606
Impaired Financing Receivable, Total Unpaid Principal Balance, Total |  |  | 20,359
With a related allowance recorded, Average Recorded Investment | 758 | 772 |
With a related allowance recorded, Interest Income Recognized | 13 | 26 |
Without a related allowance recorded, Average Recorded Investment | 7,568 | 5,329 |
Without a related allowance recorded, Interest Income Recognized | 131 | 189 |
Impaired financing receivable, Average Recorded Investment, Total | 8,326 | 6,101 |
Impaired financing Receivable, Interest Income Recognized, Total | 144 | 215 |
Commercial construction |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
With a related allowance recorded, Recorded Investment |  |  | 489
With a related allowance recorded, Unpaid Principal Balance |  |  | 489
Impaired financing receivable, Related Allowance |  |  | 113
Without a related allowance recorded, Recorded Investment |  |  | 1,425
Without a related allowance, Unpaid Principal Balance |  |  | 2,935
Impaired Financing Receivable, Recorded Investment, Total |  |  | 1,914
Impaired Financing Receivable, Total Unpaid Principal Balance, Total |  |  | 3,424
With a related allowance recorded, Average Recorded Investment | 489 | 489 |
With a related allowance recorded, Interest Income Recognized | 0 | 0 |
Without a related allowance recorded, Average Recorded Investment | 2,319 | 2,319 |
Without a related allowance recorded, Interest Income Recognized | 48 | 83 |
Impaired financing receivable, Average Recorded Investment, Total | 2,808 | 2,808 |
Impaired financing Receivable, Interest Income Recognized, Total | 48 | 83 |
Consumer real estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
With a related allowance recorded, Recorded Investment |  |  | 0
With a related allowance recorded, Unpaid Principal Balance |  |  | 0
Impaired financing receivable, Related Allowance |  |  | 0
Without a related allowance recorded, Recorded Investment |  |  | 7,884
Without a related allowance, Unpaid Principal Balance |  |  | 8,445
Impaired Financing Receivable, Recorded Investment, Total |  |  | 7,884
Impaired Financing Receivable, Total Unpaid Principal Balance, Total |  |  | 8,445
With a related allowance recorded, Average Recorded Investment | 666 | 666 |
With a related allowance recorded, Interest Income Recognized | 0 | 0 |
Without a related allowance recorded, Average Recorded Investment | 7,952 | 7,979 |
Without a related allowance recorded, Interest Income Recognized | 93 | 188 |
Impaired financing receivable, Average Recorded Investment, Total | 8,618 | 8,645 |
Impaired financing Receivable, Interest Income Recognized, Total | 93 | 188 |
Other consumer |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
With a related allowance recorded, Recorded Investment |  |  | 9
With a related allowance recorded, Unpaid Principal Balance |  |  | 9
Impaired financing receivable, Related Allowance |  |  | 9
Without a related allowance recorded, Recorded Investment |  |  | 4
Without a related allowance, Unpaid Principal Balance |  |  | 11
Impaired Financing Receivable, Recorded Investment, Total |  |  | 13
Impaired Financing Receivable, Total Unpaid Principal Balance, Total |  |  | $ 20
With a related allowance recorded, Average Recorded Investment | 16 | 18 |
With a related allowance recorded, Interest Income Recognized | 0 | 1 |
Without a related allowance recorded, Average Recorded Investment | 3 | 4 |
Without a related allowance recorded, Interest Income Recognized | 0 | 0 |
Impaired financing receivable, Average Recorded Investment, Total | 19 | 22 |
Impaired financing Receivable, Interest Income Recognized, Total | $ 0 | $ 1 |

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