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Loans, Troubled Debt Restructurings Performing and Nonaccrual (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Financing Receivable, Modifications [Line Items] |  |
Performing Restructured Loans | $ 63,723 | $ 74,618
Nonaccrual Restructured Loans | 38,005 | 23,486
Commercial and industrial |  |
Financing Receivable, Modifications [Line Items] |  |
Performing Restructured Loans | 32,438 | 30,047
Nonaccrual Restructured Loans | 155 | 1,776
Commercial real estate — owner occupied |  |
Financing Receivable, Modifications [Line Items] |  |
Performing Restructured Loans | 3,820 | 3,989
Nonaccrual Restructured Loans | 0 | 0
Commercial real estate — investor |  |
Financing Receivable, Modifications [Line Items] |  |
Performing Restructured Loans | 372 | 14,389
Nonaccrual Restructured Loans | 14,268 | 0
Real estate construction |  |
Financing Receivable, Modifications [Line Items] |  |
Performing Restructured Loans | 222 | 310
Nonaccrual Restructured Loans | 226 | 157
Residential mortgage |  |
Financing Receivable, Modifications [Line Items] |  |
Performing Restructured Loans | 17,934 | 17,068
Nonaccrual Restructured Loans | 20,372 | 18,991
Home equity |  |
Financing Receivable, Modifications [Line Items] |  |
Performing Restructured Loans | 7,900 | 7,705
Nonaccrual Restructured Loans | 2,972 | 2,537
Other consumer |  |
Financing Receivable, Modifications [Line Items] |  |
Performing Restructured Loans | 1,037 | 1,110
Nonaccrual Restructured Loans | $ 12 | $ 25

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