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Accumulated Other Comprehensive Loss (Tables) | 3 Months Ended
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Mar. 31, 2019
Partners' Capital, Comprehensive Income [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | The following table presents the changes in each component of accumulated other comprehensive loss, net of tax, for the three months ended March 31, 2019 and 2018 (in thousands):
|  | Three months ended |  |  | Three months ended |
|  | March 31, 2019 |  |  | March 31, 2018 |
|  | Net |  |  |  |  |  |  |  |  | Net |  |  |  |  |  |  |
|  | Unrealized |  |  |  |  |  |  |  |  | Unrealized |  |  |  |  |  |  |
|  | Gains and |  |  |  |  |  |  |  |  | Gains and |  |  |  |  |  |  |
|  | (Losses) on |  |  | Defined |  |  |  |  |  | (Losses) on |  |  | Defined |  |  |  |
|  | Investment |  |  | Benefit |  |  |  |  |  | Investment |  |  | Benefit |  |  |  |
|  | Securities |  |  | Pension |  |  |  |  |  | Securities |  |  | Pension |  |  |  |
|  | AFS (1) |  |  | Items (1) |  |  | Total (1) |  |  | AFS (1) |  |  | Items (1) |  |  | Total (1) |
Beginning balance |  | $ | (1,409 | ) |  | $ | (12,816 | ) |  | $ | (14,225 | ) |  | $ | (327 | ) |  | $ | (12,623 | ) |  | $ | (12,950 | )
Other comprehensive income (loss) before reclassifications |  |  | 1,393 |  |  |  | (1,739 | ) |  |  | (346 | ) |  |  | (1,316 | ) |  |  | 517 |  |  |  | (799 | )
Amounts reclassified from accumulated other comprehensive loss |  |  | — |  |  |  | 289 |  |  |  | 289 |  |  |  | 117 |  |  |  | 308 |  |  |  | 425 |
Net current period other comprehensive income (loss) |  |  | 1,393 |  |  |  | (1,450 | ) |  |  | (57 | ) |  |  | (1,199 | ) |  |  | 825 |  |  |  | (374 | )
Ending balance |  | $ | (16 | ) |  | $ | (14,266 | ) |  | $ | (14,282 | ) |  | $ | (1,526 | ) |  | $ | (11,798 | ) |  | $ | (13,324 | )
| (1) | Amounts in parentheses indicate debits on the Consolidated Balance Sheets.
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] | The following table presents the amounts reclassified out of each component of accumulated other comprehensive loss for the three months ended March 31, 2019 and 2018 (in thousands):
|  | Amount reclassified from accumulated other comprehensive loss (1) |  |  |
Details about accumulated other comprehensive loss components |  | For the three months ended March 31, 2019 |  |  | For the three months ended March 31, 2018 |  |  | Affected line item in the consolidated statement of operations
Realized loss on sale of securities |  | $ | — |  |  | $ | 148 |  |  | Net realized loss on investment securities
|  |  | — |  |  |  | (31 | ) |  | Provision for income tax expense
|  | $ | — |  |  | $ | 117 |  |  | Net of tax
Amortization of estimated defined benefit pension plan loss |  | $ | 366 |  |  | $ | 390 |  |  | Other expense
|  |  | (77 | ) |  |  | (82 | ) |  | Provision for income tax expense
|  | $ | 289 |  |  | $ | 308 |  |  | Net of tax
Total reclassifications for the period |  | $ | 289 |  |  | $ | 425 |  |  | Net income
| (1) | Amounts in parentheses indicate credits.

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- Definition Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss). + References No definition available. + Details
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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 + Details
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