XML 27 R16.htm IDEA: XBRL DOCUMENT
v3.19.1

Reclassification Adjustments Out of Other Comprehensive Income (Loss) | 3 Months Ended
--- | ---
Mar. 31, 2019
Reclassification Adjustments Out of Other Comprehensive Income (Loss) [Abstract] |
Reclassification Adjustments Out of Other Comprehensive Income (Loss) | 8. Reclassification Adjustments Out of Other Comprehensive Income (Loss) The following table summarizes the reclassification adjustments out of accumulated other comprehensive income (loss) (“AOCI”):
Detail About AOCI Components |  |  | Amount Reclassified from AOCI |  |  | Affected Line Item in the Consolidated Statements of Comprehensive Income (Loss)
|  |  | Three months ended |  |  |
(In thousands) |  |  | March 31, 2019 |  |  | March 31, 2018 |  |  |
AFS securities: |  |  |  |  |  |  |  |  |
Losses on AFS securities |  |  | $ | 99 |  |  | $ | - |  |  | Net securities gains
Amortization of unrealized gains related to securities transfer |  |  |  | 167 |  |  |  | 188 |  |  | Interest income
Tax effect |  |  | $ | (67 | ) |  | $ | (47 | ) |  | Income tax (benefit)
Net of tax |  |  | $ | 199 |  |  | $ | 141 |  |  |
Cash flow hedges: |  |  |  |  |  |  |  |  |  |  |
Net unrealized (gains) on cash flow hedges reclassified to interest expense |  |  | $ | (799 | ) |  | $ | (359 | ) |  | Interest expense
Tax effect |  |  | $ | 200 |  |  | $ | 90 |  |  | Income tax expense
Net of tax |  |  | $ | (599 | ) |  | $ | (269 | ) |  |
Pension and other benefits: |  |  |  |  |  |  |  |  |  |  |
Amortization of net losses |  |  | $ | 634 |  |  | $ | 273 |  |  | Other noninterest expense
Amortization of prior service costs |  |  |  | 22 |  |  |  | 22 |  |  | Other noninterest expense
Tax effect |  |  | $ | (164 | ) |  | $ | (74 | ) |  | Income tax (benefit)
Net of tax |  |  | $ | 492 |  |  | $ | 221 |  |  |
Total reclassifications, net of tax |  |  | $ | 92 |  |  | $ | 93 |  |  |

X
- References No definition available. + Details
Name: | nbtb_ReclassificationAdjustmentsOutOfOtherComprehensiveIncomeLossAbstract
Namespace Prefix: | nbtb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for reclassification from accumulated other comprehensive income. + References No definition available. + Details
Name: | nbtb_ReclassificationAdjustmentsOutOfOtherComprehensiveIncomeLossTextBlock
Namespace Prefix: | nbtb_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration