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Stockholders' Equity (Tables) | 3 Months Ended
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Mar. 31, 2016
Stockholders' Equity Note [Abstract] |
Schedule of the change in the components of the accumulated other comprehensive income (loss) |
|  | Three months ended March 31, 2016 |
|  |  |  |  |  |  |  | Accumulated |
|  |  |  |  | Unrecognized Net |  |  | Other |
|  | Unrealized |  |  | Pension and |  |  | Comprehensive |
|  | Gain (Loss) |  |  | Postretirement |  |  | (Loss) |
(in thousands) |  | on Securities (1) |  |  | Costs (2) |  |  | Income |
Balance at beginning of period |  | $ | (591 | ) |  | $ | (1,427 | ) |  | $ | (2,018 | )
Other comprehensive income, before reclassifications |  |  | 2,006 |  |  |  | 21 |  |  |  | 2,027 |
Amounts reclassified from accumulated other comprehensive income |  |  | (472 | ) |  |  | 0 |  |  |  | (472 | )
Current period other comprehensive income, before tax |  |  | 1,534 |  |  |  | 21 |  |  |  | 1,555 |
Income tax expense |  |  | (583 | ) |  |  | (8 | ) |  |  | (591 | )
Current period other comprehensive income, net of tax |  |  | 951 |  |  |  | 13 |  |  |  | 964 |
Balance at end of period |  | $ | 360 |  |  | $ | (1,414 | ) |  | $ | (1,054 | )
|  | Three months ended March 31, 2015 |
|  |  |  |  |  |  |  | Accumulated |
|  |  |  |  | Unrecognized Net |  |  | Other |
|  | Unrealized |  |  | Pension and |  |  | Comprehensive |
|  | Gain (Loss) |  |  | Postretirement |  |  | (Loss) |
(in thousands) |  | on Securities (1) |  |  | Costs (2) |  |  | Income |
Balance at beginning of period |  | $ | 214 |  |  | $ | (1,442 | ) |  | $ | (1,228 | )
Other comprehensive income,before reclassifications |  |  | 781 |  |  |  | 0 |  |  |  | 781 |
Amounts reclassified from accumulated other comprehensive income |  |  | 0 |  |  |  | 36 |  |  |  | 36 |
Current period other comprehensive income, before tax |  |  | 781 |  |  |  | 36 |  |  |  | 817 |
Income tax expense |  |  | (297 | ) |  |  | (13 | ) |  |  | (310 | )
Current period other comprehensive income, net of tax |  |  | 484 |  |  |  | 23 |  |  |  | 507 |
Balance at end of period |  | $ | 698 |  |  | $ | (1,419 | ) |  | $ | (721 | )
(1) The pre-tax amounts reclassified from accumulated other comprehensive income (loss) are included in gain on sale of investment securities in the consolidated statements of income. (2) The pre-tax amounts reclassified from accumulated other comprehensive income (loss) are included in the computation of net periodic pension cost.

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 + Details
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Namespace Prefix: | us-gaap_
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- References No definition available. + Details
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Data Type: | xbrli:stringItemType
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Period Type: | duration