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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2017
Goodwill and Other Intangible Assets [Abstract] |
Summary of goodwill | A summary of goodwill is as follows:
(In thousands) |  |  |
January 1, 2017 |  | $ | 265,439 |
Goodwill Acquired |  |  | 2,604 |
December 31, 2017 |  | $ | 268,043 |
January 1, 2016 |  | $ | 265,957 |
Goodwill Acquired |  |  | 2,047 |
Goodwill Adjustments |  |  | (2,565 | )
December 31, 2016 |  | $ | 265,439 |
Summary of core deposit and other intangible assets | A summary of core deposit and other intangible assets follows:
|  | December 31, |
(In thousands) |  | 2017 |  |  | 2016 |
Core deposit intangibles: |  |  |  |  |  |
Gross carrying amount |  | $ | 8,975 |  |  | $ | 8,975 |
Less: accumulated amortization |  |  | 6,581 |  |  |  | 5,626 |
Net carrying amount |  | $ | 2,394 |  |  | $ | 3,349 |
Identified intangible assets: |  |  |  |  |  |  |  |
Gross carrying amount |  | $ | 33,632 |  |  | $ | 32,338 |
Less: accumulated amortization |  |  | 22,606 |  |  |  | 19,872 |
Net carrying amount |  | $ | 11,026 |  |  | $ | 12,466 |
Total intangibles: |  |  |  |  |  |  |  |
Gross carrying amount |  | $ | 42,607 |  |  | $ | 41,313 |
Less: accumulated amortization |  |  | 29,187 |  |  |  | 25,498 |
Net carrying amount |  | $ | 13,420 |  |  | $ | 15,815 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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