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Goodwill and Intangible Assets (Tables) | 6 Months Ended
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Jun. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill and Intangible Assets | The following table sets forth activity for goodwill and other intangible assets for the periods indicated:
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2016 |  | 2015 |  | 2016 |  | 2015
|  | (in thousands)
Goodwill |  |  |  |  |  |  |  |
Total goodwill |  | $ | 382,762 |  |  | $ | 382,537 |  |  | $ | 382,762 |  |  | $ | 382,537 |
Other intangible assets, net |  |  |  |  |  |  |  |
Core deposit intangible: |  |  |  |  |  |  |  |
Gross core deposit intangible balance at beginning of period |  | 58,598 |  |  | 58,598 |  |  | 58,598 |  |  | 58,598 |
Accumulated amortization at beginning of period |  | (37,523 | ) |  | (30,875 | ) |  | (35,940 | ) |  | (29,058 | )
Core deposit intangible, net at beginning of period |  | 21,075 |  |  | 27,723 |  |  | 22,658 |  |  | 29,540 |
CDI current period amortization |  | (1,483 | ) |  | (1,718 | ) |  | (3,066 | ) |  | (3,535 | )
Total core deposit intangible, net at end of period |  | 19,592 |  |  | 26,005 |  |  | 19,592 |  |  | 26,005 |
Intangible assets not subject to amortization |  | 919 |  |  | 919 |  |  | 919 |  |  | 919 |
Other intangible assets, net at end of period |  | 20,511 |  |  | 26,924 |  |  | 20,511 |  |  | 26,924 |
Total goodwill and other intangible assets at end of period |  | $ | 403,273 |  |  | $ | 409,461 |  |  | $ | 403,273 |  |  | $ | 409,461 |
Estimated Future Amortization Expense of Core Deposit Intangibles | The following table provides the estimated future amortization expense of core deposit intangibles for the remaining six months ending December 31, 2016 and the succeeding four years:
|  | Amount
|  | (in thousands)
Year ending December 31, |  |
2016 |  | $ | 2,880 |
2017 |  | 4,913 |
2018 |  | 3,855 |
2019 |  | 2,951 |
2020 |  | 2,048 |

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- Definition Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class. + 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 + Details
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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + 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 + Details
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