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v3.3.1.900

Goodwill and other Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Goodwill [Roll Forward] |  |  |
Beginning Balance | $ 263,634 | $ 264,997 |
Goodwill adjustments |  | (1,363) |
Goodwill acquired | 2,323 |  |
Ending Balance | 265,957 | 263,634 | $ 264,997
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross carrying amount | 48,926 | 47,717 |
Less: accumulated amortization | 31,661 | 27,400 |
Net carrying amount | 17,265 | 20,317 |
Amortization Expense [Abstract] |  |  |
Amortization of intangible assets | 4,864 | 5,047 | $ 4,872
Future Amortization Expense [Abstract] |  |  |
2016 | 3,800 |  |
2017 | 3,200 |  |
2018 | 2,500 |  |
2019 | 1,900 |  |
2020 | 1,500 |  |
Thereafter | $ 4,400 |  |
Minimum [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Intangible asset useful life | 1 year |  |
Maximum [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Intangible asset useful life | 12 years |  |
Core Deposits Intangibles [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross carrying amount | $ 19,401 | 19,401 |
Less: accumulated amortization | 14,800 | 12,522 |
Net carrying amount | 4,601 | 6,879 |
Identified Intangible Assets [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross carrying amount | 29,525 | 28,316 |
Less: accumulated amortization | 16,861 | 14,878 |
Net carrying amount | $ 12,664 | $ 13,438 |

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