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Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Tax benefit | $ 18,531 | $ 19,146 | $ 20,000
Net income | 46,432 | 43,251 | 45,172
Unrealized Gains (Losses) on AFS Securities [Member] | Reclassification Out Of Accumulated Other Comprehensive Income [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Securities losses | (106) | (211) | (45)
Tax benefit | (37) | (74) | (15)
Net income | $ (69) | $ (137) | $ (30)

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