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v3.19.1

Changes in Accumulated Other Comprehensive Income by Component - Reclassification Adjustments (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |  |  |
Tax benefit |  |  |  |  |  |  |  |  | $ (16,386) | $ (44,739) | $ (42,991)
Net income | $ 31,552 | $ 26,086 | $ 25,814 | $ 72 | $ 20,186 | $ 23,472 | $ 22,551 | $ 22,017 | 83,524 | 88,226 | 77,396
Realized Gains (Losses) on Sale of Available-for-sale Securities | Amounts Reclassified from Accumulated Other Comprehensive Income |  |  |  |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |  |  |
Losses from the sale of available-for-sale securities |  |  |  |  |  |  |  |  | 197 | 11 | 222
Tax benefit |  |  |  |  |  |  |  |  | (32) | (4) | (79)
Net income |  |  |  |  |  |  |  |  | $ 165 | $ 7 | $ 143

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