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v3.19.1

Accumulated Other Comprehensive Income Components of Other Comprehensive Income (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Accumulated Other Comprehensive Income [Roll Forward] |  |
Beginning Balance | $ 2,247,573 | $ 2,229,857
Ending Balance | 2,301,019 | 2,235,493
Unrealized Gains (Losses) on Investment Securities Not Other-Than-Temporarily Impaired |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |
Beginning Balance | (44,654) | (18,509)
Other comprehensive income before reclassifications | 20,298 | (27,644)
Amounts reclassified from accumulated other comprehensive income (loss) | (51) | (16)
Reclassification of stranded tax effects |  | (3,887)
Ending Balance | (23,433) | (50,056)
Unrealized Non-Credit Gains (Losses) on Other-Than-Temporarily Impaired Debt Securities |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |
Beginning Balance | 680 | 458
Other comprehensive income before reclassifications | (82) | 224
Amounts reclassified from accumulated other comprehensive income (loss) | 0 | 0
Reclassification of stranded tax effects |  | 0
Ending Balance | 598 | 682
Unrecognized Pension and Postretirement Plan Income (Costs) |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |
Beginning Balance | (15,089) | (14,923)
Other comprehensive income before reclassifications | 0 | 0
Amounts reclassified from accumulated other comprehensive income (loss) | 291 | 339
Reclassification of stranded tax effects |  | (3,214)
Ending Balance | (14,798) | (17,798)
Total |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |
Beginning Balance | (59,063) | (32,974)
Other comprehensive income before reclassifications | 20,216 | (27,420)
Amounts reclassified from accumulated other comprehensive income (loss) | 240 | 323
Reclassification of stranded tax effects |  | (7,101)
Ending Balance | (37,633) | $ (67,172)
Reclassification out of Accumulated Other Comprehensive Income |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |
Amounts reclassified from accumulated other comprehensive income (loss) | (974) |
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) on Investment Securities Not Other-Than-Temporarily Impaired |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |
Amounts reclassified from accumulated other comprehensive income (loss) | (974) |
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Non-Credit Gains (Losses) on Other-Than-Temporarily Impaired Debt Securities |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |
Amounts reclassified from accumulated other comprehensive income (loss) | 0 |
Reclassification out of Accumulated Other Comprehensive Income | Unrecognized Pension and Postretirement Plan Income (Costs) |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |
Amounts reclassified from accumulated other comprehensive income (loss) | $ 0 |

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