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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Statement of Comprehensive Income [Abstract] |  |
Net Income | $ 49,480 | $ 43,380
Other Comprehensive (Loss) Income, net of tax: |  |
Unrealized (loss) gain on securities | (27,644) | 4,273
Reclassification adjustment for securities gains included in net income | (16) | (719)
Non-credit related unrealized gain on other-than-temporarily impaired debt securities | (224) | 0
Amortization of net unrecognized pension and postretirement items | 339 | 343
Other Comprehensive (Loss) Income | (27,097) | 3,897
Total Comprehensive Income | $ 22,383 | $ 47,277

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