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Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Statement of Comprehensive Income [Abstract] |  |  |  |
Net income | $ 69,316 | $ 44,522 | $ 121,388 | $ 111,680
Unrealized gains and losses on securities: |  |  |  |
Change in unrealized securities gains (losses) arising during period | 24,176 | (29,226) | 92,209 | 1,189
Tax effect | (9,261) | 11,352 | (35,277) | (461)
Reclassification adjustment for net gains realized and included in income before income taxes | (12,529) | (147) | (17,157) | (5,273)
Tax effect | 4,793 | 74 | 6,563 | 2,051
Total change in unrealized gains and losses on securities, net of tax | 7,179 | (17,947) | 46,338 | (2,494)
Change in fair value of cash flow hedges: |  |  |  |
Change in unrecognized loss on cash flow hedges | 729 | 709 | 1,429 | 1,285
Tax effect | (274) | (274) | (537) | (496)
Total change in unrecognized loss on cash flow hedges, net of tax | 455 | 435 | 892 | 789
Change in pension obligation: |  |  |  |
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, before Tax | 1,882 | 2,887 | 3,534 | 5,773
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Tax | (719) | (1,123) | (1,351) | (2,246)
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Net of Tax | 1,163 | 1,764 | 2,183 | 3,527
Net current period other comprehensive income | 8,797 | (15,748) | 49,413 | 1,822
Total comprehensive income | $ 78,113 | $ 28,774 | $ 170,801 | $ 113,502

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