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Equity (Schedule of Reclassifications out of AOCI) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Investment related gains (losses), net |  | $ 57,323 | $ (9,312) | $ 87,036 | $ (17,004)
Investment income |  | 678,805 | 572,742 | 1,842,760 | 1,617,132
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest |  | 347,090 | 322,661 | 823,731 | 707,874
Income Tax Expense (Benefit) |  | (84,325) | (21,462) | (188,761) | (102,071)
Net income |  | 262,765 | 301,199 | 634,970 | 605,803
Unrealized Appreciation Depreciation Of Investments [Member] |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest |  | 72,029 | (25,858) | 170,531 | (79,505)
Income Tax Expense (Benefit) |  | (14,808) | 5,355 | (35,087) | 16,978
Net income |  | 57,221 | (20,503) | 135,444 | (62,527)
Unrealized Appreciation Depreciation Of Investments [Member] | Unrealized Gains Losses On Available For Sale Securities [Member] |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Investment related gains (losses), net |  | 50,537 | (21,249) | 70,513 | (60,347)
Unrealized Appreciation Depreciation Of Investments [Member] | Interest Rate Swap [Member] |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | [1] | 255 | 234 | 1,107 | (108)
Unrealized Appreciation Depreciation Of Investments [Member] | Currency Swap [Member] |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | [1] | (38) | 50 | (19) | 270
Unrealized Appreciation Depreciation Of Investments [Member] | DAC Attributed To Unrealized Gains Losses [Member] |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Deferred policy acquisition costs attributed to unrealized gains and losses | [2] | 21,275 | (4,893) | (98,930) | (19,320)
Amortization Of Unrealized Pension And Postretirement Benefits [Member] |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest |  | (835) | (1,620) | (3,728) | (3,986)
Income Tax Expense (Benefit) |  | 175 | 340 | 783 | 837
Net income |  | (660) | (1,280) | (2,945) | (3,149)
Amounts Reclassified From AOCI [Member] |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Net income |  | 56,561 | (21,783) | 132,499 | (65,676)
Prior Service Cost [Member] | Amortization Of Unrealized Pension And Postretirement Benefits [Member] |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Prior service cost | [3] | 267 | 246 | 804 | 739
Actuarial Gains Losses [Member] | Amortization Of Unrealized Pension And Postretirement Benefits [Member] |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Actuarial gains/(losses) | [3] | $ (1,102) | $ (1,866) | $ 4,532 | $ (4,725)
[1] | See Note 5 - “Derivative Instruments” for additional information on cash flow hedges.
[2] | This AOCI component is included in the computation of the deferred policy acquisition cost. See Note 8 – “Deferred Policy Acquisition Costs” of the 2018 Annual Report for additional details.
[3] | This AOCI component is included in the computation of the net periodic pension cost. See Note 10 – “Employee Benefit Plans” for additional details.

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