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Derivative Instruments (Schedule of Location on Consolidated Balance Sheets and Fair Value of Principal Derivative Instruments) (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Derivative Assets |  |
Gross Amounts of Recognized Assets | $ 28,154 | $ 22,874
Gross Amounts Offset in the Balance Sheet | 3,829 | 3,944
Net Amounts of Assets Presented in the Balance Sheet | 24,325 | 18,930
Collateral | 3,601 | 0
Net Amount | 20,724 | 18,930
Derivative Liabilities |  |
Gross Amounts of Recognized Liabilities | 8,160 | 8,225
Gross Amounts Offset in the Balance Sheet | 772 | 1,684
Net Amounts of Liabilities Presented in the Balance Sheet | 7,388 | 6,540
Collateral Pledged | 1,473 | 2,132
Net Amount | 5,915 | 4,408
Not Designated as Hedging Instrument |  |
Derivative Assets |  |
Gross Amounts of Recognized Assets | 28,090 |
Gross Amounts Offset in the Balance Sheet | 3,162 |
Net Amounts of Assets Presented in the Balance Sheet | 24,928 |
Collateral | 3,601 |
Net Amount | 21,327 |
Derivative Liabilities |  |
Gross Amounts of Recognized Liabilities | 6,342 |
Gross Amounts Offset in the Balance Sheet | 772 |
Net Amounts of Liabilities Presented in the Balance Sheet | 5,570 |
Collateral Pledged | 1,473 |
Net Amount | 4,097 |
Designated as Hedging Instrument |  |
Derivative Assets |  |
Gross Amounts of Recognized Assets | 64 |
Gross Amounts Offset in the Balance Sheet | 667 |
Net Amounts of Assets Presented in the Balance Sheet | (603) |
Collateral | 0 |
Net Amount | (603) |
Other assets | Interest rate futures | Not Designated as Hedging Instrument |  |
Derivative Assets |  |
Gross Amounts of Recognized Assets | 234 | 971
Gross Amounts Offset in the Balance Sheet | 122 | 636
Net Amounts of Assets Presented in the Balance Sheet | 112 | 335
Collateral | 0 | 0
Net Amount | 112 | 335
Other assets | Interest rate swaps | Not Designated as Hedging Instrument |  |
Derivative Assets |  |
Gross Amounts of Recognized Assets |  | 860
Gross Amounts Offset in the Balance Sheet |  | 0
Net Amounts of Assets Presented in the Balance Sheet |  | 860
Collateral |  | 0
Net Amount |  | 860
Other assets | Foreign currency forward contracts | Not Designated as Hedging Instrument |  |
Derivative Assets |  |
Gross Amounts of Recognized Assets | 22,702 | 16,459
Gross Amounts Offset in the Balance Sheet | 2,418 | 2,260
Net Amounts of Assets Presented in the Balance Sheet | 20,284 | 14,199
Collateral | 0 | 0
Net Amount | 20,284 | 14,199
Other assets | Foreign currency forward contracts | Not Designated as Hedging Instrument |  |
Derivative Assets |  |
Gross Amounts of Recognized Assets | 1,082 | 3,194
Gross Amounts Offset in the Balance Sheet | 622 | 71
Net Amounts of Assets Presented in the Balance Sheet | 460 | 3,123
Collateral | 0 | 0
Net Amount | 460 | 3,123
Other assets | Foreign currency forward contracts | Designated as Hedging Instrument |  |
Derivative Assets |  |
Gross Amounts of Recognized Assets | 64 |
Gross Amounts Offset in the Balance Sheet | 667 |
Net Amounts of Assets Presented in the Balance Sheet | (603) |
Collateral | 0 |
Net Amount | (603) |
Other assets | Credit default swaps | Not Designated as Hedging Instrument |  |
Derivative Assets |  |
Gross Amounts of Recognized Assets | 37 |
Gross Amounts Offset in the Balance Sheet | 0 |
Net Amounts of Assets Presented in the Balance Sheet | 37 |
Collateral | 0 |
Net Amount | 37 |
Other assets | Total return swaps | Not Designated as Hedging Instrument |  |
Derivative Assets |  |
Gross Amounts of Recognized Assets | 3,744 |
Gross Amounts Offset in the Balance Sheet | 0 |
Net Amounts of Assets Presented in the Balance Sheet | 3,744 |
Collateral | 3,601 |
Net Amount | 143 |
Other assets | Equity futures | Not Designated as Hedging Instrument |  |
Derivative Assets |  |
Gross Amounts of Recognized Assets | 291 | 1,390
Gross Amounts Offset in the Balance Sheet | 0 | 977
Net Amounts of Assets Presented in the Balance Sheet | 291 | 413
Collateral | 0 | 0
Net Amount | 291 | 413
Other liabilities | Interest rate futures | Not Designated as Hedging Instrument |  |
Derivative Liabilities |  |
Gross Amounts of Recognized Liabilities | 1,545 | 910
Gross Amounts Offset in the Balance Sheet | 122 | 636
Net Amounts of Liabilities Presented in the Balance Sheet | 1,423 | 273
Collateral Pledged | 1,423 | 273
Net Amount | 0 | 0
Other liabilities | Interest rate swaps | Not Designated as Hedging Instrument |  |
Derivative Liabilities |  |
Gross Amounts of Recognized Liabilities | 50 | 506
Gross Amounts Offset in the Balance Sheet | 0 | 0
Net Amounts of Liabilities Presented in the Balance Sheet | 50 | 506
Collateral Pledged | 50 | 254
Net Amount | 0 | 252
Other liabilities | Foreign currency forward contracts | Not Designated as Hedging Instrument |  |
Derivative Liabilities |  |
Gross Amounts of Recognized Liabilities | 3,808 | 4,154
Gross Amounts Offset in the Balance Sheet | 28 | 0
Net Amounts of Liabilities Presented in the Balance Sheet | 3,780 | 4,154
Collateral Pledged | 0 | 0
Net Amount | 3,780 | 4,154
Other liabilities | Foreign currency forward contracts | Not Designated as Hedging Instrument |  |
Derivative Liabilities |  |
Gross Amounts of Recognized Liabilities | 939 | 72
Gross Amounts Offset in the Balance Sheet | 622 | 71
Net Amounts of Liabilities Presented in the Balance Sheet | 317 | 1
Collateral Pledged | 0 | 0
Net Amount | 317 | 1
Other liabilities | Foreign currency forward contracts | Designated as Hedging Instrument |  |
Derivative Liabilities |  |
Gross Amounts of Recognized Liabilities | 1,818 |
Gross Amounts Offset in the Balance Sheet | 0 |
Net Amounts of Liabilities Presented in the Balance Sheet | 1,818 |
Collateral Pledged | 0 |
Net Amount | $ 1,818 |
Other liabilities | Credit default swaps | Not Designated as Hedging Instrument |  |
Derivative Liabilities |  |
Gross Amounts of Recognized Liabilities |  | 1,606
Gross Amounts Offset in the Balance Sheet |  | 0
Net Amounts of Liabilities Presented in the Balance Sheet |  | 1,606
Collateral Pledged |  | 1,605
Net Amount |  | 1
Other liabilities | Equity futures | Not Designated as Hedging Instrument |  |
Derivative Liabilities |  |
Gross Amounts of Recognized Liabilities |  | 977
Gross Amounts Offset in the Balance Sheet |  | 977
Net Amounts of Liabilities Presented in the Balance Sheet |  | 0
Collateral Pledged |  | 0
Net Amount |  | $ 0

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