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Derivatives (Offsetting of Derivatives) (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Assets |  |
Gross Amounts Recognized | $ 330,316 | $ 107,816
Less: Master Netting Arrangements | (121,561) | (31,569)
Less: Cash collateral received or paid | (3,758) | (13,577)
Derivative asset, after netting | 204,997 | 62,670
Less: Security Collateral Received | 0 | (13,975)
Net derivative assets | 204,997 | 48,695
Derivative assets subject to master netting arrangements, gross amounts recognized | 328,700 | 105,900
Contracts not subject to master netting arrangements, gross amounts recognized | 1,600 | 2,000
Derivative, cash collateral received, including amount offset by fair value assets, and excess cash amount | 3,800 | 15,800
Liabilities |  |
Gross Amounts Recognized | 256,528 | 118,305
Less: Master Netting Arrangements | (121,561) | (31,569)
Less: Cash collateral received/paid | (38,238) | (6,833)
Derivative liability, after netting | 96,729 | 79,903
Less: Security Collateral Pledged | (79,619) | (11,231)
Net derivative liabilities | 17,110 | 68,672
Derivative liability subject to master netting arrangements, gross amounts recognized | 256,500 | 118,200
Contracts not subject to master netting arrangements, gross amounts recognized | 20 | 102
Derivative, cash collateral posted against derivative liabilities, including amount offset the derivative fair value liabilities, and excess cash amount | $ 43,000 | $ 8,400

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