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Derivative Instruments - Narrative (Details) - USD ($)
Jun. 30, 2020
Dec. 31, 2019
Interest rate contracts    
Derivative [Line Items]    
Cash collateral posted $ 85,300,000  
Forward foreign exchange contracts    
Derivative [Line Items]    
Forward foreign exchange contracts with credit risk-related contingent features, notional value 11,000,000.0 $ 23,100,000
Additional collateral required, if TCF was rated less than BB- by Standard and Poor's 221,000 462,000
Forward foreign exchange contracts with credit risk-related contingent features, net liability amount 0 $ 0
Cash collateral posted 1,000,000.0  
Cash collateral received $ 4,100,000