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Derivative Instruments - Narrative (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Forward foreign exchange contracts    
Derivative [Line Items]    
Forward foreign exchange contracts with credit risk-related contingent features, notional value $ 23,100 $ 25,700
Additional collateral required, if TCF was rated less than BB- by Standard and Poor's 462 462
Forward foreign exchange contracts with credit risk-related contingent features, net liability amount 0 $ 0
Cash collateral posted 4,800  
Interest rate contracts    
Derivative [Line Items]    
Cash collateral posted 54,600  
Other contracts    
Derivative [Line Items]    
Cash collateral posted $ 1,300