Short-Term Borrowings, Long-Term Debt, and Interest Expense - Derivatives and AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Gain/(Loss) Recognized in AOCI on Derivative	$ (164)	$ 0	$ (2,927)	$ 0
Interest Rate Swap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Gain/(Loss) Recognized in AOCI on Derivative	(164)	0	(2,927)	0
Interest Income/(Expense)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Gain/(Loss) Reclassified from AOCI into Income	(162)	0	(302)	0
Interest Income/(Expense) | Interest Rate Swap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Gain/(Loss) Reclassified from AOCI into Income	$ (162)	$ 0	$ (302)	$ 0