Derivative Financial Instruments (Schedule of Interest Rate Derivatives) (Details) - HBB - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Interest Rate Swaps, Extending to January 2020
Derivative [Line Items]
Notional Amount	$ 20,000,000	$ 20,000,000
Average Fixed Rate	1.40%	1.40%
Interest Rate Swaps, Extending to January 2024
Derivative [Line Items]
Notional Amount	$ 15,000,000	$ 15,000,000
Average Fixed Rate	1.60%	1.60%
Delayed Start Interest Rate Swaps, Extending to January 2024
Derivative [Line Items]
Notional Amount	$ 10,000,000	$ 10,000,000
Average Fixed Rate	1.70%	1.70%