Current and Long-Term Financing (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Line of Credit Facility [Line Items]
Interest paid	$ 3,100,000	$ 3,100,000	$ 1,600,000
Interest capitalized	400,000	300,000	$ 200,000
Assets held as collateral	303,240,000	330,427,000
HBB
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 115,000,000
Line of credit facility, unused capacity, commitment fee percentage	0.25%
Dividend restriction from closing date	$ 5,000,000.0
Dividend restriction period following closing date of credit facility	30 days
Dividend restriction credit facility excess availability requirement	$ 15,000,000.0
Dividend restriction credit facility excess availability requirement as defined within the agreement	$ 25,000,000.0
HBB | Base Rate | US Dollar
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.00%
HBB | Base Rate | Canadian Dollar
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.00%
HBB | LIBOR Rate | US Dollar
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.75%
HBB | LIBOR Rate | Canadian Dollar
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.75%
Operating Segments | HBB
Line of Credit Facility [Line Items]
Assets held as collateral	$ 297,200,000
Interest Rate Swaps, Extending to January 2020 and January 2024 | HBB
Line of Credit Facility [Line Items]
Notional Amount	$ 35,000,000
Average Fixed Rate	1.50%
Delayed start interest rate swaps, Extending to January 2024 | HBB
Line of Credit Facility [Line Items]
Notional Amount	$ 10,000,000.0	$ 10,000,000
Average Fixed Rate	1.70%	1.70%