Fair Value Measurements - Additional Information (Details) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
	Mar. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of long-lived assets		$ 800,000
Impairment of right-of-use asset	$ 400,000
Selling price of long-lived asset		300,000
Goodwill impairment		27,074,000	$ 0
Electrical Systems
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of long-lived assets		1,100,000
Impairment of right-of-use asset		400,000
Electrical Systems | Property, Plant and Equipment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of right-of-use asset		700,000
Interest rate swap agreement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional amount		$ 80,000,000