Related Party Transactions - Transactions with Related Individuals (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Father of Management
Related Party Transaction [Line Items]
Paid to individual	$ 0.1	$ 0.2
Former Chairman Of The Board, Chief Executive Officer And President And Non-Executive Chief Strategy Officer
Related Party Transaction [Line Items]
Purchases from related party	$ 0.4
Industrial Electronic Controls | Former Chairman Of The Board, Chief Executive Officer And President And Non-Executive Chief Strategy Officer
Related Party Transaction [Line Items]
Percent of noncontrolling interest	50.00%