Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill and Other Intangible Assets [Line Items]
Goodwill, impairment		$ 2,500,000
Amortization expense	$ 1,700,000	1,700,000	$ 1,900,000
Trade names
Goodwill and Other Intangible Assets [Line Items]
Impairment of indefinite-lived intangible assets	0	$ 300,000	$ 0
Dynamic Systems Inc.
Goodwill and Other Intangible Assets [Line Items]
Finite-lived intangible assets acquired	14,600,000
Amortization expense	200,000
Dynamic Systems Inc. | Trade names
Goodwill and Other Intangible Assets [Line Items]
Indefinite-lived intangible assets acquired	$ 3,300,000