Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Line Items]
Valuation allowance	$ 2,933,000	$ 6,418,000
Valuation allowance decreased	3,500,000
Net current period other comprehensive income (loss)	$ 8,000	$ (10,000)	$ (126,000)
Tax at federal statutory rate	21.00%	21.00%	21.00%	35.00%
Possible reduction in liabilities for uncertain tax positions	$ 500,000
Unrecognized tax benefits that would impact effective tax rate	7,800,000
Unrecognized tax benefits, income tax penalties and interest expense	200,000	$ (1,400,000)	$ 100,000
Unrecognized tax benefits, income tax penalties and interest accrued	2,300,000	$ 2,000,000.0
Undistributed earnings	6,100,000
Associated tax without consideration of foreign tax credit	1,300,000
State and Local Jurisdiction
Income Tax Disclosure [Line Items]
Valuation allowance	$ 5,200,000
State and Local Jurisdiction | Earliest Tax Year
Income Tax Disclosure [Line Items]
Income tax examination, year under examination	2018
State and Local Jurisdiction | Latest Tax Year
Income Tax Disclosure [Line Items]
Income tax examination, year under examination	2017
State and Local Jurisdiction | Tax Year 2016
Income Tax Disclosure [Line Items]
Income tax examination, year under examination	2016
US Federal
Income Tax Disclosure [Line Items]
Operating loss carryforwards	$ 4,000,000.0
Operating loss carryforwards expiration year	2021
ITALY | Earliest Tax Year
Income Tax Disclosure [Line Items]
Income tax examination, year under examination	2004
ITALY | Latest Tax Year
Income Tax Disclosure [Line Items]
Income tax examination, year under examination	2012
Internal Revenue Service (IRS) | Earliest Tax Year
Income Tax Disclosure [Line Items]
Income tax examination, year under examination	2018