Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Foreign tax rate differential	(26.00%)	(7.60%)	(66.40%)
Other, net	(16.00%)	(0.80%)	3.90%
Valuation allowance	$ (14,303,000)	$ (17,562,000)	$ (22,067,000)		$ (3,028,000)
Foreign tax credits	11,300,000	16,800,000
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	9,400,000	37,300,000
State net operating losses	68,800,000	70,000,000.0
State tax credits	2,000,000.0	2,400,000
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	4.5
Tax Cuts and Jobs Act, Incomplete Accounting, Change in Tax Rate, Provisional Income Tax Benefit			500,000
Tax Cuts and Jobs Act, Change in Tax Rate, Income Tax Expense		10,900,000
Valuation Allowance, Deferred Tax Asset, Decrease, Amount	(2,838,000)	(34,000)	(167,000)
Unrecognized Tax Benefits	$ 630,000	593,000	3,014,000	$ 3,000,000
Accrued interest and penalties		0.0	400,000
Uncertain income tax position		600,000
Undistributed earnings of foreign subsidiaries		$ 196,400,000	$ 259,900,000