Income Taxes (Income Tax Rate Reconciliation) (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Tax provision at U.S. statutory rate	21.00%	21.00%	35.00%
State income taxes	2.70%	2.30%	1.60%
Uncertain tax positions	0.40%	2.60%	1.60%
Valuation allowance	1.20%	(47.10%)	3.30%
Tax exempt interest	(3.00%)	(1.40%)	(10.60%)
Foreign tax rate differential	0.70%	2.90%	(6.70%)
Impact of foreign earnings, net	1.60%	(1.70%)	37.00%
Tax incentives	(9.60%)	(6.20%)	(6.60%)
Intercompany sale of assets	0.00%	35.50%	0.00%
Other – net	1.70%	(0.30%)	(0.50%)
Rate change	(18.10%)	0.00%	(22.90%)
Goodwill impairment	7.80%	0.00%	0.00%
Federal R&D tax credit	(1.20%)	(0.80%)	(1.00%)
Stock compensation	(1.50%)	(0.70%)	(1.00%)
Effective income tax rate	3.70%	6.10%	29.20%