Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Line Items]
Capital loss carry-forwards	$ 23,746,000	$ 22,112,000
Foreign provision for income taxes	108,714,000	102,824,000	$ 64,252,000
Undistributed earnings	483,430,000
Unrecognized deferred tax liability related to temporary differences	10,506,000
Earnings retained by subsidiaries and equity accounted investments	500,430,000	484,510,000	469,000,000
Gross unrecognized tax benefits	20,232,000	22,584,000	$ 25,910,000
Unrecognized tax benefits that would impact effective tax rate	8,854,000	10,556,000
Accrued interest and penalties	3,569,000	4,170,000
Capital Loss Carryforward [Member]
Income Tax Disclosure [Line Items]
Capital loss carry-forwards	$ 39,981,209	$ 9,292,000