Income Taxes (Rate Reconciliation) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	$ 448	$ 1,168	$ 172	$ 846
Federal Statutory Income Tax Rate	21.00%	21.00%	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount	$ (521)	$ (7,967)	$ (632)	$ (7,967)
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent	(24.40%)	(143.20%)	(77.40%)	(197.70%)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	$ (1,796)	$ (743)	$ 1,468	$ 231
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent	(84.20%)	(13.40%)	179.70%	5.70%
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount	$ 1,923	$ 0	$ 1,923	$ 0
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Percent	90.20%	0.00%	235.40%	0.00%
Unrecognized Tax Benefits, Income Tax Penalties Expense	$ (2,284)	$ 1,024	$ 132	$ 2,688
Effective Income Tax Rate Reconciliation, Tax Contingency, Domestic, Percent	(107.10%)	18.40%	16.20%	66.70%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount	$ (27)	$ 469	$ (27)	$ (735)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent	(1.30%)	8.40%	(3.30%)	(18.20%)
Subpart F Income	$ 2,253	$ 18,657	$ 3,848	$ 18,657
Unrecognized Tax Benefits		$ 52,100		$ 52,100
Subpart F Income, Percent	105.70%	335.40%	471.00%	463.00%
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount	$ 90	$ 63	$ 254	$ (60)
Effective Income Tax Rate Reconciliation,Other Reconciling Items, Percent	4.20%	1.10%	31.10%	(1.50%)
Income tax expense (benefit)	$ 86	$ 12,671	$ 7,138	$ 13,660
Effective Income Tax Rate	4.10%	227.70%	873.70%	339.00%