Income Taxes (Rate Reconciliation) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	$ 422	$ 542
Federal Statutory Income Tax Rate	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount	$ 85	$ 0
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent	4.20%	0.00%
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	$ 3,319	$ 2,882
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent	165.30%	111.70%
Unrecognized Tax Benefits, Income Tax Penalties Expense	$ 1,192	$ 702
Effective Income Tax Rate Reconciliation, Tax Contingency, Domestic, Percent	59.40%	27.20%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount	$ 0	$ (1,543)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent	0.00%	(59.80%)
Subpart F Income	$ 711	$ 0
Subpart F Income, Percent	35.30%	0.00%
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount	$ 81	$ (41)
Effective Income Tax Rate Reconciliation,Other Reconciling Items, Percent	4.10%	(1.60%)
Income tax expense (benefit)	$ 5,810	$ 2,542
Effective Income Tax Rate	289.30%	98.50%