Income Taxes Income Taxes (Foreign) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure Foreign [Abstract]
Effective Income Tax Rate Reconciliation, Tax Contingency, Domestic, Percent	25.00%	25.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%		21.00%	35.00%
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent		15.50%
Effective Income Tax Rate Reconciliation, Tax Settlement, Percent		38.00%		20.00%
Effective Income Tax Rate Reconciliation, Tax Settlement, Foreign, Amount		$ 6,500
Deferred Foreign Income Tax Expense (Benefit)	$ 6,600	$ 1,400	$ 2,690	$ (9,282)	$ 0