Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Loss Carryforwards [Line Items]
Income tax benefit from Tax Act		$ 39,000
Remeasurement of U.S. deferred tax liability		130,000
U.S. tax on unremitted earnings	$ (23,711)	90,916	$ 0
Adjustment to provisional tax	37,000
Remeasurement of deferred tax assets and liabilities	13,000
Tax benefits from IRS tax settlements and resolution of U.S. tax examinations	17,000	30,000	15,000
Goodwill impairment			58,000
Valuation allowance on tax attribute carryovers			6,000
Net operating loss carryforwards	258,000
Indefinite lived net operating loss carryforwards	$ 211,000
Operating loss carryforwards, expiration period	15 years
Tax credit carry forwards	$ 64,148	82,285
Tax credit carry forward without expiration	50,000
Foreign earnings reinvested	724,000
Undistributed earnings	301,000
Tax liability, undistributed earnings	13,000
Unrecognized tax benefits that would affect the effective tax rate if recognized	$ 65,000	74,000	104,000
Possible change to unrecognized tax benefits	30.00%
Interest and penalties	$ (1,000)	(4,000)	$ (1,000)
Income tax interest and penalties accrued		$ 4,000
Minimum
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards, expiration period	5 years
Maximum
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards, expiration period	15 years