Income Taxes (Deferred Tax Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Operating Loss Carryforwards [Line Items]
Undistributed earnings attributable to foreign subsidiaries	$ 178,000
Unremitted earnings for which taxes have not been provided	208,100
Valuation allowance	90,900	$ 56,572
Deferred tax assets for US federal tax carryforwards, net operating losses and foreign tax credits	57,300	21,900
US state tax net operating loss carryforwards	9,400	7,000
Foreign tax carryforwards, net operating losses and foreign tax credits	39,300	$ 20,700
Significant increases in tax carryforwards resulting from current year tax positions	17,700
Certain European, South American and Asian jurisdictions [Member]
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards	$ 18,200