Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2013	Dec. 31, 2014
Income Tax Contingency [Line Items]
Amount in excess of the amount for financial reporting over the tax bases	$ 202,900
Deferred tax liabilities, undistributed foreign earnings	20,900
Deferred tax assets, operating loss carryforwards, foreign	9,300
Deferred tax assets, valuation allowance	603		$ 130
Valuation allowance, deferred tax asset, increase, amount	700
Deferred tax assets, operating loss carryforwards, state and local	1,600
Tax credit carryforwards	4,700
Tax benefit from effective settlement of 2009 and 2010 refund claims		$ 11,000
Significant change in unrecognized tax benefits is reasonably possible, amount of unrecorded benefit	400
Unrecognized tax benefits that would impact effective tax rate	10,500
Liability for penalties	1,900		1,600
Liability for interest	2,700		$ 2,700
Subject To Expiration [Member]
Income Tax Contingency [Line Items]
Tax credit carryforwards	4,000
Not Subject To Expiration [Member]
Income Tax Contingency [Line Items]
Tax credit carryforwards	700
Foreign Country [Member]
Income Tax Contingency [Line Items]
Net operating loss carryforwards	84,000
Foreign Country [Member] | Subject To Expiration [Member]
Income Tax Contingency [Line Items]
Net operating loss carryforwards	54,600
Federal Domestic [Member]
Income Tax Contingency [Line Items]
Net operating loss carryforwards	40,800
Operating Loss Carryforward With No Expiration Date [Member] | Foreign Country [Member]
Income Tax Contingency [Line Items]
Net operating loss carryforwards	29,400
Subject To Utilization Limitations [Member]
Income Tax Contingency [Line Items]
Tax credit carryforwards	$ 3,000
Earliest Tax Year [Member]
Income Tax Contingency [Line Items]
Tax credit carryforward, expiration date	Jan. 01, 2016
Earliest Tax Year [Member] | Foreign Country [Member]
Income Tax Contingency [Line Items]
Operating loss carryforwards, expiration date	Jan. 01, 2019
Earliest Tax Year [Member] | Federal Domestic [Member]
Income Tax Contingency [Line Items]
Operating loss carryforwards, expiration date	Jan. 01, 2020
Earliest Tax Year [Member] | State and Local Jurisdiction [Member]
Income Tax Contingency [Line Items]
Operating loss carryforwards, expiration date	Jan. 01, 2016
Latest Tax Year [Member]
Income Tax Contingency [Line Items]
Tax credit carryforward, expiration date	Dec. 31, 2035
Years open to examination	2015
Latest Tax Year [Member] | Foreign Country [Member]
Income Tax Contingency [Line Items]
Operating loss carryforwards, expiration date	Dec. 31, 2025
Latest Tax Year [Member] | Federal Domestic [Member]
Income Tax Contingency [Line Items]
Operating loss carryforwards, expiration date	Dec. 31, 2034
Latest Tax Year [Member] | State and Local Jurisdiction [Member]
Income Tax Contingency [Line Items]
Operating loss carryforwards, expiration date	Dec. 31, 2035
Tax Year 2013 [Member]
Income Tax Contingency [Line Items]
Years open to examination	2013
Tax Year 2014 [Member]
Income Tax Contingency [Line Items]
Years open to examination	2014
Valuation Allowance, Operating Loss Carryforwards [Member] | Foreign Country [Member]
Income Tax Contingency [Line Items]
Deferred tax assets, valuation allowance	$ 9,300