Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Line Items]
Deferred Tax Assets, Net of Valuation Allowance	$ 102,688,000	$ 44,577,000
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	11,900,000	14,000,000
Deferred Tax Assets, Tax Credit Carryforwards, Research	$ 3,500,000	$ 3,700,000
U.S. federal statutory rate	35.00%	35.00%	35.00%
Effective income tax rate	27.90%	14.80%	19.20%
Income before income taxes, domestic operations	$ 84,800,000	$ 61,000,000	$ 79,400,000
Income before income taxes, foreign operations	126,600,000	95,900,000	75,800,000
Liabilities for uncertain income tax positions	41,218,000	32,536,000	34,635,000	$ 40,888,000
Prepaid tax payments	0	11,600,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	5,300,000	3,400,000	2,900,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	1,900,000	1,400,000	100,000
Undistributed Earnings of Foreign Subsidiaries	540,000,000
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions	0	(17,107,000)	(8,284,000)
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	37,000,000	29,800,000	$ 32,700,000
Foreign Tax Authority [Member]
Income Taxes [Line Items]
Tax Credit Carryforward, Valuation Allowance	11,900,000	14,000,000
California Franchise Tax Board [Member]
Income Taxes [Line Items]
Income Tax Examination, Year under Examination				2013	2012
Internal Revenue Service (IRS) [Member]
Income Taxes [Line Items]
Operating Loss Carryforwards	$ 144,000,000
Operating Loss Carryforwards, Expiration Dates	Dec. 31, 2036
Income Tax Examination, Year under Examination			2014	2013	2012
State and Local Jurisdiction [Member]
Income Taxes [Line Items]
Tax Credit Carryforward, Amount	$ 0	$ 600,000
New York City Department of Finance [Member]
Income Taxes [Line Items]
Tax Adjustments, Settlements, and Unusual Provisions	26,000
New York State Division of Taxation and Finance [Member]
Income Taxes [Line Items]
Income Tax Examination, Year under Examination				2013	2012	2011
EVDY [Member]
Income Taxes [Line Items]
Operating Loss Carryforwards	130,600,000
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax	$ 900,000