Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jan. 06, 2015	Dec. 31, 2013
Operating Loss Carryforwards [Line Items]
Undistributed Earnings of Foreign Subsidiaries	$ 450,700
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ (2,200)	$ (1,861)
Effective Income Tax Rate Reconciliation, Percent	1.70%	8.10%	17.90%
Income Tax Expense (Benefit)	$ 1,637	$ 7,106	$ 13,894
Foreign	3,266	4,789	32
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	771	738
Reserve for potential uncertain income tax return positions	3,265	3,115	3,020		$ 12,742
Portion of an unrecognized tax benefit netted against deferred tax asset for net operating loss carry forwards	$ 341	341
India
Operating Loss Carryforwards [Line Items]
Foreign income tax holiday, term	5 years
Income Tax Holiday, Aggregate Dollar Amount		13,600	$ 20,500
India | Minimum Alternative Tax (“MAT”)
Operating Loss Carryforwards [Line Items]
Foreign income tax holiday, term	10 years
Tax Year 2008-2012 [Member]
Operating Loss Carryforwards [Line Items]
Income Tax Audit, Cash Settlement				$ 20,500
Income Tax Examination, Penalties Expense		$ 1,600
Tax Year 2013 [Member]
Operating Loss Carryforwards [Line Items]
Income Tax Audit, Cash Settlement				$ 320
Maximum [Member] | India
Operating Loss Carryforwards [Line Items]
Foreign tax holiday (percentage)	100.00%
Minimum [Member] | India
Operating Loss Carryforwards [Line Items]
Foreign tax holiday (percentage)	50.00%