Summary of Significant Accounting Policies, Uncertain Tax Positions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Minimum [Member]
Uncertain Tax Positions [Abstract]
Estimate of change in gross unrecognized tax benefits, net of foreign adjustments	$ 0
Maximum [Member]
Uncertain Tax Positions [Abstract]
Estimate of change in gross unrecognized tax benefits, net of foreign adjustments	1,000
U.S. Federal, State and Foreign Jurisdictions [Member]
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Gross balance at beginning of year	5,987	$ 7,484	$ 9,045
Increases related to prior year tax positions	1,677	0	0
Increases related to current year tax positions	1,119	2,700	1,188
Settlements	0	0	(1,671)
Decreases due to lapse of statutes of limitations	(667)	(4,106)	(1,086)
Currency adjustments			8
Currency adjustments	(344)	(91)
Gross balance at end of year	7,772	5,987	7,484
Unrecognized tax benefits that would impact effective tax rate	900	1,100
Uncertain Tax Positions [Abstract]
Interest and penalties expenses/(benefits)	400	400	(100)
Accrued interest and penalties	$ 1,700	$ 1,300	$ 900