Credit Risk (Changes in the Allowance for Doubtful Accounts) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of period	$ 1,060
(Reversed) to expense	(25)	$ (9)
Write-offs, net of amounts recovered	(100)
Foreign currency translation adjustment	10
Balance at end of period	$ 945