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Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Summary of Significant Accounting Policies [Abstract]
Accumulated Other Comprehensive Loss, Foreign Currency Translation Adjustment, Net of Tax	$ 19,371	$ 44,444	$ 44,585	$ 32,090
Restricted Cash	$ 1,292	517	640
Impairment of Long-Lived Assets		$ 0	11,199	0
Number of shares authorized to be repurchased under our stock repurchase programs		1,395,049
Machine warranty, range minimum (in years)	1 year	1 year
Machine warranty, range maximum (in years)	4 years	4 years
Advertising Costs		$ 7,269	$ 7,418	$ 8,583
Buildings and improvements
Property, Plant and Equipment
Property, Plant and Equipment, Useful life, Average		30 years
Property, Plant and Equipment, Other Types | Minimum
Property, Plant and Equipment
Property, Plant and Equipment, Useful life, Average		3 years
Property, Plant and Equipment, Other Types | Maximum
Property, Plant and Equipment
Property, Plant and Equipment, Useful life, Average		15 years

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The maximum period of time the machine is under warranty.

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Summary of Significant Accounting Policies

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Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.

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Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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