Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting [Abstract]
Number of operating segments									4
Number of customers exceeding ten percent of net sales									0
Revenues from External Customers and Long-Lived Assets
Net Sales	$ 195,140	$ 188,541	$ 200,238	$ 168,092	$ 187,507	$ 178,268	$ 199,493	$ 173,712	$ 752,011	$ 738,980	$ 753,998
Long-Lived Assets	138,587				136,325				138,587	136,325	137,152
Equipment
Revenues from External Customers and Long-Lived Assets
Net Sales									444,773	435,900	452,398
Parts and consumables
Revenues from External Customers and Long-Lived Assets
Net Sales									176,442	175,782	177,999
Service and other
Revenues from External Customers and Long-Lived Assets
Net Sales									109,533	106,048	100,650
Specialty surface coatings
Revenues from External Customers and Long-Lived Assets
Net Sales									21,263	21,250	22,951
Americas
Revenues from External Customers and Long-Lived Assets
Net Sales									514,544	491,661	481,426
Long-Lived Assets	106,409				100,662				106,409	100,662	100,843
Europe, Middle East, Africa
Revenues from External Customers and Long-Lived Assets
Net Sales									157,208	166,208	188,338
Long-Lived Assets	28,296				31,164				28,296	31,164	31,126
Asia Pacific
Revenues from External Customers and Long-Lived Assets
Net Sales									80,259	81,111	84,234
Long-Lived Assets	$ 3,882				$ 4,499				$ 3,882	$ 4,499	$ 5,183