Acquisitions (Details) (Water Star, Inc., USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	May 31, 2011
Water Star, Inc.
Business Acquisition
Business acquisition, effective date of acquisition	May 31, 2011
Business acquisition, cost of acquired entity, purchase price		$ 4,456
Payments to acquire business, gross	2,956
Number of installment payments paid	2
Amount of each installment payment paid	750
Business Acquisition, Purchase Price Allocation
Current Assets		426
Property, Plant and Equipment, Net		167
Identified Intangible Assets		3,800
Goodwill		472
Total Assets Acquired		4,865
Current Liabilities		409
Total Liabilities Assumed		409
Net Assets Acquired		$ 4,456