Acquistion (Details) (Water Star, Inc., USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Water Star, Inc.
Business Combinations
Business Acquisition, Effective Date of Acquisition	May 31, 2011
Business Combination, Cost of Acquired Entity, Purchase Price				$ 4,456
Payments to Acquire Businesses, Gross		750	750	2,956
Number of installment payments paid	2
Amount of installment payment paid	$ 750