Segment Reporting - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified			6 Months Ended			6 Months Ended			6 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Wet Automotive Ag	Jun. 30, 2013 Wet Automotive Ag	Sep. 30, 2014 Wet Automotive Ag	Jun. 30, 2014 Industrial Segments	Jun. 30, 2013 Industrial Segments	Sep. 30, 2014 Industrial Segments	Jun. 30, 2014 Reconciling Items	Jun. 30, 2013 Reconciling Items
Segment Reporting Information [Line Items]
Computer Technology Costs			$ 2,800	$ 2,600		$ 2,800	$ 2,600		$ 2,800	$ 2,600
Goodwill	$ 30,264	$ 25,809			$ 23,663			$ 6,601