Subsequent Events (Details) (Subsequent Event [Member], USD $) In Thousands, unless otherwise specified	0 Months Ended		0 Months Ended
	Dec. 03, 2013 Bekaert Business [Member]	Dec. 03, 2013 PT Bekaert Advanced Filtration [Member]	Dec. 16, 2013 General Electric Company Power and Water Division [Member]
Subsequent Event [Line Items]
Business acquisition, effective date of acquisition	Dec. 03, 2013
Business acquisition, percentage of voting interests acquired	100.00%	100.00%
Payments to acquire businesses	$ 7,402		$ 258,692