Business Combinations (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	12 Months Ended	1 Months Ended
	Apr. 22, 2013	Aug. 30, 2014	Jan. 31, 2012 ATS Industrial Supply [Member]
Business Acquisition [Line Items]
Purchase price	$ 547,335		$ 32,204
Post-closing working capital adjustment		$ 1,434