Segment Information (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010 Predecessor	Sep. 30, 2012 United States	Sep. 30, 2011 United States	Sep. 30, 2010 United States Predecessor	Sep. 30, 2012 United Kingdom	Sep. 30, 2011 United Kingdom	Sep. 30, 2010 United Kingdom Predecessor	Sep. 30, 2012 Canada	Sep. 30, 2011 Canada	Sep. 30, 2010 Canada Predecessor	Sep. 30, 2012 Netherlands	Sep. 30, 2011 Netherlands	Sep. 30, 2010 Netherlands Predecessor	Sep. 30, 2012 Ireland	Sep. 30, 2011 Ireland	Sep. 30, 2010 Ireland Predecessor	Sep. 30, 2012 Other foreign countries	Sep. 30, 2011 Other foreign countries	Sep. 30, 2010 Other foreign countries Predecessor
Net sales by location of customer:
Consolidated net sales	$ 749,222	$ 782,316	$ 752,986	$ 715,209	$ 726,077	$ 740,897	$ 684,261	$ 713,192	$ 2,999,733	$ 2,864,427	$ 2,705,837	$ 1,922,549	$ 1,898,535	$ 1,870,622	$ 653,170	$ 596,927	$ 516,200	$ 111,047	$ 95,639	$ 81,335	$ 84,167	$ 80,221	$ 65,591	$ 33,341	$ 33,774	$ 24,567	$ 195,459	$ 159,331	$ 147,522