Dividends (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	12 Months Ended
Dec. 28, 2012	Dec. 31, 2012	Sep. 30, 2013
Dividends
Special cash dividend declared(in dollars per share)		$ 1.00
Special cash dividend paid (in dollars)	$ 9,785		$ 9,785

Special cash dividends declared during the period for each share of common stock outstanding.

No definition available.

Name:	nutr_SpecialCashCommonStockDividendsPerShareDeclared
Namespace Prefix:	nutr_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration