Debt Including Capital Lease Obligations - Build-to-suit Lease (Details) (USD $)					1 Months Ended		16 Months Ended
	Jun. 30, 2013		Dec. 31, 2012	Jun. 30, 2012	Jun. 30, 2012 U.S. Midwest Salad production and warehousing facility renewal_option facility	Jun. 30, 2013 U.S. Midwest Salad production and warehousing facility Property, plant and equipment	Sep. 30, 2013 U.S. Midwest Salad production and warehousing facility Expected contribution in Q3 2013	Jun. 30, 2013 U.S. Midwest Portion placed into service Long-term debt and capital lease obligations	Jun. 30, 2013 U.S. Midwest Construction in progress Other liabilities
Capital Leased Assets [Line Items]
Lease term					20 years
Number of facilities that the leased facility will replace					3
Number of lease extensions					2
Lease extension term					5 years
Capital leased asset						$ 39,000,000
Capital lease obligations	14,250,000	[1]	755,000	827,000				14,000,000	25,000,000
Total build-to-suit lease construction costs							$ 40,000,000

[1] Capital lease obligations include the portion of the borrowings for the salad production and warehousing facility in the Midwest that has been placed into service. The facility is being constructed under a build-to-suit lease with the construction in progress liability included in "Accrued liabilities" and "Other liabilities" on the Condensed Consolidated Balance Sheets and then reclassified to capital lease obligation as the related leased assets are placed into service. See further description of the build-to-suit lease below.