Debt Including Capital Lease Obligations - Build-to-suit Lease (Details)		1 Months Ended
		Jun. 30, 2012 renewal_option	Sep. 30, 2015 USD ($)	Apr. 01, 2015	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)
Capital Leased Assets [Line Items]
Carrying Value - Capital lease obligations	[1]		$ 40,192,000		$ 41,891,000	$ 42,142,000
Midwest [Member] | Salad production and warehousing facility
Capital Leased Assets [Line Items]
Lease term		20 years
Number of lease extensions | renewal_option		2
Lease extension term		5 years
Lessee Leasing Arrangements, Capital Leases, Discount Rate				6.40%
Midwest [Member] | Warehouse In Service [Member] | Long-term Debt [Member]
Capital Leased Assets [Line Items]
Capital Lease Obligations, Current			1,000,000		1,000,000	1,000,000
Carrying Value - Capital lease obligations			$ 40,000,000		$ 41,000,000	$ 42,000,000

[1] Capital lease obligations include the borrowings for the salad production and warehousing facility in the Midwest. See further description of the build-to-suit lease below