Debt Including Capital Lease Obligations - Carrying and Estimated Fair Value Table (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013		Jun. 30, 2013
Debt Instrument [Line Items]
Capital Lease Obligations	$ 42,558	[1]	$ 39,025	[1]	$ 14,250	[1]
Estimated Fair Value - Capital lease obligations	42,000	[1],[2]	39,000	[1],[2]	14,000	[1],[2]
Less current portion	(4,610)		(2,271)		(3,078)
Total long-term debt and capital lease obligations	632,492		629,353		598,725
4.25% Convertible Senior Notes
Debt Instrument [Line Items]
Carrying Value	170,053		164,050		158,400
Estimated Fair Value	200,000	[2]	194,000	[2]	192,000	[2]
Other debt [Member]
Debt Instrument [Line Items]
Estimated Fair Value	6,000	[2]
Other Long-term Debt	6,541
7.875% Senior Notes | Senior notes
Debt Instrument [Line Items]
Carrying Value	412,325		422,174		422,028
Estimated Fair Value	455,000	[2]	459,000	[2]	445,000	[2]
ABL Term Loan | ABL Term Loan
Debt Instrument [Line Items]
Carrying Value	5,625		6,375		7,125
Estimated Fair Value	5,000	[2]	6,000	[2]	7,000	[2]
Midwest [Member] | Warehouse In Service [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
Capital Lease Obligations	$ 42,000		$ 38,000		$ 39,000

[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

[2] The fair value of the senior notes is based on observable inputs, which include quoted prices for similar assets or liabilities in an active market and market-corroborated inputs (Level 2). All other debt may be traded on the secondary loan market, and the fair value is based on either the last available trading price, if recent, or trading prices of comparable debt (Level 3). See Note 9 for further discussion of fair value.