Debt Including Capital Lease Obligations - Carrying and Estimated Fair Value Table (Details) - USD ($) $ in Thousands		Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014
Debt Instrument [Line Items]
Capital Lease Obligations	[1]	$ 40,970	$ 41,891	$ 42,558
Estimated Fair Value - Capital lease obligations	[1],[2]	40,900	41,800	42,000
Less current portion		(3,263)	(4,703)	(4,610)
Total long-term debt and capital lease obligations		277,957	637,518	632,492
7.875% Senior Notes | 7.875% Senior Notes
Debt Instrument [Line Items]
Carrying Value		190,277	412,483	412,325
Estimated Fair Value	[2]	205,000	447,000	455,000
4.25% Convertible Senior Notes | Convertible debt
Debt Instrument [Line Items]
Carrying Value		45,002	176,431	170,053
Estimated Fair Value	[2]	45,000	200,000	200,000
2013 ABL Term Loan [Member]
Debt Instrument [Line Items]
Carrying Value			4,875	5,625
Estimated Fair Value	[2]		4,800	5,000
Other Debt Obligations
Debt Instrument [Line Items]
Carrying Value		4,971	6,541	6,541
Estimated Fair Value	[2]	$ 4,900	$ 6,500	$ 6,000

[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 8 for further discussion of fair value.