Subsequent events (Narrative) (Details) - Subsequent Event [Member] - Sunrise Growers, Inc. [Member] $ in Thousands	Oct. 09, 2015 USD ($)
Subsequent Event [Line Items]
Business Acquisition, Name of Acquired Entity	Sunrise Growers, Inc.
Business Acquisition, Description Of Acquired Entity	Sunrise Growers, Inc., ("Sunrise") is a processor, marketer, distributor and seller of conventional and organic frozen fruit.
Equity Method Investment, Ownership Percentage	100.00%
Business Acquisition, Date Of Acquisition Agreement1	Oct. 09, 2015
Payments To Acquire Businesses, Equity Issued	$ 95,500
Payments To Acquire Businesses, Loan Agreement	318,000
Payments To Acquire Businesses, Credit Facility	59,500
Other Payments To Acquire Businesses	21,000
Total cash consideration paid for acquisition of buiness	452,000
Secured debt, Second lien loan [Member]
Subsequent Event [Line Items]
Secured Long Term Debt	$ 330,000
Debt Conversion Original Debt Type Of Debt	If any Initial Loans remain outstanding on the first anniversary of the funding date (the “Interim Loan Conversion Date”) and no bankruptcy event of default then exists, all Initial Loans then outstanding automatically convert into term loans (such converted loans, the “Term Loans”), which would mature on the seventh anniversary of the funding date (the “Maturity Date”)
Debt Instrument, Interest Rate Terms	At the Company’s election, interest on the Initial Loans is initially determined by reference to either: (i) LIBOR (subject to a 1.0% per annum floor) plus an applicable margin of 6.0% per annum; or (ii) an alternate base rate specified in the Loan Agreement plus an applicable margin of 5.0%
Debt Instrument Interest Rate Stated Percentage Rate Range Maximum	9.50%
Debt Instrument Interest Rate Increase Decrease	0.50%
Debt Instrument, Description of Variable Rate Basis	The applicable margin increases by 0.50% at the end of each three-month period after the funding date until the Interim Loan Conversion Date
Secured debt, Second lien loan [Member] | London Interbank Offered Rate plus applicable margin [Member]
Subsequent Event [Line Items]
Debt Instrument Interest Rate Stated Percentage Rate Range Minimum	6.00%
Debt Instrument Interest Rate Stated Percentage Rate Range Maximum	9.50%
Secured debt, Second lien loan [Member] | Loan Agreement Base Interest Rate plus applicable margin [Member]
Subsequent Event [Line Items]
Debt Instrument Interest Rate Stated Percentage Rate Range Minimum	5.00%
Debt Instrument Interest Rate Stated Percentage Rate Range Maximum	9.50%