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DEBT (Narrative) (Details) - USD ($)
1 Months Ended 2 Months Ended 6 Months Ended
Apr. 28, 2016
Mar. 03, 2016
Aug. 05, 2015
Jun. 30, 2016
Aug. 31, 2015
Jun. 30, 2016
Jun. 30, 2016
Debt Instrument [Line Items]              
Debt carrying amount       $ 1,056,183,000   $ 1,056,183,000 $ 1,056,183,000
Revolving Credit Facility              
Debt Instrument [Line Items]              
Repayments of debt           105,000,000  
Unsecured Revolving Credit Agreement Expiring 2020              
Debt Instrument [Line Items]              
Debt instrument, term         5 years    
Basis points on periodic interest rate         1.25%    
Basis point credit line fee         0.175%    
Remaining borrowing capacity       194,500,000   194,500,000 $ 194,500,000
Revolving Credit Facility Due 2016              
Debt Instrument [Line Items]              
Maximum borrowing capacity         $ 200,000,000    
Farm Credit Facility              
Debt Instrument [Line Items]              
Maximum borrowing capacity         100,000,000    
Incremental Term Loan Agreement              
Debt Instrument [Line Items]              
Debt instrument, term 10 years           10 years
Debt carrying amount $ 300,000,000     $ 300,000,000   $ 300,000,000 $ 300,000,000
Basis points on periodic interest rate 1.90%            
Periodic effective interest rate       2.60%   2.60% 2.60%
Term Credit Agreement              
Debt Instrument [Line Items]              
Periodic effective interest rate       2.10%   2.10% 2.10%
Term Credit Agreement | Term Loan Facility              
Debt Instrument [Line Items]              
Debt instrument, term     9 years        
Debt carrying amount       $ 350,000,000   $ 350,000,000 $ 350,000,000
Basis points on periodic interest rate     1.625%        
Periodic effective interest rate       3.30%   3.30% 3.30%
Maximum borrowing capacity     $ 350,000,000        
Term Credit Agreement | Unsecured Revolving Credit Agreement Expiring 2020              
Debt Instrument [Line Items]              
Debt instrument, term     5 years        
Maximum borrowing capacity     $ 200,000,000   $ 200,000,000    
Term Credit Agreement | Line of Credit              
Debt Instrument [Line Items]              
Maximum borrowing capacity     $ 550,000,000        
Tranche A              
Debt Instrument [Line Items]              
Repayments of lines of credit   $ 155,000,000          
New Zealand JV Noncontrolling Interest              
Debt Instrument [Line Items]              
Debt carrying amount       $ 23,747,000   $ 23,747,000 $ 23,747,000
New Zealand JV Noncontrolling Interest | Long-term Debt              
Debt Instrument [Line Items]              
Increase in debt due to favorable changes in exchange rates             800,000
New Zealand JV | Working Capital Facility | Line of Credit              
Debt Instrument [Line Items]              
Remaining borrowing capacity       $ 28,400,000   28,400,000 28,400,000
Repayments of lines of credit             135,800,000
New Zealand JV | Working Capital Facility, 12 month | Working Capital Facility              
Debt Instrument [Line Items]              
Debt instrument, term       12 months      
Maximum borrowing capacity       $ 14,200,000   14,200,000 14,200,000
New Zealand JV | Working Capital Facility, 18 month | Working Capital Facility              
Debt Instrument [Line Items]              
Debt instrument, term       18 months      
Maximum borrowing capacity       $ 14,200,000   14,200,000 14,200,000
New Zealand JV | Working Capital Facility, Expired in June 2016 | Working Capital Facility              
Debt Instrument [Line Items]              
Maximum borrowing capacity       28,400,000   28,400,000 28,400,000
New Zealand JV | New Zealand JV Noncontrolling Interest              
Debt Instrument [Line Items]              
Repayments of debt             300,000
Standby Letters of Credit | Unsecured Revolving Credit Agreement Expiring 2020              
Debt Instrument [Line Items]              
Amount to secure outstanding letters of credit       $ 5,500,000   $ 5,500,000 $ 5,500,000
Interest rate swaps | Incremental Term Loan Agreement              
Debt Instrument [Line Items]              
Debt carrying amount $ 200,000,000            
Variable Interest Rate Portion | Incremental Term Loan Agreement              
Debt Instrument [Line Items]              
Debt carrying amount $ 100,000,000