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Debt - Narratives (Details) - USD ($)
3 Months Ended 9 Months Ended
Jan. 22, 2018
Aug. 26, 2015
Mar. 31, 2018
Mar. 31, 2017
Sep. 30, 2016
Dec. 31, 2017
Additional Debt Disclosures            
Repayments of mortgage debt $ 6,100,000   $ 12,925,000 $ 243,403,000    
Line of credit, maximum borrowing capacity   $ 250,000,000        
Commitment fee threshold   50.00%        
Credit facility fees   $ 1,900,000        
Debt and capital lease obligation     92,323,000     $ 101,931,000
Proceeds from senior credit facility     8,052,000 33,878,000    
Repayments of credit facility     19,840,000 0    
Restriction payment threshold     100,000,000.0      
Debt scheduled to mature in 2018     151,430,000      
Effects of foreign currency translation on balance sheet item     26,935,000 $ 8,609,000    
Non-recourse debt            
Additional Debt Disclosures            
Effects of foreign currency translation on balance sheet item     18,200,000      
Revolver            
Additional Debt Disclosures            
Line of credit, maximum borrowing capacity   $ 200,000,000        
Debt maturity date   Aug. 26, 2018        
Debt scheduled to mature in 2018     42,400,000      
Revolver | Accordion            
Additional Debt Disclosures            
Line of credit, maximum borrowing capacity   $ 250,000,000        
Term Loan            
Additional Debt Disclosures            
Line of credit, maximum borrowing capacity   $ 50,000,000        
Debt maturity date         Aug. 26, 2018  
Debt and capital lease obligation     49,948,000   $ 50,000,000 $ 49,915,000
Debt scheduled to mature in 2018     $ 50,000,000      
Term Loan | LIBOR            
Additional Debt Disclosures            
Basis spread     1.45%   1.45%  
Minimum            
Additional Debt Disclosures            
Debt maturity date     Dec. 31, 2017      
Credit facility fee, rate   0.15%        
Minimum | Revolver | Euro Currency Rate            
Additional Debt Disclosures            
Interest rate on debt   1.50%        
Minimum | Revolver | Base Rate            
Additional Debt Disclosures            
Interest rate on debt   0.50%        
Minimum | Term Loan | Euro Currency Rate            
Additional Debt Disclosures            
Interest rate on debt   1.45%        
Minimum | Term Loan | Base Rate            
Additional Debt Disclosures            
Interest rate on debt   0.45%        
Maximum            
Additional Debt Disclosures            
Debt maturity date     Dec. 31, 2031      
Credit facility fee, rate   0.30%        
Maximum | Revolver | Euro Currency Rate            
Additional Debt Disclosures            
Interest rate on debt   2.25%        
Maximum | Revolver | Base Rate            
Additional Debt Disclosures            
Interest rate on debt   1.25%        
Maximum | Term Loan | Euro Currency Rate            
Additional Debt Disclosures            
Interest rate on debt   2.20%        
Maximum | Term Loan | Base Rate            
Additional Debt Disclosures            
Interest rate on debt   1.20%        
Fixed interest rate | Minimum            
Additional Debt Disclosures            
Interest rate on mortgage loan     1.90%      
Fixed interest rate | Maximum            
Additional Debt Disclosures            
Interest rate on mortgage loan     7.40%      
Variable interest rate | Minimum            
Additional Debt Disclosures            
Interest rate on mortgage loan     1.30%      
Variable interest rate | Maximum            
Additional Debt Disclosures            
Interest rate on mortgage loan     6.00%