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Subsequent events (Details)
0 Months Ended 0 Months Ended
Apr. 06, 2012
Revolving credit facility
USD ($)
Apr. 01, 2014
Subsequent events
Elfa
Term loan facility
USD ($)
Apr. 01, 2014
Subsequent events
Elfa
Term loan facility
SEK
Apr. 01, 2014
Subsequent events
Elfa
Term loan facility
STIBOR
Apr. 01, 2014
Subsequent events
Elfa
Revolving credit facility
USD ($)
Apr. 01, 2014
Subsequent events
Elfa
Revolving credit facility
SEK
Apr. 01, 2014
Subsequent events
Elfa
Revolving credit facility
Nordea's base rate
Subsequent events              
Maximum borrowing capacity $ 75,000,000 $ 9,300,000 60,000,000   $ 21,700,000 140,000,000  
Quarterly principal payments   $ 500,000 3,000,000        
Reference rate       STIBOR     Nordea's base rate
Interest rate margin (as a percent)       1.70%     1.40%