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Commitments, Contingencies and Guarantees (Tables)
12 Months Ended
Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Future Minimum Rental Payments for Operating Leases
Minimum rental commitments for the rental of office and production premises and equipment under non-cancellable leases net of sublease income, some of which provide for rental adjustments due to increased property taxes and operating costs for 2015 and thereafter, are as follows:
Period
 
Amount
2015
 
$
41,871

2016
 
39,006

2017
 
33,740

2018
 
31,168

2019
 
26,472

2020 and thereafter
 
62,644

  
 
$
234,901