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Segment and Geographic Information (Details 1) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jul. 31, 2016
Jul. 31, 2015
Jul. 31, 2016
Jul. 31, 2015
Jan. 31, 2016
Revenues From External Customers And Long Lived Assets [Line Items]          
Net sales $ 128,086 $ 145,569 $ 242,149 $ 266,030  
Operating (Loss) / Income 10,091 18,234 15,469 25,109  
Total Assets 598,736 590,011 598,736 590,011 $ 585,170
Property, Plant and Equipment, Net 35,726 42,723 35,726 42,723 38,553
United States          
Revenues From External Customers And Long Lived Assets [Line Items]          
Net sales 66,823 [1] 78,772 [1] 126,880 143,356  
Operating (Loss) / Income (392) [1] 7,948 [1] (1,785) 10,377  
Total Assets 221,081 230,209 221,081 230,209 215,053
Property, Plant and Equipment, Net 21,686 25,052 21,686 25,052 24,517
International          
Revenues From External Customers And Long Lived Assets [Line Items]          
Net sales 61,263 [2] 66,797 [2] 115,269 122,674  
Operating (Loss) / Income 10,483 [2] 10,286 [2] 17,254 14,732  
Total Assets 377,655 359,802 377,655 359,802 370,117
Property, Plant and Equipment, Net $ 14,040 $ 17,671 $ 14,040 $ 17,671 $ 14,036
[1] The United States operating loss included $10.0 million and operating income included $9.5 million of unallocated corporate expenses for the three months ended July 31, 2016 and 2015, respectively. The United States operating loss included $18.7 million and operating income included $16.6 million of unallocated corporate expenses for the six months ended July 31, 2016 and 2015, respectively.
[2] The International operating income included $9.4 million and $10.9 million of certain intercompany profits related to the Company’s supply chain operations for the three months ended July 31, 2016 and 2015, respectively. The International operating income included $16.5 million and $19.7 million of certain intercompany profits related to the Company’s supply chain operations for the six months ended July 31, 2016 and 2015, respectively.