Dividend (Details)  | 
 Jul. 02, 2015  
$ / shares 
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| Subsequent events. | |
| Cash dividend declared (in dollars per share) | $ 0.045 | 
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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- References No definition available. 
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