Annual report pursuant to Section 13 and 15(d)

Common and Preferred Stock Transfers out of accumulated comprehensive income (Details)

v3.8.0.1
Common and Preferred Stock Transfers out of accumulated comprehensive income (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Stockholders' Equity Attributable to Parent $ 527,403 $ 457,926 $ 468,544 $ 513,143
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax 8,483 808 (22,666)  
Foreign currency translation adjustments 7,845 808 (22,666)  
Accumulated other comprehensive loss (26,537) (34,382) (35,190) $ (12,524)
Accumulated Other Comprehensive (Loss)        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Foreign currency translation adjustments 7,845 808 (22,666)  
Other Income [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax $ (638) $ 0 $ 0