[["( in thousands )", "at december 31 , 2016", "at december 31 , 2015", "at december 31 , 2014", "at december 31 , 2013", "at december 31 , 2012"], ["cash and cash equivalents", "$ 250470", "$ 129852", "$ 593175", "$ 347489", "$ 341841"], ["working capital ( 1 )", "1279337", "1019953", "1127772", "702181", "651370"], ["inventories", "917491", "783031", "536714", "469006", "319286"], ["total assets", "3644331", "2865970", "2092428", "1576369", "1155052"], ["total debt including current maturities", "817388",