Accumulated Other Comprehensive Income (Loss) - Amounts Reclassified Out of AOCI into Income Statement (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Jun. 30, 2015
Jun. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                          
Interest expense, net $ 5,300     $ 3,992         $ 14,918 $ 11,199      
Cost of goods sold 1,166,402 $ 1,131,680 $ 1,131,980 1,203,246 $ 1,124,485 $ 1,073,261     3,430,062 3,400,992 $ 4,524,676 $ 4,297,952 $ 4,303,778
Warehousing, marketing and administrative expenses 172,159 156,912 197,581 148,831 142,870 146,837     526,653 438,538 595,673 580,141 573,645
Tax provision (20,017) (18,595) (3,982) (23,647) (18,327) (11,375)     (42,594) (53,349) (70,773) (73,507) (66,526)
Net income 27,667 $ 29,834 $ (6,007) $ 40,231 $ 30,522 $ 19,292 $ 23,827 $ 49,814 51,492 $ 90,045 $ 112,115 $ 122,053 $ 112,881
Amount Reclassified From AOCI [Member]                          
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                          
Net income 12,314               14,618        
Amount Reclassified From AOCI [Member] | Cash Flow Hedges [Member]                          
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                          
Cost of goods sold 4               4        
Tax provision (134)               (401)        
Net income 219               655        
Amount Reclassified From AOCI [Member] | Foreign Currency Translation [Member]                          
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                          
Warehousing, marketing and administrative expenses 11,132               11,132        
Amount Reclassified From AOCI [Member] | Defined Benefit Pension Plans [Member]                          
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                          
Warehousing, marketing and administrative expenses 1,573               4,623        
Tax provision (610)               (1,792)        
Net income 963               2,831        
Amount Reclassified From AOCI [Member] | Interest Rate Swap [Member] | Cash Flow Hedges [Member]                          
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                          
Interest expense, net $ 349               $ 1,052