Merchandise Inventories - Additional Information (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Inventory Disclosure [Abstract]
Merchandise inventories	$ 771,663,000	$ 763,756,000
LIFO Inventory Amount	749,500,000	749,400,000
Current costs or first-in, first-out (FIFO) excess of replacement over stated LIFO value	$ 108,600,000	$ 110,900,000