Inventory	12 Months Ended
Dec. 31, 2016
Inventory Disclosure [Abstract]
Inventory	INVENTORY Our inventory is stated at the lower of cost (determined using the LIFO cost method) or market. Inventories valued using the LIFO method comprised 90% and 93% of the total inventories at December 31, 2016 and 2015, respectively. Had the first-in, first-out (“FIFO”) method been used, merchandise inventory would have been $147,091 and $136,143 greater than reported under the LIFO method at December 31, 2016 and 2015, respectively. In 2016, we liquidated portions of previously-created LIFO layers, resulting in decreases in cost of merchandise sold of $131. We did not liquidate any portion of previously-created LIFO layers in 2015 and 2014. Reserves for excess and obsolete inventories were $6,553 and $4,912 at December 31, 2016 and 2015, respectively. The change in the reserve for excess and obsolete inventories, included in cost of merchandise sold, was $1,641, $495, and $670 for the years ended December 31, 2016, 2015, and 2014, respectively.

Inventory

12 Months Ended

Dec. 31, 2016

INVENTORY

Our inventory is stated at the lower of cost (determined using the LIFO cost method) or market. Inventories valued using the LIFO method comprised 90% and 93% of the total inventories at December 31, 2016 and 2015, respectively. Had the first-in, first-out (“FIFO”) method been used, merchandise inventory would have been $147,091 and $136,143 greater than reported under the LIFO method at December 31, 2016 and 2015, respectively. In 2016, we liquidated portions of previously-created LIFO layers, resulting in decreases in cost of merchandise sold of $131. We did not liquidate any portion of previously-created LIFO layers in 2015 and 2014.

Reserves for excess and obsolete inventories were $6,553 and $4,912 at December 31, 2016 and 2015, respectively. The change in the reserve for excess and obsolete inventories, included in cost of merchandise sold, was $1,641, $495, and $670 for the years ended December 31, 2016, 2015, and 2014, respectively.