CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 31,751	$ 28,802
Accounts receivable, less allowance for doubtful accounts of $16,677 in 2018 and $17,102 in 2017	640,134	619,200
Inventories	742,886	821,683
Other current assets	63,903	43,044
Total current assets	1,478,674	1,512,729
Property, plant and equipment, net	129,927	132,793
Intangible assets, net	68,547	73,441
Goodwill	13,065	13,153
Other long-term assets	73,061	42,134
Total assets	1,763,274	1,774,250
Current liabilities:
Accounts payable	526,263	500,883
Accrued liabilities	195,342	189,916
Current maturities of long-term debt	6,072	6,079
Total current liabilities	727,677	696,878
Deferred income taxes	1,175	1,192
Long-term debt	518,660	492,044
Other long-term liabilities	76,525	89,222
Total liabilities	1,324,037	1,279,336
Stockholders’ equity:
Common stock, $0.10 par value; authorized - 100,000,000 shares, issued - 74,435,628 shares in 2018 and 2017	7,444	7,444
Additional paid-in capital	415,449	412,987
Treasury stock, at cost – 36,725,594 shares in 2018 and 36,811,366 shares in 2017	(1,091,993)	(1,093,813)
Retained earnings	1,156,910	1,219,309
Accumulated other comprehensive loss	(48,573)	(51,013)
Total stockholders’ equity	439,237	494,914
Total liabilities and stockholders’ equity	$ 1,763,274	$ 1,774,250