Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 84,107	$ 110,247
Trade accounts receivable, net of allowances of $16,740 and $25,086 as of September 30, 2013 and December 31, 2012, respectively	211,981	190,756
Inventories	444,595	300,173
Prepaid expenses	15,692	14,092
Other current assets	71,321	59,028
Income taxes receivable	14,194	0
Deferred tax assets	17,756	17,290
Total current assets	859,646	691,586
Property and equipment, net of accumulated depreciation of $88,354 and $69,580 as of September 30, 2013 and December 31, 2012, respectively	164,412	125,370
Goodwill	128,725	128,725
Other intangible assets, net of accumulated amortization of $22,040 and $16,164 as of September 30, 2013 and December 31, 2012, respectively	90,986	95,965
Deferred tax assets	13,523	13,372
Other assets	18,646	13,046
Total assets	1,275,938	1,068,064
Current liabilities:
Short-term borrowings	245,458	33,000
Trade accounts payable	144,306	133,457
Accrued payroll	27,012	15,896
Other accrued expenses	52,652	59,597
Income taxes payable	2,762	25,067
Total current liabilities	472,190	267,017
Long-term liabilities	47,919	62,246
Commitments and contingencies (note 9)
Stockholders' equity:
Common stock, $0.01 par value; authorized 125,000 shares; issued and outstanding 34,537 and 34,400 shares as of September 30, 2013 and December 31, 2012, respectively	345	344
Additional paid-in capital	150,598	139,046
Retained earnings	605,603	600,811
Accumulated other comprehensive loss	(717)	(1,400)
Total stockholders' equity	755,829	738,801
Total liabilities and equity	$ 1,275,938	$ 1,068,064