Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 49,126	$ 110,247
Trade accounts receivable, net of allowances of $12,474 and $25,086 as of June 30, 2013 and December 31, 2012, respectively	109,877	190,756
Inventories	362,060	300,173
Prepaid expenses	13,058	14,092
Other current assets	55,376	59,028
Income taxes receivable	22,899
Deferred tax assets	16,685	17,290
Total current assets	629,081	691,586
Property and equipment, net of accumulated depreciation of $82,210 and $69,580 as of June 30, 2013 and December 31, 2012, respectively	142,135	125,370
Goodwill	128,725	128,725
Other intangible assets, net of accumulated amortization of $19,936 and $16,164 as of June 30, 2013 and December 31, 2012, respectively	93,040	95,965
Deferred tax assets	13,521	13,372
Other assets	15,613	13,046
Total assets	1,022,115	1,068,064
Current liabilities:
Short-term borrowings	26,000	33,000
Trade accounts payable	169,220	133,457
Accrued payroll	22,342	15,896
Other accrued expenses	38,710	59,597
Income taxes payable	1,684	25,067
Total current liabilities	257,956	267,017
Long-term liabilities	45,927	62,246
Commitments and contingencies (note 9)
Stockholders' equity:
Common stock, $0.01 par value; authorized 125,000 shares; issued and outstanding 34,493 and 34,400 shares as of June 30, 2013 and December 31, 2012, respectively	344	344
Additional paid-in capital	147,188	139,046
Retained earnings	572,543	600,811
Accumulated other comprehensive loss	(1,843)	(1,400)
Total stockholders' equity	718,232	738,801
Total liabilities and equity	$ 1,022,115	$ 1,068,064