Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Current assets:
Cash and cash equivalents	$ 24,222	$ 12,463	$ 28,818
Receivables, net	180,898	113,859	174,385
Product inventories, net	365,596	400,308	349,325
Prepaid expenses and other current assets	9,474	11,280	8,078
Deferred income taxes	3,742	5,186	6,946
Total current assets	583,932	543,096	567,552
Property and equipment, net	51,537	46,566	46,643
Goodwill	169,983	169,983	169,983
Other intangible assets, net	10,390	11,053	11,270
Equity interest investments	1,112	1,160	1,066
Other assets, net	9,920	8,718	8,207
Total assets	826,874	780,576	804,721
Current liabilities:
Accounts payable	142,777	199,787	163,543
Accrued expenses and other current liabilities	64,737	48,186	98,755
Current portion of long-term debt and other long-term liabilities	15	23	23
Total current liabilities	207,529	247,996	262,321
Deferred income taxes	15,463	13,453	9,221
Long-term debt	260,432	230,882	214,328
Other long-term liabilities	7,619	6,622	6,381
Total liabilities	491,043	498,953	492,251
Stockholders' equity:
Common stock	46	46	47
Additional paid-in capital	305,831	276,334	265,129
Retained (deficit) earnings	29,536	5,377	47,510
Accumulated other comprehensive income (loss)	418	(134)	(216)
Total stockholders' equity	335,831	281,623	312,470
Total liabilities and stockholders' equity	$ 826,874	$ 780,576	$ 804,721