Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011
Current assets:
Cash and cash equivalents	$ 28,818	$ 17,487	$ 20,656
Receivables, net	175,459	110,555	160,647
Product inventories, net	349,325	386,924	337,698
Prepaid expenses and other current assets	8,078	11,298	7,354
Deferred income taxes	11,561	11,737	10,145
Total current assets	573,241	538,001	536,500
Property and equipment, net	46,643	41,394	40,774
Goodwill	169,983	177,103	178,516
Other intangible assets, net	11,270	11,738	11,953
Equity interest investments	1,066	980	976
Other assets, net	29,180	29,406	29,493
Total assets	831,383	798,622	798,212
Current liabilities:
Accounts payable	163,543	177,437	120,221
Accrued expenses and other current liabilities	102,805	53,398	70,718
Current portion of long-term debt and other long-term liabilities	23	22	22
Total current liabilities	266,371	230,857	190,961
Deferred income taxes	31,833	32,993	26,549
Long-term debt	214,328	247,300	268,700
Other long-term liabilities	6,381	7,726	7,503
Total liabilities	518,913	518,876	493,713
Stockholders' equity:
Common stock	47	47	48
Additional paid-in capital	265,129	243,180	236,623
Retained earnings	47,510	34,299	64,805
Accumulated other comprehensive income (loss)	(216)	2,220	3,023
Total stockholders' equity	312,470	279,746	304,499
Total liabilities and stockholders' equity	$ 831,383	$ 798,622	$ 798,212