Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 771	$ 4,347
Accounts receivable, net	83,081	69,159
Inventories	97,614	90,039
Prepaid expenses and other current assets	5,751	5,655
Deferred income taxes	3,839	3,839
Total current assets	191,056	173,039
Property, plant and equipment, net	104,080	96,218
Goodwill	179,592	179,314
Intangible assets, net	63,172	64,334
Other assets	14,114	15,059
Total assets	552,014	527,964
Current liabilities:
Accounts payable	31,621	30,471
Accrued expenses	25,847	23,703
Current installments of long-term debt and capital lease obligations	6,093	5,632
Total current liabilities	63,561	59,806
Long-term liabilities:
Long-term debt and capital lease obligations, less current installments	272,629	255,067
Other long-term liabilities	3,347	3,405
Deferred income taxes	8,732	8,732
Total long-term liabilities	284,708	267,204
Shareholders' equity:
Common stock, $0.02 par value per share; authorized 28,000,000 shares; issued 12,860,023 shares at March 31, 2013 and December 31, 2012	257	257
Preferred stock, $0.02 par value per share; authorized 2,000,000 shares; none issued at either date	0	0
Additional paid-in capital	91,646	90,839
Accumulated other comprehensive loss	(331)	(49)
Treasury stock, at cost, 11,168 shares at March 31, 2013 and 101,622 shares at December 31, 2012	(53)	(482)
Retained earnings	112,226	110,389
Total shareholders' equity	203,745	200,954
Total liabilities and shareholders' equity	$ 552,014	$ 527,964