CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current assets:
Cash	$ 9,923	$ 5,469
Trade accounts receivable, net of allowance for doubtful accounts of $11,063 in 2014 and $8,798 in 2013	269,537	193,341
Inventories, net	117,051	105,271
Prepaid expenses and other current assets	4,904	2,693
Deferred income taxes	8,428	7,713
Total current assets	409,843	314,487
Property and equipment, net	71,027	58,253
Goodwill	373,719	188,110
Other intangible assets, net of accumulated amortization of $58,075 in 2014 and $44,410 in 2013	139,954	69,722
Other long-term assets	4,752	6,043
Total assets	999,295	636,615
Current liabilities:
Current maturities of long-term debt	38,816	26,213
Trade accounts payable	104,947	78,853
Accrued wages and benefits	30,784	20,473
Federal income taxes payable	1,710	853
Customer advances	3,813	3,720
Other current liabilities	29,851	19,943
Total current liabilities	209,921	150,055
Long-term debt, less current maturities	410,796	168,372
Non-current deferred income taxes	40,004	21,938
Commitments and Contingencies (Note 13)
Shareholders' equity:
Common stock, $0.01 par value, 100,000,000 shares authorized; 14,453,954 in 2014 and 14,468,485 in 2013 shares issued	146	144
Additional paid-in capital	115,080	109,892
Retained earnings	238,469	193,737
Accumulated other comprehensive income	(4,175)	(2,368)
Treasury stock, at cost (206,845 shares in 2014 and 146,871 in 2013)	(10,962)	(5,171)
Total shareholders' equity	338,574	296,250
Total liabilities and stockholders' equity	999,295	636,615
Series A Preferred Stock [Member]
Shareholders' equity:
Preferred stock	1	1
Series B Convertible Preferred Stock [Member]
Shareholders' equity:
Preferred stock	$ 15	$ 15