CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current Assets:
Cash and cash equivalents	$ 98,636	$ 96,938
Trade accounts receivable, net of allowances of $9,637 and $7,221	114,749	114,916
Inventories, net	195,457	171,806
Deferred tax assets	38,120	39,100
Prepaid expenses and other current assets	30,774	30,291
Total current assets	477,736	453,051
Property, plant and equipment, net	184,537	177,898
Intangible assets, net	206,884	212,267
Goodwill	292,881	294,067
Deferred tax assets	14,988	15,957
Other assets	10,475	10,359
Total assets	1,187,501	1,163,599
Current Liabilities:
Accounts payable, trade	44,767	36,742
Deferred revenue	3,748	3,505
Accrued compensation	27,822	34,914
Accrued expenses and other current liabilities	33,002	31,768
Total current liabilities	109,339	106,929
Long-term borrowings under senior credit facility	341,875	321,875
Long-term convertible securities	201,375	197,672
Deferred tax liabilities	5,396	5,393
Other liabilities	12,927	13,955
Total liabilities	670,912	645,824
Commitments and contingencies
Stockholders’ Equity:
Preferred Stock; no par value; 15,000 authorized shares; none outstanding
Common stock; $0.01 par value; 60,000 authorized shares; 36,969 and 36,852 issued at June 30, 2013 and December 31, 2012, respectively	370	369
Additional paid-in capital	591,331	587,301
Treasury stock, at cost; 8,903 shares at June 30, 2013 and December 31, 2012	(367,121)	(367,121)
Accumulated other comprehensive (loss)	(9,404)	(4,797)
Retained earnings	301,413	302,023
Total stockholders’ equity	516,589	517,775
Total liabilities and stockholders’ equity	$ 1,187,501	$ 1,163,599