CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current Assets:
Cash and cash equivalents	$ 96,938	$ 100,808
Trade accounts receivable, net of allowances of $7,221 and $6,978	114,916	118,129
Inventories, net	171,806	171,261
Deferred tax assets	39,100	36,155
Prepaid expenses and other current assets	30,291	25,904
Total current assets	453,051	452,257
Property, plant and equipment, net	177,898	131,383
Intangible assets, net	212,267	237,122
Goodwill	294,067	292,980
Deferred tax assets	15,957	17,239
Other assets	10,359	13,128
Total assets	1,163,599	1,144,109
Current Liabilities:
Accounts payable, trade	36,742	27,656
Deferred revenue	3,505	4,543
Accrued compensation	34,914	28,010
Accrued expenses and other current liabilities	31,768	41,659
Total current liabilities	106,929	101,868
Long-term borrowings under senior credit facility	321,875	179,688
Long-term convertible securities	197,672	352,576
Deferred tax liabilities	5,393	5,726
Other liabilities	13,955	11,613
Total liabilities	645,824	651,471
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; 36,852 and 35,734 issued at December 31, 2012 and 2011, respectively	369	357
Additional paid-in capital	587,301	607,676
Treasury stock, at cost; 8,903 shares at December 31, 2012 and 2011, respectively	(367,121)	(367,121)
Accumulated other comprehensive income (loss):
Foreign currency translation adjustment	(1,270)	(6,494)
Pension liability adjustment, net of tax	(1,154)	(131)
Unrealized (loss) gain on derivatives, net of tax	(2,373)	(2,468)
Retained earnings	302,023	260,819
Total stockholders' equity	517,775	492,638
Total liabilities and stockholders' equity	$ 1,163,599	$ 1,144,109