CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current Assets:
Cash and cash equivalents	$ 75,470	$ 100,808
Short-term investments	39,315
Trade accounts receivable, net of allowances of $7,013 and $6,978	115,571	118,129
Inventories, net	172,541	171,261
Deferred tax assets	62,264	36,155
Prepaid expenses and other current assets	12,162	25,904
Total current assets	477,323	452,257
Property, plant and equipment, net	146,928	131,383
Intangible assets, net	224,308	237,122
Goodwill	292,085	292,980
Deferred tax assets	8,657	21,477
Other assets	12,516	13,128
Total assets	1,161,817	1,148,347
Current Liabilities:
Accounts payable, trade	43,190	27,656
Deferred revenue	4,261	4,543
Accrued compensation	28,664	28,010
Accrued expenses and other current liabilities	36,132	41,659
Total current liabilities	112,247	101,868
Long-term borrowings under senior credit facility	321,875	179,688
Long-term convertible securities	194,072	352,576
Deferred tax liabilities	9,324	5,726
Other liabilities	17,087	15,851
Total liabilities	654,605	655,709
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 35,902 and 35,734 issued at June 30, 2012 and December 31, 2011, respectively	359	357
Additional paid-in capital	611,337	607,676
Treasury stock, at cost; 8,903 shares at June 30, 2012 and December 31, 2011	(367,121)	(367,121)
Accumulated other comprehensive (loss):	(13,389)	(9,093)
Retained earnings	276,026	260,819
Total stockholders' equity	507,212	492,638
Total liabilities and stockholders' equity	$ 1,161,817	$ 1,148,347