CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current Assets:
Cash and cash equivalents	$ 89,691	$ 96,938
Trade accounts receivable, net of allowances of $10,528 and $7,221	111,944	114,916
Inventories, net	179,558	171,806
Deferred tax assets	38,470	39,100
Prepaid expenses and other current assets	27,396	30,291
Total current assets	447,059	453,051
Property, plant and equipment, net	179,352	177,898
Intangible assets, net	212,274	212,267
Goodwill	292,278	294,067
Deferred tax assets	15,743	15,957
Other assets	9,785	10,359
Total assets	1,156,491	1,163,599
Current Liabilities:
Accounts payable, trade	43,875	36,742
Deferred revenue	3,868	3,505
Accrued compensation	23,484	34,914
Accrued expenses and other current liabilities	34,553	31,768
Total current liabilities	105,780	106,929
Long-term borrowings under senior credit facility	321,875	321,875
Long-term convertible securities	199,511	197,672
Deferred tax liabilities	5,397	5,393
Other liabilities	14,039	13,955
Total liabilities	646,602	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; 36,959 and 36,852 issued at March 31, 2013 and December 31, 2012, respectively	370	369
Additional paid-in capital	589,948	587,301
Treasury stock, at cost; 8,903 shares at March 31, 2013 and December 31, 2012	(367,121)	(367,121)
Accumulated other comprehensive (loss)	(11,281)	(4,797)
Retained earnings	297,973	302,023
Total stockholders’ equity	509,889	517,775
Total liabilities and stockholders’ equity	$ 1,156,491	$ 1,163,599