CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current Assets:
Cash and cash equivalents	$ 129,038	$ 120,614
Trade accounts receivable, net of allowances of $6,287 and $6,194	112,521	118,145
Inventories, net	215,232	206,919
Deferred tax assets	48,459	48,616
Prepaid expenses and other current assets	34,496	26,858
Total current assets	539,746	521,152
Property, plant and equipment, net	205,667	200,310
Intangible assets, net	429,446	197,163
Goodwill	367,649	249,764
Deferred tax assets	5,645	15,412
Other assets	7,770	8,338
Total assets	1,555,923	1,192,139
Current Liabilities:
Accounts payable, trade	46,428	50,752
Deferred revenue	4,220	4,197
Accrued compensation	28,487	28,079
Accrued expenses and other current liabilities	37,696	36,354
Total current liabilities	116,831	119,382
Long-term borrowings under senior credit facility	421,875	186,875
Long-term convertible securities	207,125	205,182
Deferred tax liabilities	94,612	2,083
Other liabilities	36,280	12,527
Total liabilities	876,723	526,049
Commitments and contingencies
Stockholders’ Equity:
Preferred Stock; no par value; 15,000 authorized shares; none outstanding	0	0
Common stock; $0.01 par value; 60,000 authorized shares; 41,449 and 41,042 issued at March 31, 2014 and December 31, 2013, respectively	415	410
Additional paid-in capital	760,817	750,918
Treasury stock, at cost; 8,903 shares at March 31, 2014 and December 31, 2013	(367,121)	(367,121)
Accumulated other comprehensive income (loss)	1,927	927
Retained earnings	283,162	280,956
Total stockholders’ equity	679,200	666,090
Total liabilities and stockholders’ equity	$ 1,555,923	$ 1,192,139