CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 86,803	$ 48,132
Restricted cash and cash equivalents	0	4,073
Trade accounts receivable, net of allowances of $6,023 and $5,572	145,571	132,241
Inventories, net	220,442	211,429
Prepaid expenses and other current assets	41,170	42,620
Total current assets	493,986	438,495
Property, plant and equipment, net	208,648	205,181
Intangible assets, net	583,569	603,740
Goodwill	514,023	512,389
Deferred tax assets	7,062	6,932
Other assets	6,874	7,487
Total assets	1,814,162	1,774,224
Current liabilities:
Borrowings under senior credit facility	21,250	14,375
Accounts payable, trade	43,954	34,772
Deferred revenue	8,151	5,666
Accrued compensation	38,435	45,154
Accrued expenses and other current liabilities	38,037	39,160
Total current liabilities	149,827	139,127
Long-term borrowings under senior credit facility	461,250	481,875
Long-term convertible securities	223,041	218,240
Deferred tax liabilities	156,337	154,891
Other liabilities	28,920	28,648
Total liabilities	1,019,375	1,022,781
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; 46,238 and 45,857 issued at June 30, 2016 and December 31, 2015, respectively	462	459
Additional paid-in capital	1,032,970	1,020,128
Treasury stock, at cost; 8,915 shares at June 30, 2016 and December 31, 2015	(367,121)	(367,121)
Accumulated other comprehensive loss	(43,576)	(47,902)
Retained earnings	172,052	145,879
Total stockholders’ equity	794,787	751,443
Total liabilities and stockholders’ equity	$ 1,814,162	$ 1,774,224