CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
CURRENT ASSETS:
Cash and cash equivalents	$ 32,336	$ 19,171
Trade receivables — net of allowance for uncollectible accounts — 2017 — $1,769 and 2016 — $1,587	105,536	80,521
Other receivables	9,429	5,643
Inventories	155,288	120,695
Prepaid expenses and other assets	9,096	6,226
Prepaid income taxes	3,225	2,525
Deferred income tax assets	0	8,219
Income tax refund receivables	1,211	423
Total current assets	316,121	243,423
PROPERTY AND EQUIPMENT:
Land and land improvements	19,877	19,379
Buildings	147,356	139,119
Manufacturing equipment	197,651	178,110
Furniture and fixtures	49,528	43,433
Leasehold improvements	31,161	30,413
Construction-in-progress	32,896	28,180
Total property and equipment	478,469	438,634
Less accumulated depreciation	(185,649)	(162,061)
Property and equipment — net	292,820	276,573
OTHER ASSETS:
Goodwill	238,147	211,927
Deferred income tax assets	2,359	171
Other assets	35,040	28,012
Total other assets	502,870	422,807
TOTAL	1,111,811	942,803
CURRENT LIABILITIES:
Trade payables	34,931	30,619
Accrued expenses	58,932	45,519
Current portion of long-term debt	19,459	10,000
Income taxes payable	2,298	2,193
Total current liabilities	115,620	88,331
LONG-TERM DEBT	259,013	314,373
DEFERRED INCOME TAX LIABILITIES	23,289	25,981
LONG-TERM INCOME TAXES PAYABLE	4,846	0
LIABILITIES RELATED TO UNRECOGNIZED TAX BENEFITS	2,746	438
DEFERRED COMPENSATION PAYABLE	11,181	9,211
DEFERRED CREDITS	2,403	2,550
OTHER LONG-TERM OBLIGATIONS	16,379	3,730
Total liabilities	435,477	444,614
COMMITMENTS AND CONTINGENCIES (Notes 2, 7, 8, and 9)
STOCKHOLDERS’ EQUITY:
Preferred stock — 5,000 shares authorized as of December 31, 2017 and 2016; no shares issued	0	0
Common stock, no par value; shares authorized — 2017 and 2016 - 100,000; issued and outstanding as of December 31, 2017 - 50,248 and December 31, 2016 - 44,645	353,392	206,186
Retained earnings	321,408	293,885
Accumulated other comprehensive income (loss)	1,534	(1,882)
Total stockholders’ equity	676,334	498,189
TOTAL	1,111,811	942,803
Developed technology — net of accumulated amortization — 2017 — $72,420 and 2016 — $52,843
OTHER ASSETS:
Intangible assets	167,771	135,358
Other — net of accumulated amortization — 2017 — $38,127 and 2016 — $30,048
OTHER ASSETS:
Intangible assets	$ 59,553	$ 47,339