Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 418,016	$ 644,345
Short-term investments	44,326	73,826
Trade accounts receivable, net of allowance for doubtful accounts of $4,968 and $5,243 at March 31, 2019 and December 31, 2018, respectively	335,990	295,454
Inventories	475,633	384,689
Other current assets	86,387	65,790
Total current assets	1,360,352	1,464,104
Property, plant and equipment, net	251,424	194,367
Right-of-use asset	65,628
Goodwill	1,057,331	586,996
Intangible assets, net	619,091	319,807
Long-term investments	10,350	10,290
Other assets	48,562	38,682
Total assets	3,412,738	2,614,246
Current liabilities:
Short-term debt	10,281	3,986
Accounts payable	95,317	83,825
Accrued compensation	61,523	82,350
Income taxes payable	14,355	16,358
Lease liability	19,459
Deferred revenue and customer advances	21,056	14,246
Other current liabilities	74,568	62,520
Total current liabilities	296,559	263,285
Long-term debt, net	976,823	343,842
Non-current deferred taxes	78,904	48,223
Non-current accrued compensation	60,337	55,598
Non-current lease liability	49,392
Other liabilities	29,862	30,111
Total liabilities	1,491,877	741,059
Commitments and contingencies (Note 19)
Stockholders' equity:
Preferred Stock, $0.01 par value per share, 2,000,000 shares authorized; none issued and outstanding
Common Stock, no par value, 200,000,000 shares authorized; 54,231,772 and 54,039,554 shares issued and outstanding at March 31, 2019 and December 31, 2018, respectively	113	113
Additional paid-in capital	844,261	793,932
Retained earnings	1,086,409	1,084,797
Accumulated other comprehensive loss	(9,922)	(5,655)
Total stockholders' equity	1,920,861	1,873,187
Total liabilities and stockholders' equity	$ 3,412,738	$ 2,614,246

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682