Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 603,807	$ 505,631
Investments	2,651,150	2,307,401
Accounts receivable, less allowances for doubtful accounts and sales returns of $9,379 and $8,657 at September 30, 2017 and December 31, 2016, respectively	456,334	489,340
Inventories	297,854	262,682
Other current assets	69,380	70,391
Total current assets	4,078,525	3,635,445
Property, plant and equipment, net	342,832	337,118
Intangible assets, net	224,056	207,055
Goodwill	359,376	352,080
Other assets	158,196	130,361
Total assets	5,162,985	4,662,059
Current liabilities:
Notes payable and debt	225,423	125,297
Accounts payable	66,754	67,740
Accrued employee compensation	42,021	57,465
Deferred revenue and customer advances	185,524	148,837
Accrued income taxes	24,355	15,244
Accrued warranty	12,855	13,391
Other current liabilities	105,217	92,347
Total current liabilities	662,149	520,321
Long-term liabilities:
Long-term debt	1,732,367	1,701,966
Long-term portion of retirement benefits	69,666	72,568
Long-term income tax liabilities	7,656	10,458
Other long-term liabilities	62,052	54,797
Total long-term liabilities	1,871,741	1,839,789
Total liabilities	2,533,890	2,360,110
Commitments and contingencies (Notes 5, 6, 7 and 11)
Stockholders' equity:
Preferred stock, par value $0.01 per share, 5,000 shares authorized, none issued at September 30, 2017 and December 31, 2016	0	0
Common stock, par value $0.01 per share, 400,000 shares authorized, 159,589 and 158,634 shares issued, 79,522 and 80,023 shares outstanding at September 30, 2017 and December 31, 2016, respectively	1,596	1,586
Additional paid-in capital	1,710,783	1,607,241
Retained earnings	5,758,552	5,385,069
Treasury stock, at cost, 80,067 and 78,611 shares at September 30, 2017 and December 31, 2016, respectively	(4,721,409)	(4,475,667)
Accumulated other comprehensive loss	(120,427)	(216,280)
Total stockholders' equity	2,629,095	2,301,949
Total liabilities and stockholders' equity	$ 5,162,985	$ 4,662,059

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).

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Balance Type:	credit
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- 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.