CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 277,303	$ 297,795
Accounts receivable, net	391,331	353,561
Inventories	457,007	472,237
Prepaid expenses and other current assets	97,568	104,646
Total current assets	1,223,209	1,228,239
Property and equipment, net	269,269	267,682
Deferred income taxes, net	35,610	36,210
Goodwill	1,386,847	1,394,364
Intangible assets, net	197,632	209,636
Other assets	116,235	116,217
Total assets	3,228,802	3,252,348
Current liabilities:
Accounts payable	150,541	157,592
Deferred revenue	28,568	25,862
Accrued payroll and related liabilities	77,330	98,911
Accrued product warranties	18,397	17,019
Advance payments from customers	13,730	10,940
Accrued expenses	34,617	41,347
Accrued income taxes	27,852	28,941
Other current liabilities	44,708	44,053
Long-term debt, current portion	12,945	13,473
Total current liabilities	408,688	438,138
Long-term debt, net of current portion	712,866	724,919
Deferred income taxes	43,159	43,708
Accrued income taxes	60,699	60,248
Other long-term liabilities	93,516	101,961
Shareholders’ equity:
Preferred stock, $0.01 par value, 10,000 shares authorized; no shares issued at March 31, 2021, and December 31, 2020	0	0
Common stock, $0.01 par value, 500,000 shares authorized; 131,575 and 131,360 shares issued, 131,368 and 131,153 shares outstanding at March 31, 2021, and December 31, 2020, respectively, and additional paid-in capital	42,101	31,767
Retained earnings	2,033,585	2,017,097
Treasury Stock, Carrying Basis	(7,504)	(7,504)
Accumulated other comprehensive loss	(158,308)	(157,986)
Total shareholders’ equity	1,909,874	1,883,374
Total liabilities and shareholders' equity	$ 3,228,802	$ 3,252,348