CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current Assets:
Cash and cash equivalents	$ 114,362	$ 144,454
Accounts receivable, net	412,898	368,348
Inventories	332,565	269,030
Other current assets	183,000	173,823
Total current assets	1,042,825	955,655
Long-Term Assets:
Property and equipment, net	594,224	587,667
Operating lease right-of-use assets	115,461	105,101
Goodwill	355,528	359,345
Intangible assets, net	100,594	99,035
Other long-term assets	398,553	330,400
Total long-term assets	1,564,360	1,481,548
TOTAL ASSETS	2,607,185	2,437,203
Current Liabilities:
Accounts payable	127,262	116,140
Accrued liabilities	387,510	458,909
Line of credit	611,000	73,500
Current portion of long-term debt	0	74,996
Current portion of deferred revenue	40,775	40,034
Total current liabilities	1,166,547	763,579
Long-Term Liabilities:
Deferred income tax liabilities	10,852	8,935
Long-term debt, net of current portion	767,995	775,205
Long-term deferred revenue, net of current portion	36,965	41,174
Long-term operating lease liabilities	98,041	87,377
Other long-term liabilities	69,777	70,941
Total long-term liabilities	983,630	983,632
Total liabilities	2,150,177	1,747,211
Commitments and Contingencies (Note 16)
Stockholders’ Equity:
Common stock, $0.10 par value: Authorized: 120,000 shares; Issued: 107,075 shares in 2022 and 106,878 shares in 2021; Outstanding: 83,428 shares in 2022 and 84,562 shares in 2021	10,707	10,688
Additional paid-in capital	1,419,709	1,377,320
Deferred stock units: Outstanding: 58 units in 2022 and 90 units in 2021	5,170	5,719
Retained earnings	3,246,384	2,920,440
Accumulated other comprehensive loss	(67,705)	(53,484)
Treasury stock, at cost: 23,647 shares in 2022 and 22,317 shares in 2021	(4,157,257)	(3,570,691)
Total stockholders’ equity	457,008	689,992
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 2,607,185	$ 2,437,203