CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net income	$ 1,626,850	$ 669,815
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	229,805	261,553
Deferred income taxes	(22,627)	(32,753)
Stock-based compensation expense	18,156	18,867
Other non-cash adjustments	8,614	3,534
Changes in assets and liabilities, net of assets acquired and liabilities assumed:
Receivables	(637,115)	(753,320)
Inventories	(419,560)	(840,283)
Contract assets	(63,127)	(113,823)
Other current assets	(6,790)	(53,672)
Other assets and liabilities	23,707	10,201
Accounts payable	168,144	448,527
Accrued liabilities	160,794	154,334
Contract liabilities	40,219	(23,244)
Net cash provided by (used in) operating activities	1,127,070	(203,776)
Cash flows from investing activities:
Cash acquired in BCM merger		167,490
Prepayments for acquisitions		(225,000)
Cash used for acquisitions	(192,945)	(24,833)
Purchases of property, plant and equipment	(119,538)	(98,293)
Proceeds from sale of property, plant and equipment	5,395	9,321
Net cash used in investing activities	(307,088)	(171,315)
Cash flows from financing activities:
Borrowings under revolving credit facility	3,599,000	1,769,000
Repayments under revolving credit facility	(3,353,000)	(1,233,000)
Proceeds from long-term debt and other loans	1,001,500
Repayments of long-term debt and other loans	(614,146)	(470,330)
Payments of debt extinguishment costs	(20,672)	(2,475)
Payments of loan costs	(15,816)	(4,272)
Exercise of stock options	434	335
Repurchase of common stock	(1,293,700)	(17,707)
Net cash (used in) provided by financing activities	(696,400)	41,551
Net change in cash and cash equivalents	123,582	(333,540)
Cash and cash equivalents at beginning of period	42,603	423,806
Cash and cash equivalents at end of period	166,185	90,266
Supplemental disclosures of cash flow information:
Cash paid for interest	85,646	53,600
Cash paid for income taxes	430,789	191,070
Supplemental disclosures of non-cash activities:
Non-cash or accrued consideration for acquisitions	7,371	3,658,362
Accrued purchases of property, plant and equipment	10,392	9,616
Right-of-use assets obtained in exchange for operating lease obligations	67,039	29,146
Assets acquired under finance lease obligations		$ 1,644
Amounts accrued for repurchases of common stock	$ 69,412