CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income	$ 639,640	$ 172,580
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	111,946	134,331
Deferred income taxes	(7,398)	(8,857)
Stock-based compensation expense	8,841	10,402
Other non-cash adjustments	2,037	2,874
Changes in assets and liabilities, net of assets acquired and liabilities assumed:
Receivables	(549,712)	(294,129)
Inventories	(561,813)	(340,940)
Contract assets	(33,081)	(89,994)
Other current assets	(27,860)	(27,664)
Other assets and liabilities	407	1,999
Accounts payable	470,198	241,621
Accrued liabilities	93,237	2,039
Contract liabilities	33,380	(4,770)
Net cash provided by (used in) operating activities	179,822	(200,508)
Cash flows from investing activities:
Cash acquired in BMC Merger		167,490
Purchases of property, plant and equipment	(50,475)	(39,263)
Proceeds from sale of property, plant and equipment	2,140	3,194
Net cash (used in) provided by investing activities	(48,335)	131,421
Cash flows from financing activities:
Borrowings under revolving credit facility	1,906,000	410,000
Repayments under revolving credit facility	(1,738,000)	(260,000)
Proceeds from long-term debt and other loans	301,500
Repayments of long-term debt and other loans	(827)	(468,671)
Payments of debt extinguishment costs		(2,475)
Payments of loan costs	(6,416)	(4,272)
Exercise of stock options	420	235
Repurchase of common stock	(354,965)	(10,418)
Net cash provided by (used in) financing activities	107,712	(335,601)
Net change in cash and cash equivalents	239,199	(404,688)
Cash and cash equivalents at beginning of period	42,603	423,806
Cash and cash equivalents at end of period	281,802	19,118
Supplemental disclosures of cash flow information:
Cash paid for interest	52,528	21,922
Cash paid for income taxes	202	21,701
Supplemental disclosures of non-cash activities:
Non-cash consideration for the BMC Merger		3,658,362
Accrued purchases of property, plant and equipment	6,024	6,734
Right-of-use assets obtained in exchange for operating lease obligations	14,918	13,707
Assets acquired under finance lease obligations		$ 1,644
Amounts accrued for repurchases of common stock	$ 11,917