CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income	$ 63,073	$ 28,131
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	16,692	16,104
Loss on disposal of assets	359	84
Deferred income taxes	(519)	2,237
Stock-based compensation	3,374	2,363
Accretion of deferred financing fees	155	141
Changes in assets and liabilities, net of business acquisitions:
Accounts and other receivables	(28,402)	(13,170)
Inventories	(1,889)	38,986
Accounts payable	(8,029)	(13,781)
Income taxes payable	17,933	0
Accrued liabilities	(11,718)	912
Deferred income and customer advances	(315)	(6,803)
Other assets and liabilities	(1,552)	1,886
Net cash provided by operating activities	49,162	57,090
Cash flows from investing activities:
Expenditures for property, plant and equipment	(21,019)	(14,177)
Acquisition of business	(98,589)	(9,523)
Other investing activities	(296)	(231)
Net cash used for investing activities	(119,904)	(23,931)
Cash flows from financing activities:
Borrowings from line of credit	148,500	54,000
Payments of line of credit	(63,500)	(83,000)
Principal payments of finance leases	(237)	(199)
Dividend payments	(3,517)	0
Purchase of treasury stock	(7,012)	(443)
Issuance of common stock	714	1
Net cash provided by (used for) financing activities	74,948	(29,641)
Net change in cash and cash equivalents	4,206	3,518
Cash and cash equivalents at beginning of period	15,100	10,606
Cash and cash equivalents at the end of period	19,306	14,124
Supplemental non-cash investing activities:
Capital expenditures included in accounts payable	7,335	2,965
Supplemental cash activities:
Cash paid for interest	408	1,518
Cash paid for income taxes	$ 22	$ 35