UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 64,431	$ (25,915)
Adjustments to reconcile net income (loss) to net cash provided by operations:
Depreciation and amortization expense	52,820	60,054
Non-cash operating lease costs	11,137	13,020
Paid-in-kind interest capitalized as principal	0	7,525
Deferred income taxes - net	1,180	897
Loss on extinguishment of debt	12,403	8,349
Amortization of deferred financing costs	3,821	4,153
Loss on interest rate swaps upon discontinuing hedge accounting	0	3,746
Equity in earnings of joint ventures	(4,567)	(2,364)
Stock-based incentive compensation expense	6,246	2,588
Other adjustments	2,622	1,589
Changes in operating assets and liabilities:
Accounts receivable, net	(27,310)	3,496
Inventories	(31,472)	(39,602)
Prepaid expenses and other current assets	5,958	(8,724)
Accounts payable	35,648	66,508
Accrued compensation and employee benefits	5,777	5,461
Accrued expenses and other current liabilities	18,353	16,768
Operating lease liabilities	(14,620)	(11,976)
Other noncurrent assets and liabilities	832	(3,845)
Net cash provided by operating activities	143,259	101,728
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property and equipment	(11,744)	(12,871)
Other investing cash flows	0	541
Business acquisitions, net of cash acquired	(18,852)	0
Net cash used in investing activities	(30,596)	(12,330)
CASH FLOWS FROM FINANCING ACTIVITIES:
Exercise of stock options, vesting of restricted stock, and related tax withholdings	(93)	(904)
Proceeds from issuance of debt	355,200	0
Repayments of debt	(8,832)	(6,937)
Retirement of debt	(352,009)	(125,000)
Deferred financing costs	(2,880)	0
Net proceeds from issuance of common stock	0	118,934
Debt prepayment fees	(2,458)	0
Other financing cash flows	0	(2,500)
Net cash (used in) provided by financing activities	(11,072)	(16,407)
NET INCREASE IN CASH AND CASH EQUIVALENTS	101,591	72,991
Cash and cash equivalents - beginning of the period	99,265	67,056
CASH AND CASH EQUIVALENTS - END OF PERIOD	200,856	140,047
Supplemental disclosure of cash flow information:
Cash paid for interest	52,002	73,224
Cash paid for income taxes	2,719	2,373
Cash paid for operating leases	$ 19,631	$ 19,941