UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 28,955	$ (27,578)
Adjustments to reconcile net income (loss) to net cash provided by operations:
Depreciation and amortization expense	35,705	41,813
Non-cash operating lease costs	5,766	11,240
Deferred income taxes - net	907	598
Loss on extinguishment of debt	12,403	0
Amortization of deferred financing costs	2,512	2,764
Loss on interest rate swaps upon discontinuing hedge accounting	0	3,746
Equity in earnings of joint ventures	(2,891)	(1,574)
Stock-based incentive compensation expense	3,730	1,418
Other adjustments	261	(769)
Changes in operating assets and liabilities:
Accounts receivable, net	(9,866)	4,194
Inventories	(14,651)	(33,239)
Prepaid expenses and other current assets	4,627	1,199
Accounts payable	26,532	36,422
Accrued compensation and employee benefits	(907)	1,977
Accrued expenses and other current liabilities	6,425	13,767
Operating lease liabilities	(8,277)	(9,382)
Other noncurrent assets and liabilities	803	6,794
Net cash provided by operating activities	92,034	53,390
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property and equipment	(6,808)	(9,269)
Other investing cash flows	0	541
Business acquisitions, net of cash acquired	(18,852)	0
Net cash used in investing activities	(25,660)	(8,728)
CASH FLOWS FROM FINANCING ACTIVITIES:
Exercise of stock options, vesting of restricted stock, and related tax withholdings	(78)	(645)
Proceeds from issuance of debt	355,200	0
Repayments of debt	(5,888)	(4,625)
Retirement of debt	(352,009)	0
Deferred financing costs	(2,880)	0
Debt prepayment fees	(2,458)	0
Other financing cash flows	0	11,651
Net cash (used in) provided by financing activities	(8,113)	6,381
NET INCREASE IN CASH AND CASH EQUIVALENTS	58,261	51,043
Cash and cash equivalents - beginning of the period	99,265	67,056
CASH AND CASH EQUIVALENTS - END OF PERIOD	157,526	118,099
Supplemental disclosure of cash flow information:
Cash paid for interest	37,405	53,199
Cash paid for income taxes	1,168	1,887
Cash paid for operating leases	$ 12,909	$ 13,388