UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (2,861)	$ (19,910)
Adjustments to reconcile net loss to net cash provided by operations:
Depreciation and amortization expense	17,716	21,844
Non-cash operating lease costs	3,810	4,764
Deferred income taxes - net	634	300
Loss on extinguishment of debt	12,403	0
Amortization of deferred financing costs	1,253	1,396
Equity in earnings of joint ventures	(1,205)	(562)
Stock-based incentive compensation expense	1,205	757
Other adjustments	96	(882)
Changes in operating assets and liabilities:
Accounts receivable, net	4,450	(12,781)
Inventories	(15,021)	(23,252)
Prepaid expenses and other current assets	12,946	3,603
Accounts payable	8,026	42,302
Accrued compensation and employee benefits	(18,208)	6,651
Accrued expenses and other current liabilities	(2,357)	(1,650)
Operating lease liabilities	(5,160)	(4,740)
Other noncurrent assets and liabilities	653	563
Net cash provided by operating activities	18,380	18,403
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property and equipment	(3,123)	(5,353)
Net cash used in investing activities	(3,123)	(5,353)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of debt	355,200	0
Exercise of stock options, vesting of restricted stock, and related tax withholdings	(69)	(549)
Repayments of debt	(2,944)	(2,313)
Deferred financing costs	(2,880)	0
Debt prepayment fees	(2,458)	0
Retirement of debt	(352,009)	0
Net cash used in financing activities	(5,160)	(2,862)
NET INCREASE IN CASH AND CASH EQUIVALENTS	10,097	10,188
Cash and cash equivalents - beginning of the period	99,265	67,056
CASH AND CASH EQUIVALENTS - END OF PERIOD	109,362	77,244
Supplemental disclosure of cash flow information:
Cash paid for interest	21,502	25,936
Cash paid for income taxes	111	307
Cash paid for operating leases	$ 6,768	$ 6,798