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RESTATEMENT - Impact of Restatement Adjustment on Consolidated Cash Flows Statements (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | $ (3,200) | $ (34,800) | $ 2,400 | $ 6,000 | $ 1,300 | $ 13,800 | $ 14,000 | $ 7,600 | $ 12,300 | $ 8,800 | $ 11,900 | $ 5,200 | $ (29,617) | $ 36,765 | $ 38,234
Reconciliation of net income (loss) to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred income taxes |  |  |  |  |  |  |  |  |  |  |  |  | (14,732) | 840 | 1,004
Changes in operating assets and liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade accounts receivable |  |  |  |  |  |  |  |  |  |  |  |  | 44,884 | 7,898 | (24,999)
Inventories |  |  |  |  |  |  |  |  |  |  |  |  | 22,414 | (13,910) | (21,363)
Prepaid expenses and other assets |  |  |  |  |  |  |  |  |  |  |  |  | 13,782 | 5,110 | 187
Accounts payable and accrued expenses |  |  |  |  |  |  |  |  |  |  |  |  | (15,345) | (19,003) | 7,418
Other long-term liabilities |  |  |  |  |  |  |  |  |  |  |  |  | (8,853) | (6,718) | 2,610
Net cash provided by operating activities |  |  |  |  |  |  |  |  |  |  |  |  | 109,650 | 41,306 | 35,840
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition of businesses, net of cash acquired |  |  |  |  |  |  |  |  |  |  |  |  | (115,247) | 0 | (10,811)
Net cash used in investing activities |  |  |  |  |  |  |  |  |  |  |  |  | (121,796) | (22,085) | (17,576)
As Reported |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | $ (2,000) | $ (34,700) | $ 2,100 | $ 5,700 | $ 2,100 | $ 13,200 | $ 13,400 | $ 7,300 | $ 11,100 | $ 8,400 | $ 11,600 | $ 4,500 | (29,074) | 35,775 | 35,521
Reconciliation of net income (loss) to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred income taxes |  |  |  |  |  |  |  |  |  |  |  |  | (14,771) | 1,110 | 1,004
Changes in operating assets and liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade accounts receivable |  |  |  |  |  |  |  |  |  |  |  |  | 42,909 | 5,560 | (22,487)
Inventories |  |  |  |  |  |  |  |  |  |  |  |  | 22,208 | (14,447) | (20,838)
Prepaid expenses and other assets |  |  |  |  |  |  |  |  |  |  |  |  | 13,053 | 5,110 | 188
Accounts payable and accrued expenses |  |  |  |  |  |  |  |  |  |  |  |  | (14,897) | (15,408) | 7,093
Other long-term liabilities |  |  |  |  |  |  |  |  |  |  |  |  | (8,870) | (6,718) | 2,610
Net cash provided by operating activities |  |  |  |  |  |  |  |  |  |  |  |  | $ 107,675 | $ 41,306 | $ 35,840

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