LEASES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021		Dec. 31, 2020	Dec. 31, 2019	Jun. 01, 2021
Operating leases:
Operating lease assets	$ 58,236		$ 35,906
Accrued liabilities	14,852		11,589
Operating lease liabilities	56,444		28,344
Total operating lease liabilities	$ 71,296		$ 39,933
Weighted-average remaining lease term (in years)	5 years 7 months 6 days		4 years 8 months 12 days
Weighted-average discount rate	4.70%		3.10%
Finance leases:
Property, plant and equipment, gross	$ 33,359		$ 6,970
Accumulated depreciation	(7,076)		(6,324)
Property, plant and equipment, net	26,283		646
Accrued liabilities	531		459
Other non-current liabilities	27,406		140
Total finance lease liabilities	$ 27,937		$ 599
Weighted-average remaining lease term (in years)	15 years 7 months 6 days		1 year 6 months
Weighted-average discount rate	6.00%		2.00%
Lease expense
Operating lease expense	$ 17,485		$ 20,928	$ 19,113
Amortization of right-of-use assets	1,283		751	915
Interest on lease liabillities	829		20	37
Total finance lease expense	2,112		771	952
Supplemental cash flow information
Lease assets obtained in exchange for lease obligations, operating leases	38,630	[1]	11,000	11,637
Lease assets obtained in exchange for lease liabilities, finance leases	26,941	[2]	0	350
Operating cash flows from operating leases	8,444	[3]	19,026	17,737
Operating cash flows from finance leases	8		20	37
Financing cash flows from finance leases	421		735	$ 883
Lease incentive received	9,410
Maturities of operating lease liabilities
2022	18,793
2023	14,628
2024	13,479
2025	11,326
2026	10,353
Thereafter	17,096
Total lease payments	85,675
Less lease incentive receivable	(2,458)
Less imputed interest	(11,921)
Total operating lease liabilities	71,296		39,933
Maturities of finance lease liabilities
2022	1,313
2023	2,709
2024	2,743
2025	2,777
2026	2,812
Thereafter	31,879
Total lease payments	44,233
Less imputed interest	(16,296)
Total finance lease liabilities	$ 27,937		$ 599
First American [Member]
Supplemental cash flow information
Operating lease assets acquired					$ 24,396
Real estate [Member]
Operating leases:
Weighted-average remaining lease term (in years)	5 years 8 months 12 days
Real estate [Member] | Maximum [Member]
Operating leases:
Remaining lease term	10 years

[1] Operating lease assets obtained during 2021 included $24,396 acquired in conjunction with the acquisition of First American in June 2021 (Note 6).

[2] Finance lease assets obtained during 2021 consisted of a lease on our corporate headquarters located in Minnesota that commenced in July 2021.

[3] Cash paid for operating leases during 2021 was reduced by lease incentives received of $9,410.