LEASES (Tables)

12 Months Ended

Dec. 31, 2020

Leases

Schedule of components of lease expense

	Year Ended December 31
	2020		2019
	(in thousands)
Operating lease expense	$	24,559	$	22,291
Variable lease expense		3,152		3,366
Sublease income		(398)		(324)
Total operating lease expense(1)	$	27,313	$	25,333

(1) Operating lease expense excludes short-term leases with a term of 12 months or less.

Schedule of operating cash flows from operating lease activity

	Year Ended December 31
	2020		2019
	(in thousands)
Noncash change in operating right-of-use assets	$	21,184	$	20,439
Change in operating lease liabilities		(20,428)		(19,711)
Operating right-of-use-assets and lease liabilities, net	$	756	$	728
Cash paid for amounts included in the measurement of operating lease liabilities	$	(23,810)	$	(21,714)

Schedule of supplemental balance sheet information related to lease liabilities

	December 31, 2020
	(in thousands, except lease term and discount rate)
			Land and		Equipment
		Total	Structures		and Others
Operating right-of-use assets (long-term)	$	115,195	$	114,908	$	287
Operating lease liabilities (current)	$	21,482	$	21,207	$	275
Operating lease liabilities (long-term)		97,839		97,828		11
Total operating lease liabilities	$	119,321	$	119,035	$	286
Weighted-average remaining lease term (in years)		6.7
Weighted-average discount rate		3.18%

	December 31, 2019
	(in thousands, except lease term and discount rate)
			Land and		Equipment
		Total	Structures		and Others
Operating right-of-use assets (long-term)	$	68,470	$	67,227	$	1,243
Operating lease liabilities (current)	$	20,265	$	19,293	$	972
Operating lease liabilities (long-term)		52,277		52,008		269
Total operating lease liabilities	$	72,542	$	71,301	$	1,241
Weighted-average remaining lease term (in years)		5.3
Weighted-average discount rate		3.77%

Schedule of maturities of operating lease liabilities

					Equipment
			Land and		and
	Total		Structures		Other
	(in thousands)
2021	$	24,629	$	24,352	$	277
2022		21,073		21,062		11
2023		16,755		16,755		—
2024		14,668		14,668		—
2025		12,153		12,153		—
Thereafter		43,035		43,035		—
Total lease payments		132,313		132,025		288
Less imputed interest		(12,992)		(12,990)		(2)
Total	$	119,321	$	119,035	$	286