LEASES (Tables)

12 Months Ended

Dec. 31, 2021

LEASES

Schedule of components of lease expense

	Year Ended December 31
	2021		2020		2019
	(in thousands)
Operating lease expense	$	26,552	$	24,559	$	22,291
Variable lease expense		4,128		3,152		3,366
Sublease income		(626)		(398)		(324)
Total operating lease expense(1)	$	30,054	$	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
	2021		2020		2019
	(in thousands)
Noncash change in operating right-of-use assets	$	24,023	$	21,184	$	20,439
Change in operating lease liabilities		(23,400)		(20,428)		(19,711)
Operating right-of-use-assets and lease liabilities, net	$	623	$	756	$	728
Cash paid for amounts included in the measurement of operating lease liabilities	$	(25,909)	$	(23,810)	$	(21,714)

Schedule of supplemental balance sheet information related to lease liabilities

	December 31, 2021
	(in thousands, except lease term and discount rate)
			Land and		Equipment
		Total	Structures		and Others
Operating right-of-use assets (long-term)	$	106,686	$	106,394	$	292
Operating lease liabilities (current)	$	22,740	$	22,477	$	263
Operating lease liabilities (long-term)		88,835		88,810		25
Total operating lease liabilities	$	111,575	$	111,287	$	288
Weighted-average remaining lease term (in years)		6.9
Weighted-average discount rate		2.88%

	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%

Schedule of maturities of operating lease liabilities

					Equipment
			Land and		and
	Total		Structures(1)		Other
	(in thousands)
2022	$	25,567	$	25,302	$	265
2023		19,800		19,775		25
2024		17,414		17,414		—
2025		14,839		14,839		—
2026		11,404		11,404		—
Thereafter		33,750		33,750		—
Total lease payments		122,774		122,484		290
Less imputed interest		(11,199)		(11,197)		(2)
Total	$	111,575	$	111,287	$	288

(1) Excludes future minimum lease payments for leases which were executed but had not yet commenced as of December 31, 2021 of $85.3 million which will be paid over 10-12 years. The Company plans to take possession of the leased spaces during 2022.