Leases (Tables)

12 Months Ended

Dec. 31, 2021

Leases [Abstract]

Schedule of Lease Assets and Liabilities

The following table presents our lease-related assets and liabilities as of December 31, 2021 and 2020 (in thousands):

	Classification on the Consolidated Balance Sheet	December 31, 2021		December 31, 2020
Assets
Operating lease assets	Operating lease right-of-use assets	$	260,778	$	242,155
Finance lease assets	Property, plant and equipment, net	7,666		9,638
Total lease assets		$	268,444	$	251,793
Liabilities
Current
Operating	Operating lease liabilities, current	$	57,814	$	53,632
Finance	Current maturities of long-term debt and finance lease liabilities	3,320		3,995
Noncurrent
Operating	Operating lease liabilities, long-term	220,836		205,362
Finance	Long-term debt and finance lease liabilities	4,717		5,971
Total lease liabilities		$	286,687	$	268,960

Schedule of Lease Costs

The following table presents information related to our lease expense for the years ended December 31, 2021, 2020, and 2019 (in thousands):

	2021		2020		2019
Finance lease expense:
Amortization expense	$	4,255	$	4,562	$	4,575
Interest expense	255		355		427
Operating lease expense	70,928		69,208		66,650
Short-term lease expense (1)	150,500		139,706		149,528
Variable lease expense	5,421		5,441		4,924
Total lease expense	$	231,359	$	219,272	$	226,104

_________________

(1)Short-term lease expense includes both leases and rentals with initial terms of one year or less and predominantly represents equipment used on construction projects.

Sublease rental income was approximately $0.2 million for the year ended December 31, 2021, and $0.5 million for each of the years ended December 31, 2020 and 2019.

Lease Term and Discount Rate

The following table presents certain information related to the lease terms and discount rates for our leases as of December 31, 2021 and 2020:

	December 31, 2021		December 31, 2020
Weighted-average remaining lease term:
Operating leases	6.4 years		6.6 years
Finance leases	2.9 years		3.1 years
Weighted-average discount rate:
Operating leases	3.20	%	3.59	%
Finance leases	2.61	%	3.24	%

Other Information

The following table presents supplemental cash flow information related to our leases for the years ended December 31, 2021, 2020, and 2019 (in thousands):

	2021		2020		2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows used for operating leases	$	69,797	$	65,016	$	65,757
Operating cash flows used for finance leases	$	255	$	355	$	427
Financing cash flows used for finance leases	$	4,189	$	4,470	$	4,571
Right-of-use assets obtained in exchange for new operating lease liabilities	$	80,661	$	55,895	$	84,089
Right-of-use assets obtained in exchange for new finance lease liabilities	$	2,301	$	4,558	$	5,311

Schedule of Maturity of Operating Leases

The following table reconciles our future minimum lease payments on an undiscounted cash flow basis to our lease liabilities reported in the Consolidated Balance Sheet as of December 31, 2021 (in thousands):

	Operating Leases		Finance Leases
2022	$	65,528	$	3,469
2023	56,229		2,238
2024	45,037		1,742
2025	36,077		705
2026	29,044		140
Thereafter	77,556		10
Total minimum lease payments	309,471		8,304
Less: Amount of lease payments representing interest	(30,821)		(267)
Present value of future minimum lease payments	$	278,650	$	8,037
Current portion of lease liabilities	$	57,814	$	3,320
Noncurrent portion of lease liabilities	220,836		4,717
Present value of future minimum lease payments	$	278,650	$	8,037

Schedule of Maturity of Finance Leases

The following table reconciles our future minimum lease payments on an undiscounted cash flow basis to our lease liabilities reported in the Consolidated Balance Sheet as of December 31, 2021 (in thousands):

	Operating Leases		Finance Leases
2022	$	65,528	$	3,469
2023	56,229		2,238
2024	45,037		1,742
2025	36,077		705
2026	29,044		140
Thereafter	77,556		10
Total minimum lease payments	309,471		8,304
Less: Amount of lease payments representing interest	(30,821)		(267)
Present value of future minimum lease payments	$	278,650	$	8,037
Current portion of lease liabilities	$	57,814	$	3,320
Noncurrent portion of lease liabilities	220,836		4,717
Present value of future minimum lease payments	$	278,650	$	8,037