Leases (Tables)

12 Months Ended

Dec. 31, 2020

Leases [Abstract]

Components of Lease Expense

The components of lease expense were as follows:

	Year ended December 31
(in thousands)	2020		2019
Operating lease cost	$	113,669	$	104,007
Short-term and month-to-month lease cost	21,862		19,267
Variable lease cost	18,718		20,582
Sublease income	(18,508)		(20,108)
Total net lease cost	$	135,741	$	123,748

Supplemental Cash Flow And Balance Sheet Information Related To Leases

Supplemental information related to leases was as follows:

	Year ended December 31
(in thousands)	2020			2019
Cash Flow Information:
Operating cash flows from operating leases (payments)	$	113,664		$	112,671
Right-of-use assets obtained in exchange for new operating lease liabilities (noncash)	27,031			236,714
	As of December 31
	2020			2019
Balance Sheet Information:
Lease right-of-use assets	$	462,560		$	526,417
Current lease liabilities	$	86,797		$	92,714
Noncurrent lease liabilities	428,849			477,004
Total lease liabilities	$	515,646		$	569,718
Weighted average remaining lease term (years)	9.9			10.5
Weighted average discount rate	4.4		%	4.3		%

Maturities of Operating Lease Liabilities

At December 31, 2020, maturities of lease liabilities were as follows:

(in thousands)	December 31, 2020
2021	$	106,994
2022	88,721
2023	71,003
2024	57,310
2025	45,968
Thereafter	280,837
Total payments	650,833
Less: Imputed interest	(135,187)
Total	$	515,646