Fair Value Measurements - Financial Assets and Liabilities, Recurring (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Assets
Deferred compensation plan	$ 19,882	$ 18,381
Derivative instruments	1,682	47
Liabilities
Deferred compensation plan	28,489	27,012
Recurring basis
Assets
Deferred compensation plan	19,882	18,381
Derivative instruments	1,682	47
Total assets	21,564	18,428
Liabilities
Deferred compensation plan	28,489	27,012
Derivative instruments	17,405	25
Total liabilities	45,894	27,037
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Recurring basis
Assets
Deferred compensation plan	19,882	18,381
Derivative instruments	0	0
Total assets	19,882	18,381
Liabilities
Deferred compensation plan	28,489	27,012
Derivative instruments	0	0
Total liabilities	28,489	27,012
Significant Other Observable Inputs (Level 2) \| Recurring basis
Assets
Deferred compensation plan	0	0
Derivative instruments	1,381	44
Total assets	1,381	44
Liabilities
Deferred compensation plan	0	0
Derivative instruments	3,270	0
Total liabilities	3,270	0
Significant Unobservable Inputs (Level 3) \| Recurring basis
Assets
Deferred compensation plan	0	0
Derivative instruments	301	3
Total assets	301	3
Liabilities
Deferred compensation plan	0	0
Derivative instruments	14,135	25
Total liabilities	$ 14,135	$ 25

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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