Employee Benefit Plans - Tax Effect on Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Amounts in Accumulated Other Comprehensive Loss Expected to be Recognized in Net Periodic Benefit Costs
Net actuarial loss	$ (10,946)	$ (17,064)
Deferred tax benefit		$ 2,000	$ 2,000

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from pension benefits.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 6
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32621-109319

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant