Long-term Compensation Plans - Stock Options (Details) - $ / shares	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Stock options (in shares)	242,334	229,724
Weighted average strike price (in dollars per share)	$ 12.25	$ 11.28
Weighted average grant date fair value (in dollars per share)	$ 4.47	$ 5.15

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration