Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
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Earnings Per Share - Narrative (Details) - $ / shares	12 Months Ended
Earnings Per Share - Narrative (Details) - $ / shares	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Exercise of price warrants (in dollars per share)			$ 61.40
Warrant
Class of Stock [Line Items]
Antidilutive securities excluded from computation (in shares)			219,909
Stock options
Class of Stock [Line Items]
Antidilutive securities excluded from computation (in shares)	1,000	32,316	60,287
Weighted average exercise price of stock options (in dollars per share)	$ 30.45
Restricted stock units
Class of Stock [Line Items]
Antidilutive securities excluded from computation (in shares)	183,168		663,817