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Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2023
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On January 31, 2024, the Company detected unauthorized activity on portions of its information technology (IT) systems. WLFC believes it has fully contained the unauthorized activity and continues to operate and service customers. However, the investigation to assess the complete nature, scope, and impact of the incident, including what data has been exfiltrated or otherwise impacted, remains ongoing. Effective March 8, 2024, in accordance with Amendment No. 4, the Company’s credit facility was reduced from $708.0 million to $658.2 million following the novation of the final WEST VII asset.