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Goodwill and Other Intangible Assets - Carrying amounts of goodwill by reportable segment (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Carrying amounts of goodwill by reportable segment
Goodwill, gross	$ 11,288
Accumulated impairment losses	(11,288)
Goodwill		$ 11,288	$ 11,288
Retail Financial Services
Carrying amounts of goodwill by reportable segment
Goodwill, gross	11,288
Accumulated impairment losses	$ (11,288)