Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Other intangible assets:
Estimated Fair Value	$ 60,900	$ 60,900
Accumulated Amortization	15,520	11,483
Net Carrying Amount	45,380	49,417
Customer relationships
Other intangible assets:
Estimated Fair Value	42,000	42,000
Accumulated Amortization	6,682	3,818
Net Carrying Amount	35,318	38,182
Other
Other intangible assets:
Estimated Fair Value	18,900	18,900
Accumulated Amortization	8,838	7,665
Net Carrying Amount	$ 10,062	$ 11,235