Business Segments - Reconciliation of total segment assets to total combined assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 593,188	$ 600,792
Restricted cash	52	52
Total reportable segment assets
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	393,729	400,319
All Other
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	5,955	5,955
Other unallocated amounts
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 193,452	$ 194,466