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Commitments and Contingencies - Corporate-owned Life Insurance Trusts (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2020
USD ($)
Jun. 30, 2020
USD ($)
item
Corporate-owned life insurance trusts    
Number of life insurance trusts held for former executive officers | item   3
Corporate-owned life insurance cash surrender value   $ 10,734
Corporate-owned life insurance liability   12,218
Corporate-owned life insurance short-fall   (1,484)
Consolidation of corporate-owned life insurance trusts $ (1,281)  
Retained Deficit    
Corporate-owned life insurance trusts    
Consolidation of corporate-owned life insurance trusts $ (1,281) (1,300)
Trust #1    
Corporate-owned life insurance trusts    
Corporate-owned life insurance cash surrender value   4,958
Corporate-owned life insurance liability   5,641
Corporate-owned life insurance short-fall   (683)
Trust #2    
Corporate-owned life insurance trusts    
Corporate-owned life insurance cash surrender value   3,796
Corporate-owned life insurance liability   4,425
Corporate-owned life insurance short-fall   (629)
Trust #3    
Corporate-owned life insurance trusts    
Corporate-owned life insurance cash surrender value   1,980
Corporate-owned life insurance liability   2,152
Corporate-owned life insurance short-fall   $ (172)