Quarterly report pursuant to Section 13 or 15(d)

Fair Value - Assets and Liabilities on a Recurring Basis (Details)

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Fair Value - Assets and Liabilities on a Recurring Basis (Details) - Recurring - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Assets:    
Other long-term assets $ 5,569 $ 4,840
Total Assets 5,569 4,840
Liabilities:    
Long term debt 281,552 312,384
Interest rate swaps 3 2,178
Total Liabilities 285,099 318,191
Henderson    
Liabilities:    
Earnout 444 529
Dejana    
Liabilities:    
Earnout $ 3,100 $ 3,100