Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Financial Assets and Liabilities (Details)

v3.19.1
Fair Value Measurements - Financial Assets and Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Earn-out obligation - short-term $ 10,700 $ 0
Earn-out obligation - long-term 14,300 0
Fair Value, Measurements, Recurring | Level 1 | Other assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Non-COLI assets held in Deferred Supplemental Compensation Plan 563 403
Fair Value, Measurements, Recurring | Level 2 | Accrued expenses/Other current assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Interest rate swap agreements 727 195
Fair Value, Measurements, Recurring | Level 3 | Earn-out obligation    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Earn-out obligation - short-term 10,700 0
Earn-out obligation - long-term $ 14,300 $ 0