Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Assets and Liabilities Recorded at Fair Value (Details)

v3.10.0.1
Fair Value Measurements - Assets and Liabilities Recorded at Fair Value (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Other current assets    
Assets:    
Cash flow swaps and interest rate caps designated as hedges $ 1,800 $ 900
Other assets    
Assets:    
Cash flow swaps and interest rate caps designated as hedges 3,000 5,100
Other accrued liabilities    
Liabilities:    
Cash flow swaps designated as hedges   1,000
Other long-term liabilities    
Liabilities:    
Cash flow swaps designated as hedges   300
Fair Value Based on Significant Other Observable Inputs (Level 2)    
Assets:    
Cash surrender value of life insurance policies 31,395 33,747
Cash flow swaps and interest rate caps designated as hedges 4,839 5,968
Total assets 36,234 39,715
Liabilities:    
Cash flow swaps designated as hedges 0 1,286
Deferred compensation plan 19,848 18,417
Total liabilities $ 19,848 $ 19,703