Quarterly report pursuant to Section 13 or 15(d)

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

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Fair Value Measurements - Assets and Liabilities Recorded at Fair Value (Details) - Fair Value Based on Significant Other Observable Inputs (Level 2) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Assets:    
Cash surrender value of life insurance policies $ 31,807 $ 31,395
Cash flow swaps and interest rate caps designated as hedges 2,490 4,839
Total assets 34,297 36,234
Liabilities:    
Deferred compensation plan 17,269 19,848
Total liabilities 17,269 19,848
Other current assets    
Assets:    
Cash flow swaps and interest rate caps designated as hedges 1,300 1,800
Other assets    
Assets:    
Cash flow swaps and interest rate caps designated as hedges $ 1,200 3,000
Other accrued liabilities    
Liabilities:    
Cash flow swaps and interest rate caps designated as hedges   0
Other long-term liabilities    
Liabilities:    
Cash flow swaps and interest rate caps designated as hedges   $ 0