Quarterly report pursuant to Section 13 or 15(d)

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

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Fair Value Measurements - Assets and Liabilities Recorded at Fair Value (Detail) - Fair Value Based on Significant Other Observable Inputs (Level 2) [Member] - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Assets:    
Cash surrender value of life insurance policies $ 32,383 $ 31,475
Cash flow swaps designated as hedges 2,428 2,772
Total assets 34,811 34,247
Liabilities:    
Cash flow swaps designated as hedges 3,646 6,135
Cash flow swaps not designated as hedges 68 346
Deferred compensation plan 16,578 14,824
Total liabilities $ 20,292 $ 21,305