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Description of Business and Summary of Significant Accounting Policies - Summary of Prepaid Expense and Other Assets (Detail) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Prepaid Expense and Other Assets [Abstract] |  |
Peterson note receivable |  | $ 6,785
Prepaid expenses | $ 14,001 | 15,992
Inventories | 8,065 | 8,051
Deferred software costs | 2,796 | 3,832
Supplemental deferred compensation plan assets | 22,204 | 19,289
Other | 8,345 | 8,430
Total prepaid expenses and other assets | $ 55,411 | $ 62,379

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