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Long Term Debt - Amendment of Credit Agreement (Detail) - USD ($) $ in Thousands |  |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Mar. 29, 2018 | Nov. 28, 2017 | Jun. 16, 2017 | Dec. 15, 2016 | Jun. 13, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Issue Cost Paid | $ 4,962 | [1] | $ 330 | [1] | $ 521 | [1] | $ 2,446 | [1] | $ 783 | [1] | $ 28,700 | $ 29,815 |
Loss on Debt Amendment | $ 1,484 | [2] | $ 331 | [2] | $ 190 | [2] | $ 161 | [2] | $ 249 | [2] | $ 1,484 | $ 521 | $ 13,445
Amended Credit Agreement June 13, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Nature of Amendment |  |  |  |  |  |  |  |  |  |  | Reduced term loan interest rate by 0.25% |  |
Amended Credit Agreement December 15, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Nature of Amendment |  |  |  |  |  |  |  |  |  |  | Reduced term loan interest rate by 0.50% |  |
Amended Credit Agreement June 16, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Nature of Amendment |  |  |  |  |  |  |  |  |  |  | Reduced term loan interest rate by 0.25%; modified certain definitions and other provisions in the Credit Agreement |  |
Amended Credit Agreement November 28, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Nature of Amendment |  |  |  |  |  |  |  |  |  |  | Extended maturity of revolving credit line to December 2022; reduced the interest rate applicable to borrowings under the credit line |  |
Amended Credit Agreement March 29, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Nature of Amendment |  |  |  |  |  |  |  |  |  |  | Extended maturity of term loan to March 2025; reduced term loan interest rate by 0.25%; reduced real property mortgage requirements |  |
[1] | Reflected as a reduction of long term debt on the consolidated balance sheet.
[2] | Reflected as a loss on debt amendments and refinancing on the consolidated statement of income for the year in which the amendments were effective.

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- Definition Losses recorded as a result of amendments made to debt agreementss. + References No definition available. + Details
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- Definition Nature of amendment description. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399 + Details
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