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Long-Term Debt - Additional Information (Detail) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 | Sep. 27, 2018 | Dec. 31, 2017
Maximum [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Long-term debt covenants aggregate leverage ratio | 2.5 |  |
Term Loan [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Long-term debt | $ 252,000,000 |  | $ 225,000,000
Revolving credit loan and term loan carried interest | 6.50% |  |
Revolving credit facility and term loan maturity date | Nov. 01, 2023 |  |
Additional borrowings term loan |  | $ 35,000,000 |
Term Loan [Member] | Floor Rate [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Term loan facility interest rate | 1.00% |  |
Revolving Credit Loan [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Revolving credit facility maximum commitment | $ 20,000,000 |  | $ 20,000,000
Revolving credit loan and term loan carried interest | 6.50% |  | 5.50%
Remaining commitments under the revolving credit loan facility | $ 20,000,000 |  |
Revolving credit facility and term loan maturity date | Nov. 17, 2022 |  |
June 30, 2018 through December 31, 2018 [Member] | First Mortgage [Member] | Maximum [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Long-term debt covenants aggregate leverage ratio | 6.0 |  |
March 31, 2019 through December 31, 2019 [Member] | First Mortgage [Member] | Maximum [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Long-term debt covenants aggregate leverage ratio | 5.75 |  |
March 31, 2020 and thereafter [Member] | First Mortgage [Member] | Maximum [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Long-term debt covenants aggregate leverage ratio | 5.25 |  |
Existing Credit Agreement [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Long-term debt | $ 252,000,000 |  |
Mandatory prepayments of consolidated excess cash flow due period | 95 days |  |
Mandatory prepayments of consolidated excess cash flow required by existing credit agreement | Commencing with the year ending December 31, 2018, the credit agreement requires mandatory prepayments equal to 50% of Excess Cash Flow (as defined in the credit agreement) when the Company’s Total Leverage Ratio (as defined in the credit agreement) is greater than 3.5x; mandatory prepayments equal to 25% of Excess Cash Flow when the Total Leverage Ratio is less than or equal to 3.5x but greater than 3.0x; and no mandatory prepayments when the Total Leverage Ratio is less than or equal to 3.0x. |  |
Existing Credit Agreement [Member] | Leverage Ratio Greater than 3.5 Times [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Mandatory prepayments of excess cash flow | 50.00% |  |
Existing Credit Agreement [Member] | Leverage Ratio Less than or Equal To 3.5 Times and Greater than 3.0 Times [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Mandatory prepayments of excess cash flow | 25.00% |  |
Existing Credit Agreement [Member] | Leverage Ratio Less than or Equal to 3.0 Times [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Mandatory prepayments of excess cash flow | 0.00% |  |
New Credit Agreement [Member] | LIBOR [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Credit facility interest rate margins | 4.00% |  |
New Credit Agreement [Member] | Base Rate [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Credit facility interest rate margins | 3.00% |  |

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- Definition Maximum consolidated total debt ratio permitted by credit agreement. Consolidated total debt ratio compares consolidated total debt on the last day of each fiscal quarter to consolidated operating cash flow for the four quarters then ended. + References No definition available. + Details
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- Definition Mandatory prepayments of consolidated excess cash flow required by credit agreement. + References No definition available. + Details
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- Definition Mandatory prepayments of consolidated excess cash flow required by the first lien credit agreement when consolidated total debt is equal to or greater than three times consolidated operating cash flow. + References No definition available. + Details
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- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: 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(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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