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Long-Term Debt - Additional Information (Details) |  | 12 Months Ended
--- | --- | ---
Mar. 03, 2020 USD ($) Bank | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Debt Instrument [Line Items] |  |  |  |
Credit facility group, number of commercial banks | Bank | 10 |  |  |
Line of credit facility, expiration date |  | Mar. 03, 2025 |  |
Line of credit facility, swing line commitment amount | $ 25,000,000.0 |  |  |
Line of credit facility, maximum borrowing capacity | 60,000,000.0 |  |  |
Line of credit facility, additional revolving credit commitments under existing loan facility | $ 300,000,000.0 |  |  |
Line of credit facility, leverage ratio covenant | 400.00% | 20.00% | 15.00% |
Line of credit facility, interest coverage ratio covenant | 300.00% |  |  |
Line of credit facility, leverage ratio covenant step-up pursuant to permitted acquisitions | 425.00% |  |  |
Line of credit facility, remaining borrowing capacity |  | $ 474,000,000.0 |  |
Line of credit facility, current borrowing capacity |  | 276,100,000 |  |
Amortization of debt issuance costs |  | $ 710,000 | $ 507,000 | $ 510,000
Number of letters of credit, outstanding |  | 10 | 9 |
Letters of credit outstanding, amount |  | $ 2,700,000 | $ 3,000,000.0 |
Federal Funds Open Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt instrument, basis spread on variable rate | 0.50% |  |  |
London Interbank Offered Rate (LIBOR) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt instrument, basis spread on variable rate |  | 1.75% |  |
Debt instrument, LIBOR based borrowing interest rate |  | 1.89% |  |
Revolving Credit |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit facility, maximum borrowing capacity | $ 600,000,000.0 |  |  |
Term Loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt instrument, principal amount | 200,000,000.0 |  |  |
Line of credit facility | 200,000,000.0 |  |  |
Swing Line Loans |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit facility | 75,000,000.0 |  |  |
Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit facility, swing line commitment amount | $ 75,000,000.0 |  |  |
Line of credit facility, commitment fee unused capacity | 0.25% |  |  |
Maximum | London Interbank Offered Rate (LIBOR) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt instrument, basis spread on variable rate | 2.00% |  |  |
Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit facility, commitment fee unused capacity | 0.13% |  |  |
Minimum | London Interbank Offered Rate (LIBOR) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt instrument, basis spread on variable rate | 1.00% |  |  |

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- Definition Line of Credit Facility Additional Revolving Credit Commitments Under Existing Loan Facility + References No definition available. + Details
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- Definition Represents the minimum interest coverage ratio under the credit facility's financial covenants. + References No definition available. + Details
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- Definition Represents the maximum leverage ratio under the line of credit facility covenant. + References No definition available. + Details
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- Definition Line of credit facility leverage ratio covenant increase pursuant to permitted acquisitions. + References No definition available. + Details
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- Definition Line of credit facility, swing line commitment amount. + References No definition available. + Details
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- Definition Number of letters of credit outstanding. + References No definition available. + Details
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- Definition Amount of amortization expense attributable to debt issuance costs. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(8)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + 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(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: 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=120398452&loc=d3e534808-122878 Reference 3: 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(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Date the credit facility terminates, in CCYY-MM-DD format. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility. + References No definition available. + Details
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