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Credit Agreement - Additional Information (Detail) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Sep. 08, 2021 | Dec. 27, 2018
Line Of Credit Facility [Line Items] |  |  |  |
Revolving credit facility | $ 125,000,000.0 |  |  |
Credit Agreement [Member] |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |
Line of credit facility, interest rate | 0.00% | 0.00% |  |
Credit Agreement [Member] | Wintrust Bank [Member] |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |
Discount interest rate to prime | 1.00% |  |  |
Credit Agreement [Member] | Wintrust Bank [Member] | Minimum [Member] | Prime [Member] |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |
Line of credit facility, interest rate | 3.00% |  |  |
Credit Agreement [Member] | Revolving Credit Facility [Member] | Wintrust Bank [Member] |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |
Revolving credit facility |  |  | $ 125,000,000.0 |
Revolving credit facility maturity date | Sep. 08, 2024 |  |  |
Credit Agreement [Member] | Revolving Credit Facility [Member] | Wintrust Bank [Member] | Maximum [Member] |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |
Line of credit facility, increase | $ 50,000,000.0 |  |  |
Restricted payments covenant | $ 100,000,000.0 |  |  |
Percentage of unrestricted cash cash equivalents and short term investments | 125.00% |  |  |
Credit Agreement [Member] | Revolving Credit Facility | BMO Harris Bank N.A. ("BMO Harris") [Member] |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |
Credit facility borrowings | $ 0 | $ 0 |  | $ 50,000,000.0

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- Definition Discount interest rate to prime. + References No definition available. + Details
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- Definition Percentage of unrestricted cash, cash equivalents and short term investments. + References No definition available. + Details
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- Definition The amount of restricted payments the Company may make on an annual basis, including payments in connection with a repurchase of shares of common stock, under the Credit Agreement. + References No definition available. + 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 Date the credit facility terminates, in YYYY-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 Amount of increase (decrease), classified as other, of the credit facility. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(f)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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- Definition The effective interest rate during the reporting period. + 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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