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Bank Note Payable, Term Loans Payable and Senior Notes (Details) |  |  |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 24, 2020 USD ($) | Oct. 24, 2017 USD ($) | Sep. 27, 2012 USD ($) | Dec. 31, 2020 USD ($) period | Dec. 23, 2020 USD ($) | Dec. 31, 2019 USD ($) | Aug. 02, 2018 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |
Repayments of Unsecured Debt |  |  |  | $ 50,000,000 |  |  |
Unsecured term loan |  |  |  | 717,323,000 |  | $ 765,733,000 |
Portion of future LIBOR-based rate risk |  |  |  | 17,300,000 |  |  |
Borrowings outstanding |  |  |  | $ 3,500,000 |  |  |
Senior Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal amount of loan |  | $ 200,000,000 |  |  |  |  |
Fixed charge coverage ratio |  | 1.50 |  |  |  |  |
Series A Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal amount of loan |  | $ 116,000,000 |  |  |  |  |
Interest rate (as a percent) |  | 3.99% |  |  |  |  |
Series B Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal amount of loan |  | $ 84,000,000 |  |  |  |  |
Interest rate (as a percent) |  | 4.26% |  |  |  |  |
Maximum | Senior Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Unsecured leverage ratio |  | 60.00% |  |  |  |  |
Unsecured leverage ratio for significant acquisition |  | 65.00% |  |  |  |  |
BAML Credit Facility | Federal Funds Rate |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 0.50% |  |  |
BAML Credit Facility | One month LIBOR |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 1.00% |  |  |
BAML Revolver |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted average interest rate (as a percent) |  |  |  | 1.65% |  | 3.67% |
Effective interest rate (as a percent) |  |  |  | 1.34% |  |  |
Total available |  |  |  | $ 600,000,000 |  |  |
Number of periods of extension | period |  |  |  | 2 |  |  |
Length of extension period |  |  |  | 6 months |  |  |
Additional borrowing capacity allowed by exercising an accordion feature |  |  |  | $ 500,000,000 |  |  |
Borrowings outstanding |  |  |  | $ 3,500,000 |  | $ 0 |
Facility fee at period end (as a percent) |  |  |  | 0.25% |  |  |
BAML Revolver | A- | A3 | Minimum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Facility fee (as a percent) |  |  |  | 0.125% |  |  |
BAML Revolver | BBB+ | Baa1 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Facility fee (as a percent) |  |  |  | 0.15% |  |  |
BAML Revolver | BBB | Baa2 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Facility fee (as a percent) |  |  |  | 0.20% |  |  |
BAML Revolver | BBB- | Baa3 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Facility fee (as a percent) |  |  |  | 0.25% |  |  |
BAML Revolver | BBB- | Baa3 | Maximum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Facility fee (as a percent) |  |  |  | 0.30% |  |  |
BAML Revolver | LIBOR |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate at period end (as a percent) |  |  |  | 1.20% |  |  |
BAML Revolver | LIBOR | A- | A3 | Minimum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 0.825% |  |  |
BAML Revolver | LIBOR | BBB+ | Baa1 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 0.875% |  |  |
BAML Revolver | LIBOR | BBB | Baa2 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 1.00% |  |  |
BAML Revolver | LIBOR | BBB- | Baa3 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 1.20% |  |  |
BAML Revolver | LIBOR | BBB- | Baa3 | Maximum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 1.55% |  |  |
BAML Revolver | Base Rate |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate at period end (as a percent) |  |  |  | 0.20% |  |  |
BAML Revolver | Base Rate | A- | A3 | Minimum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 0.00% |  |  |
BAML Revolver | Base Rate | BBB+ | Baa1 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 0.00% |  |  |
BAML Revolver | Base Rate | BBB | Baa2 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 0.00% |  |  |
BAML Revolver | Base Rate | BBB- | Baa3 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 0.20% |  |  |
BAML Revolver | Base Rate | BBB- | Baa3 | Maximum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 0.55% |  |  |
BAML Term Loan |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal amount of loan |  |  |  | $ 400,000,000 |  |  |
Effective interest rate (as a percent) |  |  |  | 2.47% |  |  |
Additional borrowing capacity allowed by exercising an accordion feature |  |  |  | $ 500,000,000 |  |  |
Amount drawn down |  |  | $ 400,000,000 |  |  |  |
BAML Term Loan | LIBOR |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate at period end (as a percent) |  |  |  | 1.35% |  |  |
Fixed rate (as a percent) |  |  |  | 1.12% |  |  |
BAML Term Loan | LIBOR | A- | A3 | Minimum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 0.90% |  |  |
BAML Term Loan | LIBOR | BBB+ | Baa1 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 0.95% |  |  |
BAML Term Loan | LIBOR | BBB | Baa2 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 1.10% |  |  |
BAML Term Loan | LIBOR | BBB- | Baa3 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 1.35% |  |  |
BAML Term Loan | LIBOR | BBB- | Baa3 | Maximum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 1.75% |  |  |
BAML Term Loan | Base Rate |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate at period end (as a percent) |  |  |  | 0.35% |  |  |
BAML Term Loan | Base Rate | A- | A3 | Minimum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 0.00% |  |  |
BAML Term Loan | Base Rate | BBB+ | Baa1 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 0.00% |  |  |
BAML Term Loan | Base Rate | BBB | Baa2 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 0.10% |  |  |
BAML Term Loan | Base Rate | BBB- | Baa3 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 0.35% |  |  |
BAML Term Loan | Base Rate | BBB- | Baa3 | Maximum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 0.75% |  |  |
JPM Term Loan |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal amount of loan |  |  |  |  |  |  | $ 150,000,000
Repayments of Unsecured Debt | $ 50,000,000 |  |  |  |  |  |
Unsecured term loan |  |  |  |  | $ 100,000,000 |  |
Portion of future LIBOR-based rate risk |  |  |  | $ 100,000,000 |  |  |
Number of periods of extension |  |  |  | 2 |  |  |
Length of extension period |  |  |  | 6 months |  |  |
JPM Term Loan | Hedged portion |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Portion of future LIBOR-based rate risk |  |  |  | $ 100,000,000 |  |  |
Effective interest rate (as a percent) |  |  |  | 3.69% |  |  |
JPM Term Loan | Unhedged portion |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted average interest rate (as a percent) |  |  |  | 1.90% |  | 3.54% |
Portion of future LIBOR-based rate risk |  |  |  | $ 50,000,000 |  |  |
JPM Term Loan | Federal Funds Rate |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 0.50% |  |  |
JPM Term Loan | LIBOR |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 1.00% |  |  |
Basis spread on variable rate at period end (as a percent) |  |  |  | 1.25% |  |  |
JPM Term Loan | LIBOR | Hedged portion |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Fixed rate (as a percent) |  |  |  | 2.44% |  |  |
JPM Term Loan | LIBOR | A- | A3 | Minimum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 85.00% |  |  |
JPM Term Loan | LIBOR | BBB+ | Baa1 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 90.00% |  |  |
JPM Term Loan | LIBOR | BBB | Baa2 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 100.00% |  |  |
JPM Term Loan | LIBOR | BBB- | Baa3 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 125.00% |  |  |
JPM Term Loan | LIBOR | BBB- | Baa3 | Maximum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 165.00% |  |  |
JPM Term Loan | Base Rate |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate at period end (as a percent) |  |  |  | 0.25% |  |  |
JPM Term Loan | Base Rate | BBB- | Baa3 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 25.00% |  |  |
JPM Term Loan | Base Rate | BBB- | Baa3 | Maximum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 65.00% |  |  |
BMO Term Loan |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal amount of loan |  |  |  | $ 220,000,000 |  |  |
Additional loans allowed by exercising an accordion feature |  |  |  | $ 100,000,000 |  |  |
Effective interest rate (as a percent) |  |  |  | 3.64% |  |  |
BMO Term Loan | Federal Funds Rate |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 0.50% |  |  |
BMO Term Loan | LIBOR |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate at period end (as a percent) |  |  |  | 1.25% |  |  |
Fixed rate (as a percent) |  |  |  | 2.32% |  |  |
BMO Term Loan | LIBOR | Hedged portion |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Fixed rate (as a percent) |  |  |  | 2.39% |  |  |
BMO Term Loan | LIBOR | A- | A3 | Minimum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 85.00% |  |  |
BMO Term Loan | LIBOR | BBB+ | Baa1 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 90.00% |  |  |
BMO Term Loan | LIBOR | BBB | Baa2 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 100.00% |  |  |
BMO Term Loan | LIBOR | BBB- | Baa3 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 125.00% |  |  |
BMO Term Loan | LIBOR | BBB- | Baa3 | Maximum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 165.00% |  |  |
BMO Term Loan | Base Rate |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate at period end (as a percent) |  |  |  | 0.25% |  |  |
BMO Term Loan | Base Rate | BBB- | Baa3 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 25.00% |  |  |
BMO Term Loan | Base Rate | BBB- | Baa3 | Maximum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 65.00% |  |  |
BMO Term Loan | One month LIBOR |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  | 1.00% |  |  |
Tranche A Term Loan |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal amount of loan |  |  |  | $ 55,000,000 |  |  |
Tranche B Term Loan |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal amount of loan |  |  |  | $ 165,000,000 |  |  |

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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 The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. + References No definition available. + Details
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- Definition The effective interest rate at the end of 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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- Definition The cash inflow from the issuance of long-term debt that is not secured by collateral. Excludes proceeds from tax exempt unsecured debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
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- Definition The cash outflow to repay long-term debt that is not secured by collateral. Excludes repayments of tax exempt unsecured debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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