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Debt - Additional Information (Details) - USD ($) |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jul. 29, 2014 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2020 | Aug. 18, 2020 | Oct. 31, 2016
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate |  | 3.50% |  |  |  |  |
Finance Lease, Liability |  | $ 20,800,000 | $ 22,000,000.0 |  |  |  |
Unamortized Debt Issuance Expense |  | (6,900,000) | (8,100,000) |  |  |  |
Net long-term portion |  | 716,400,000 | 884,500,000 |  |  |  |
Proceeds from Equity Method Investment, Distribution, Return of Capital |  | 718,100,000 | 902,400,000 |  |  |  |
Proceeds from long-term debt, net |  | 275,000,000.0 | 296,100,000 | $ 0 |  |  |
Debt retirement costs |  | (5,900,000) | (2,700,000) | 0 |  |  |
Write off of Deferred Debt Issuance Cost |  | 5,900,000 | 2,700,000 | 0 |  |  |
Amortization of deferred issuance costs on debt |  | 2,100,000 | 2,000,000.0 | $ 1,400,000 |  |  |
Long-term Debt and Lease Obligation, Current |  | 1,700,000 | 17,900,000 |  |  |  |
Long-term debt |  | 723,300,000 | 892,600,000 |  |  |  |
Potential additional lines of credit |  | $ 100,000,000 |  |  |  |  |
Ratio of Indebtedness to Net Capital |  | 2.00 |  |  |  |  |
Debt covenant, actual fixed charge ratio |  | 5.1 |  |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  | $ 227,100,000 |  |  |  |  |
Lien leverage ratio |  | 0.0238 |  |  |  |  |
Debt Instrument, Repayment Terms, Percentage Of Principal |  | 0.25% |  |  |  |  |
Long-term Line of Credit |  | $ 0 | 13,500,000 |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months |  | 1,700,000 |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Two |  | 1,600,000 |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Three |  | 1,500,000 |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Four |  | 1,500,000 |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Five |  | 301,700,000 |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal after Year Five |  | 417,000,000.0 |  |  |  |  |
Long-term Debt, Gross |  | $ 725,000,000.0 | 910,500,000 |  |  |  |
Pro Forma |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Lien leverage ratio |  | 0.39 |  |  |  |  |
Minimum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Repayment Terms, Asset Sales, Percentage Of Principal |  | 0.00% |  |  |  |  |
Maximum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Ratio of Indebtedness to Net Capital |  | 4.25 |  |  |  |  |
Debt Instrument, Repayment Terms, Asset Sales, Percentage Of Principal |  | 50.00% |  |  |  |  |
London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt, Weighted Average Interest Rate |  | 3.00% |  |  |  |  |
London Interbank Offered Rate (LIBOR) [Member] | Minimum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate spread |  | 3.00% |  |  |  |  |
London Interbank Offered Rate (LIBOR) [Member] | Maximum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate spread |  | 3.25% |  |  |  |  |
Base Rate [Member] | Minimum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate spread |  | 2.00% |  |  |  |  |
Base Rate [Member] | Maximum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate spread |  | 2.25% |  |  |  |  |
Wells Fargo [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Write off of Deferred Debt Issuance Cost |  | $ 1,000,000.0 |  |  |  |  |
Credit facility, maximum borrowing capacity |  |  |  |  |  |  | $ 200,000,000
Debt Extinguishment Costs, Breakage Fees |  | 1,700,000 |  |  |  |  |
Line of Credit Facility, Fair Value of Amount Outstanding |  |  |  |  |  |  | 135,000,000.0
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net |  | 1,600,000 |  |  |  |  |
Debt Issuance Costs, Line of Credit Arrangements, Net |  | 7,300,000 |  |  |  |  |
Northwest Farm Credit Services, PCA [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity |  |  |  |  |  |  | 200,000,000
Line of Credit Facility, Fair Value of Amount Outstanding |  |  |  |  |  |  | $ 200,000,000.0
Allied Bank Limited [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity |  | 250,000,000 |  |  |  |  |
Potential additional lines of credit |  | $ 100,000,000 |  |  |  |  |
Ratio of Indebtedness to Net Capital |  | 1.10 |  |  |  |  |
Allied Bank Limited [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt, Weighted Average Interest Rate |  | 125.00% |  |  |  |  |
Allied Bank Limited [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt, Weighted Average Interest Rate |  | 175.00% |  |  |  |  |
Allied Bank Limited [Member] | Base Rate [Member] | Minimum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate spread |  | 25.00% |  |  |  |  |
Allied Bank Limited [Member] | Base Rate [Member] | Maximum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate spread |  | 75.00% |  |  |  |  |
Term Loan [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Write off of Deferred Debt Issuance Cost |  | $ 2,600,000 |  |  |  |  |
Debt Instrument, Increase (Decrease), Other, Net |  | 170,000,000.0 |  |  |  |  |
Senior Note Due 2023 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt retirement costs |  | 3,200,000 |  |  |  |  |
Write off of Deferred Debt Issuance Cost |  | 1,200,000 |  |  |  |  |
Debt Extinguishment costs, Premium on Bonds |  | 2,100,000 |  |  |  |  |
Revolving Credit Facility [Member] | Allied Bank Limited [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Outstanding stand by letters of credit |  | $ 3,600,000 |  |  |  |  |
Loan Lending Commitment Arrangement Fees [Member] | Allied Bank Limited [Member] | Minimum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate spread |  | 25.00% |  |  |  |  |
Loan Lending Commitment Arrangement Fees [Member] | Allied Bank Limited [Member] | Maximum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate spread |  | 37.50% |  |  |  |  |
Term Loan [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate |  | 3.30% |  |  |  |  |
Term Loan [Member] | Allied Bank Limited [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Debt |  | $ 127,400,000 | 294,900,000 |  |  |  |
Unamortized Debt Issuance Expense |  | (1,900,000) | (5,100,000) |  |  |  |
Line of Credit Facility, Fair Value of Amount Outstanding |  | 129,600,000 | 300,000,000.0 |  |  |  |
Long-term Line of Credit |  | 300,000,000 |  |  |  |  |
Long-term Debt, Gross |  | 129,300,000 | 300,000,000.0 |  |  |  |
Line of Credit [Member] | Allied Bank Limited [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Line of Credit |  |  |  |  | $ 58,000,000.0 |  |
Senior Note Due 2023 [Member] | Estimate of Fair Value Measurement [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Debt, Fair Value |  | $ 0 | 275,400,000 |  |  |  |
Senior Note Due 2023 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate |  | 0.00% |  |  |  |  |
Long-term Debt |  | $ 0 | 273,500,000 |  |  |  |
Unamortized Debt Issuance Expense |  | 0 | (1,500,000) |  |  |  |
Long-term Debt, Gross |  | 0 | 275,000,000.0 |  |  |  |
Senior Note Due 2025 [Member] | Estimate of Fair Value Measurement [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Debt, Fair Value |  | $ 325,100,000 | 298,700,000 |  |  |  |
Senior Note Due 2025 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate |  | 5.40% |  |  |  |  |
Long-term Debt |  | $ 298,800,000 | 298,500,000 |  |  |  |
Unamortized Debt Issuance Expense |  | (1,200,000) | (1,500,000) |  |  |  |
Debt instrument, principal amount | $ 300,000,000 |  |  |  |  |  |
Debt instrument, interest rate | 5.375% |  |  |  |  |  |
Redemption Price | 100.00% |  |  |  |  |  |
Long-term Debt, Gross |  | 300,000,000.0 | 300,000,000.0 |  |  |  |
Senior Note Due 2025 [Member] | Minimum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument Redemption Notice Term | 30 days |  |  |  |  |  |
Senior Note Due 2025 [Member] | Maximum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument Redemption Notice Term | 60 days |  |  |  |  |  |
Senior Note Due 2028 | Estimate of Fair Value Measurement [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Debt, Fair Value |  | $ 285,300,000 | $ 0 |  |  |  |
Senior Note Due 2028 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate |  | 4.80% |  |  |  |  |
Long-term Debt |  | $ 271,100,000 |  |  |  |  |
Unamortized Debt Issuance Expense |  | (3,900,000) |  |  |  |  |
Debt instrument, principal amount |  |  |  |  |  | $ 275,000,000 |
Debt instrument, interest rate |  |  |  |  |  | 4.75% |
Long-term Debt, Gross |  | $ 275,000,000.0 |  |  |  |  |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + 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)(1) -URI http://asc.fasb.org/extlink&oid=120520924&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(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: 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 4: 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 + 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 Fair value of the amount outstanding under the credit facility. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 + 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 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=120520924&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=120400017&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=120398452&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=120391452&loc=d3e13212-122682 + Details
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- Definition Amount of long-term debt and lease obligation, classified as noncurrent. + 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 + Details
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- Definition Amount of long-term debt and lease obligation, classified as current. + 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 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Amount of long-term debt and lease obligation, including portion classified as current. + References No definition available. + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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