Summary of Significant Accounting Policies (Policies)	9 Months Ended
Sep. 30, 2022
Accounting Policies [Abstract]
Basis of Consolidation	Basis of Consolidation – LSB and its subsidiaries are consolidated in the accompanying condensed consolidated financial statements. LSB is a holding company with no significant operations or assets other than cash, cash equivalents, short-term investments and investments in its subsidiaries. All material intercompany accounts and transactions have been eliminated. Certain prior period amounts reported in our condensed consolidated financial statements and notes thereto have been reclassified to conform to current period presentation, including all share and per share information relating to the stock split in the form of a stock dividend on October 8, 2021.
Nature of Business	Nature of Business – We are engaged in the manufacture and sale of chemical products. The chemical products we primarily manufacture, market and sell are ammonia, fertilizer grade AN (“HDAN”) and UAN for agricultural applications, high purity and commercial grade ammonia, high purity AN, sulfuric acids, concentrated, blended and regular nitric acid, mixed nitrating acids, carbon dioxide and diesel exhaust fluid for industrial applications and industrial grade AN (“LDAN”) and solutions for the mining industry. We manufacture and distribute our products in four facilities; three of which we own and are located in El Dorado, Arkansas (the “El Dorado Facility”); Cherokee, Alabama (the “Cherokee Facility”); and Pryor, Oklahoma (the “Pryor Facility”); and one of which we operate on behalf of Covestro in Baytown, Texas. Sales to customers include farmers, ranchers, fertilizer dealers and distributors primarily in the ranch land and grain production markets in the United States (“U.S.”); industrial users of acids throughout the U.S. and parts of Canada; and explosive manufacturers in the U.S. and parts of Mexico and Canada. These interim results are not necessarily indicative of results for a full year due, in part, to the seasonality of our sales of agricultural products and the timing of performing our major plant maintenance activities. Our selling seasons for agricultural products are primarily during the spring and fall planting seasons, which typically extend from March through June and from September through November.
Use of Estimates	Use of Estimates – The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Stock Repurchase Program	Stock Repurchase Program – During May 2022, our Board authorized a $50 million stock repurchase program. In August 2022, our Board authorized an increase in the size of the stock repurchase program. Under the expanded program, we were authorized to repurchase up to $100 million of our outstanding common stock. During the second quarter of 2022, we repurchased approximately 0.7 million shares at an average cost of approximately $18 per share on the open market. During the third quarter of 2022, we exhausted the remaining repurchase authorization by repurchasing approximately 6.9 million shares at an average cost of approximately $13 per share, including 5.5 million shares that were repurchased at an average cost of approximately $12 per share in connection with a public offering by LSB Funding and SBT Investors, each of which is an affiliate of Eldridge. In October 2022, our Board approved another expansion of the stock repurchase program, authorizing us to repurchase an additional $75 million of our outstanding common stock under the stock repurchase program.
Short-Term Investments	Short-Term Investments - Investments, which consist of U.S. treasury bills with an original maturity up to and less than 52 weeks, are considered short-term investments and are classified as Level 1. These investments are carried at cost which approximated fair value for the period ended September 30, 2022.
Contingencies	Contingencies – Certain conditions may exist which may result in a loss, but which will only be resolved when future events occur. We and our legal counsel assess such contingent liabilities and such assessment inherently involves an exercise of judgment. If the assessment of a contingency indicates that it is probable that a loss has been incurred, we would accrue for such contingent losses when such losses can be reasonably estimated. If the assessment indicates that a potentially material loss contingency is not probable but reasonably possible, or is probable but cannot be estimated, the nature of the contingent liability, together with an estimate of the range of possible loss if determinable and material, would be disclosed. Estimates of potential legal fees and other directly related costs associated with contingencies are not accrued but rather are expensed as incurred. Loss contingency liabilities are included in current and noncurrent accrued and other liabilities and are based on current estimates that may be revised in the near term. In addition, we recognize contingent gains when such gains are realized or when the contingencies have been resolved (generally at the time a settlement has been reached).
Derivatives, Hedges and Financial Instruments	Derivatives, Hedges and Financial Instruments – Derivatives are recognized in the balance sheet and measured at fair value. Changes in fair value of derivatives are recorded in results of operations unless the normal purchase or sale exceptions apply, or hedge accounting is elected. The fair value amounts recognized for our derivative contracts executed with the same counterparty under a master netting arrangement may be offset. We have the choice to offset or not, but that choice must be applied consistently. A master netting arrangement exists if the reporting entity has multiple contracts with a single counterparty that are subject to a contractual agreement that provides for the net settlement of all contracts through a single payment in a single currency in the event of default on or termination of any one contract. Offsetting the fair values recognized for the derivative contracts outstanding with a single counterparty results in the net fair value of the transactions reported as an asset or a liability in the balance sheet. When applicable, we present the fair values of our derivative contracts under master netting agreements using a gross fair value presentation. Assets and liabilities measured at fair value are classified using the following hierarchy, which is based upon the transparency of inputs to the valuation as of the measurement date: Level 1 - Valuations of contracts classified as Level 1 are based on quoted prices in active markets for identical contracts. Level 2 - Valuations of contracts classified as Level 2 are based on quoted prices for similar contracts and valuation inputs other than quoted prices that are observable for these contracts. Level 3 - Valuations of assets and liabilities classified as Level 3 are based on prices or valuation techniques that require inputs that are both unobservable and significant to the overall fair value measurement.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements Changes to U.S. GAAP are established by the FASB in the form of accounting standards updates (“ASUs”) to the FASB’s Accounting Standards Codification. We consider the applicability and impact of all ASUs. ASUs issued and outstanding or that became effective since January 1, 2022 through the date of these financial statements were assessed and determined not to be applicable or are expected to have minimal impact on our condensed consolidated financial position and results of operations.

Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2022

Basis of Consolidation – LSB and its subsidiaries are consolidated in the accompanying condensed consolidated financial statements. LSB is a holding company with no significant operations or assets other than cash, cash equivalents, short-term investments and investments in its subsidiaries. All material intercompany accounts and transactions have been eliminated. Certain prior period amounts reported in our condensed consolidated financial statements and notes thereto have been reclassified to conform to current period presentation, including all share and per share information relating to the stock split in the form of a stock dividend on October 8, 2021.

Nature of Business

Nature of Business – We are engaged in the manufacture and sale of chemical products. The chemical products we primarily manufacture, market and sell are ammonia, fertilizer grade AN (“HDAN”) and UAN for agricultural applications, high purity and commercial grade ammonia, high purity AN, sulfuric acids, concentrated, blended and regular nitric acid, mixed nitrating acids, carbon dioxide and diesel exhaust fluid for industrial applications and industrial grade AN (“LDAN”) and solutions for the mining industry. We manufacture and distribute our products in four facilities; three of which we own and are located in El Dorado, Arkansas (the “El Dorado Facility”); Cherokee, Alabama (the “Cherokee Facility”); and Pryor, Oklahoma (the “Pryor Facility”); and one of which we operate on behalf of Covestro in Baytown, Texas.

Sales to customers include farmers, ranchers, fertilizer dealers and distributors primarily in the ranch land and grain production markets in the United States (“U.S.”); industrial users of acids throughout the U.S. and parts of Canada; and explosive manufacturers in the U.S. and parts of Mexico and Canada.

These interim results are not necessarily indicative of results for a full year due, in part, to the seasonality of our sales of agricultural products and the timing of performing our major plant maintenance activities. Our selling seasons for agricultural products are primarily during the spring and fall planting seasons, which typically extend from March through June and from September through November.

Use of Estimates

Use of Estimates – The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Stock Repurchase Program

Stock Repurchase Program – During May 2022, our Board authorized a $50 million stock repurchase program. In August 2022, our Board authorized an increase in the size of the stock repurchase program. Under the expanded program, we were authorized to repurchase up to $100 million of our outstanding common stock. During the second quarter of 2022, we repurchased approximately 0.7 million shares at an average cost of approximately $18 per share on the open market. During the third quarter of 2022, we exhausted the remaining repurchase authorization by repurchasing approximately 6.9 million shares at an average cost of approximately $13 per share, including 5.5 million shares that were repurchased at an average cost of approximately $12 per share in connection with a public offering by LSB Funding and SBT Investors, each of which is an affiliate of Eldridge. In October 2022, our Board approved another expansion of the stock repurchase program, authorizing us to repurchase an additional $75 million of our outstanding common stock under the stock repurchase program.

Short-Term Investments

Short-Term Investments - Investments, which consist of U.S. treasury bills with an original maturity up to and less than 52 weeks, are considered short-term investments and are classified as Level 1. These investments are carried at cost which approximated fair value for the period ended September 30, 2022.

Contingencies

Contingencies – Certain conditions may exist which may result in a loss, but which will only be resolved when future events occur. We and our legal counsel assess such contingent liabilities and such assessment inherently involves an exercise of judgment. If the assessment of a contingency indicates that it is probable that a loss has been incurred, we would accrue for such contingent losses when such losses can be reasonably estimated. If the assessment indicates that a potentially material loss contingency is not probable but reasonably possible, or is probable but cannot be estimated, the nature of the contingent liability, together with an estimate of the range of possible loss if determinable and material, would be disclosed. Estimates of potential legal fees and other directly related costs associated with contingencies are not accrued but rather are expensed as incurred. Loss contingency liabilities are included in current and noncurrent accrued and other liabilities and are based on current estimates that may be revised in the near term. In addition, we recognize contingent gains when such gains are realized or when the contingencies have been resolved (generally at the time a settlement has been reached).

Derivatives, Hedges and Financial Instruments

Derivatives, Hedges and Financial Instruments – Derivatives are recognized in the balance sheet and measured at fair value. Changes in fair value of derivatives are recorded in results of operations unless the normal purchase or sale exceptions apply, or hedge accounting is elected.

The fair value amounts recognized for our derivative contracts executed with the same counterparty under a master netting arrangement may be offset. We have the choice to offset or not, but that choice must be applied consistently. A master netting arrangement exists if the reporting entity has multiple contracts with a single counterparty that are subject to a contractual agreement that provides for the net settlement of all contracts through a single payment in a single currency in the event of default on or termination of any one contract. Offsetting the fair values recognized for the derivative contracts outstanding with a single counterparty results in the net fair value of the transactions reported as an asset or a liability in the balance sheet. When applicable, we present the fair values of our derivative contracts under master netting agreements using a gross fair value presentation.

Assets and liabilities measured at fair value are classified using the following hierarchy, which is based upon the transparency of inputs to the valuation as of the measurement date:

Level 1 - Valuations of contracts classified as Level 1 are based on quoted prices in active markets for identical contracts.

Level 2 - Valuations of contracts classified as Level 2 are based on quoted prices for similar contracts and valuation inputs other than quoted prices that are observable for these contracts.

Level 3 - Valuations of assets and liabilities classified as Level 3 are based on prices or valuation techniques that require inputs that are both unobservable and significant to the overall fair value measurement.

Recently Issued Accounting Pronouncements

Changes to U.S. GAAP are established by the FASB in the form of accounting standards updates (“ASUs”) to the FASB’s Accounting Standards Codification. We consider the applicability and impact of all ASUs. ASUs issued and outstanding or that became effective since January 1, 2022 through the date of these financial statements were assessed and determined not to be applicable or are expected to have minimal impact on our condensed consolidated financial position and results of operations.