East Dubuque Nitrogen Partners (RNF) 10-Q 11 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015	Apr. 30, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Trading Symbol	RNF
Entity Registrant Name	Rentech Nitrogen Partners, L.P.
Entity Central Index Key	1525998
Current Fiscal Year End Date	-19
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		38,913,396

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Current assets
Cash	$32,406	$28,028
Accounts receivable	15,868	16,714
Inventories	39,851	27,736
Prepaid expenses and other current assets	7,830	4,942
Other receivables	263	357
Total current assets	96,218	77,777
Property, plant and equipment, net	292,020	259,011
Construction in progress	14,997	47,758
Other assets
Intangible assets	20,818	21,114
Debt issuance costs	7,968	8,315
Other assets	181	341
Total other assets	28,967	29,770
Total assets	432,202	414,316
Current liabilities
Accounts payable	9,226	14,846
Payable to general partner	3,695	3,035
Accrued liabilities	11,889	14,203
Deferred revenue	45,176	26,700
Accrued interest	9,726	4,494
Total current liabilities	79,712	63,278
Long-term liabilities
Debt	339,000	335,000
Asset retirement obligation	4,269	4,194
Other	2,785	2,953
Total long-term liabilities	346,054	342,147
Total liabilities	425,766	405,425
Commitments and contingencies (Note 8)
Partners' Capital
Common unitholders -38,913 units issued and outstanding at March 31, 2015 and December 31, 2014, respectively	6,427	8,886
Accumulated other comprehensive income	9	5
General partner's interest	0	0
Total partners' capital	6,436	8,891
Total liabilities and partners' capital	$432,202	$414,316

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Statement of Financial Position [Abstract]
Common unitholders, units issued	38,913	38,913
Common unitholders, units outstanding	38,913	38,913

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Income Statement [Abstract]
Revenues	$69,174	$56,280
Cost of sales	50,391	42,516
Gross profit	18,783	13,764
Operating expenses
Selling, general and administrative expense	4,336	5,278
Depreciation and amortization	429	333
Other income	-4	-6
Total operating expenses	4,761	5,605
Operating income	14,022	8,159
Other expenses, net
Interest expense	-5,028	-5,004
Other expense, net	-3
Total other expenses, net	-5,031	-5,004
Income before income taxes	8,991	3,155
Income tax expense	38	30
Net income	$8,953	$3,125
Net income per common unit allocated to common unitholders - Basic	$0.23	$0.08
Net income per common unit allocated to common unitholders - Diluted	$0.23	$0.08
Weighted-average units used to compute net income per common unit:
Basic	38,913	38,889
Diluted	38,927	38,936

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$8,953	$3,125
Other comprehensive income (loss), net of tax:
Pension and postretirement plan adjustments	4	-12
Other comprehensive income (loss)	4	-12
Comprehensive income	$8,957	$3,113

Consolidated_Statements_of_Par

Consolidated Statements of Partners' Capital (USD $)	Total	Common Stock [Member]	Accumulated Other Comprehensive Income [Member]	Affiliated Entity [Member]	Affiliated Entity [Member]	Non-Affiliated Entity [Member]	Non-Affiliated Entity [Member]
In Thousands					Common Stock [Member]		Common Stock [Member]
Beginning Balance at Dec. 31, 2014	$8,891	$8,886	$5
Beginning Balance, Units at Dec. 31, 2014		38,913
Distributions to common unitholders	-11,738			-6,975	-6,975	-4,763	-4,763
Unit-based compensation expense	326	326
Net income	8,953	8,953
Other comprehensive income	4		4
Ending Balance at Mar. 31, 2015	$6,436	$6,427	$9
Ending Balance, Units at Mar. 31, 2015		38,913

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities
Net income	$8,953	$3,125
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	5,143	3,304
Utilization of spare parts	1,098	2,084
Non-cash interest expense	305	260
Unit-based compensation	326	496
Unrealized gain on gas derivatives	-2,580
Other	75	-7
Changes in operating assets and liabilities:
Accounts receivable	847	-9,743
Inventories	-10,510	-17,877
Prepaid expenses and other current assets	-2,469	1,028
Other receivables	93	739
Other assets	-238	-695
Accounts payable	-4,788	8,790
Accrued liabilities, accrued payroll and other	2,756	-2,677
Deferred revenue	18,475	29,074
Accrued interest	4,989	5,156
Net cash provided by operating activities	22,475	23,057
Cash flows from investing activities
Capital expenditures	-10,363	-17,322
Other items	4	-563
Net cash used in investing activities	-10,359	-17,885
Cash flows from financing activities
Proceeds from credit facilities	4,000
Net cash used in financing activities	-7,738	-1,954
Increase in cash	4,378	3,218
Cash, beginning of period	28,028	34,060
Cash, end of period	32,406	37,278
Non-cash financing and investing activities:
Purchase of property, plant, equipment and construction in progress in accounts payable and accrued liabilities	3,134	5,441
Affiliates [Member]
Cash flows from financing activities
Distribution to common unitholders	-6,975	-1,162
Non Affiliates [Member]
Cash flows from financing activities
Distribution to common unitholders	($4,763)	($792)

Basis_of_Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Basis of Presentation	Note 1 — Basis of Presentation
	The accompanying unaudited consolidated financial statements of Rentech Nitrogen Partners, L.P. (the “Partnership”) and its consolidated subsidiaries have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and in compliance with the instructions to Form 10-Q and Article 10 of Regulation S-X. Neither authority requires all of the information and footnotes required by GAAP for complete financial statements. Accordingly, the accompanying financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, the unaudited consolidated financial statements reflect all adjustments, consisting only of normal recurring adjustments, considered necessary for a fair statement of the Partnership’s financial position as of March 31, 2015, and the results of operations and cash flows for the periods presented. The accompanying consolidated financial statements include the accounts of the Partnership and its wholly owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. Operating results for the three months ended March 31, 2015 are not necessarily indicative of the results that may be expected for the year ending December 31, 2015 or any other reporting period. The information included in this Form 10-Q should be read in conjunction with the consolidated financial statements and notes thereto included in the Partnership’s Annual Report on Form 10-K for the year ended December 31, 2014 filed with the Securities and Exchange Commission (the “SEC”) on March 16, 2015 (the “Annual Report”).
	The Partnership’s assets consist primarily of all of the equity interests, directly or indirectly held by it, of Rentech Nitrogen, LLC (“RNLLC”), which owns a fertilizer facility in East Dubuque, Illinois (the “East Dubuque Facility”), and Rentech Nitrogen Pasadena, LLC (“RNPLLC”), which owns a fertilizer facility in Pasadena, Texas (the “Pasadena Facility”).
	The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities as of the date of the consolidated financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Recent_Accounting_Pronouncemen

Recent Accounting Pronouncements	3 Months Ended
	Mar. 31, 2015
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	Note 2 — Recent Accounting Pronouncements
	In May 2014, the Financial Accounting Standards Board (the “FASB”) issued guidance that will significantly enhance comparability of revenue recognition practices across entities, industries, jurisdictions, and capital markets. In April 2015, FASB proposed a one-year deferral of the effective date to annual reporting periods beginning on or after December 15, 2017. In addition, the FASB proposal would include an option to early adopt the guidance for annual periods beginning on or after December 15, 2016. The Partnership is evaluating the provisions of this guidance and the potential impact, if any, on its consolidated financial position, results of operations and disclosures.
	In June 2014, the FASB issued guidance on accounting for share-based payments when the terms of an award provide that a performance target could be achieved after the requisite service period. This guidance is effective for fiscal years, and interim periods within those years, beginning after December 15, 2015. The Partnership is evaluating the provisions of this guidance and the potential impact, if any, on its consolidated financial position, results of operations and disclosures.
	In August 2014, the FASB issued guidance on presentation of financial statements – going concern, which applies to all companies. It requires management to evaluate whether there are conditions or events, considered in the aggregate, that raise substantial doubt about the entity’s ability to continue as a going concern within one year after the date that the financial statements are issued. This guidance is effective for the annual period ending after December 15, 2016, and for annual periods and interim periods thereafter. The Partnership is evaluating the provisions of this guidance and the potential impact, if any, on its consolidated financial position, results of operations and disclosures.
	In January 2015, the FASB issued guidance that eliminates the concept of extraordinary items. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. The Partnership is evaluating the provisions of this guidance and the potential impact, if any, on its consolidated financial position, results of operations and disclosures.
	In April 2015, the FASB issued guidance, which would require that debt issuance costs be presented in the balance sheet as a direct deduction from the carrying amount of debt liability, consistent with debt discounts or premiums. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. The Partnership is evaluating the provisions of this guidance and the potential impact, if any, on its consolidated financial position, results of operations and disclosures.
	In April 2015, the FASB issued guidance that will help entities evaluate the accounting for fees paid by a customer in a cloud computing arrangement. If a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. This guidance is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2015. The Partnership is evaluating the provisions of this guidance and the potential impact, if any, on its consolidated financial position, results of operations and disclosures.

Fair_Value

Fair Value	3 Months Ended
	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value	Note 3 — Fair Value
	Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants and is classified in one of the following three categories:
		•		Level 1 — Consists of unadjusted quoted prices in active markets for identical assets or liabilities that the Partnership has the ability to access as of the reporting date.
		•		Level 2 — Consists of inputs other than quoted prices included within Level 1 that are directly observable for the asset or liability or indirectly observable through corroboration with observable market data.
		•		Level 3 — Consists of unobservable inputs for assets or liabilities whose fair value is estimated based on internally developed models or methodologies using inputs that are generally less readily observable and supported by little, if any, market activity at the measurement date. Unobservable inputs are developed based on the best available information and subject to cost-benefit constraints.
	Fair values of cash, receivables, deposits, other current assets, accounts payable, accrued liabilities and other current liabilities were assumed to approximate carrying value since they are short term and can be settled on demand.
	The following table presents the fair value and carrying value of the Partnership’s borrowings as of March 31, 2015.
			Fair Value						Carrying Value
			(in thousands)
			Level 1		Level 2		Level 3
	Liabilities
	Notes		$	311,002	$	—	$	—	$	320,000
	GE Credit Agreement			—		19,000		—		19,000
	The following table presents the fair value and carrying value of the Partnership’s borrowings as of December 31, 2014.
			Fair Value						Carrying Value
			(in thousands)
			Level 1		Level 2		Level 3
	Liabilities
	Notes		$	310,202	$	—	$	—	$	320,000
	GE Credit Agreement			—		15,000		—		15,000
	Notes
	The $320.0 million of 6.5% second lien senior secured notes due 2021 (the “Notes”) are deemed to be Level 1 financial instruments because there was an active market for such debt. The fair value of such debt was determined based on market prices.
	GE Credit Agreement
	The credit agreement with General Electric Capital Corporation (the “GE Credit Agreement”) is deemed to be a Level 2 financial instrument because the measurement is based on observable market data. It is concluded that the carrying value of the GE Credit Agreement approximates the fair value of such loan as of March 31, 2015 and December 31, 2014 based on its floating interest rate and the Company’s assessment that the fixed-rate margin is still at market.
	The levels within the fair value hierarchy at which the Partnership’s financial instruments have been evaluated have not changed for any of the Partnership’s financial instruments during the three months ended March 31, 2015 and 2014.

Derivative_Instruments

Derivative Instruments	3 Months Ended
	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Note 4 — Derivative Instruments
	Accounting guidance establishes accounting and reporting requirements for derivative instruments and hedging activities. This guidance requires recognition of all derivative instruments as assets or liabilities on the Partnership’s consolidated balance sheets and measurement of those instruments at fair value. The accounting treatment of changes in fair value is dependent upon whether or not a derivative instrument is designated as a hedge and if so, the type of hedge. The Partnership currently does not designate any of its derivatives as hedges for financial accounting purposes. Gains and losses on derivative instruments not designated as hedges are currently included in earnings and reported under cash flows from operating activities.
	Forward Natural Gas Contracts
	The Partnership uses commodity-based derivatives to minimize its exposure to the fluctuations in natural gas prices. The Partnership recognizes the unrealized gains or losses related to the commodity-based derivative instruments in its consolidated financial statements. The Partnership does not have any master netting agreements or collateral relating to these derivatives.
	Our East Dubuque Facility enters into forward natural gas purchase contracts to reduce its exposure to the fluctuations in natural gas prices. The forward natural gas contracts are deemed to be Level 2 financial instruments because the measurement is based on observable market data. The fair value of such contracts had been determined based on market prices. Gain or loss associated with forward natural gas contracts is recorded in cost of sales on the consolidated statements of operations. The amount of unrealized gain recorded was $2.6 million for the three months ended March 31, 2015. There was no unrealized gain or loss for the three months ended March 31, 2014. These forward natural gas contracts are recorded in accrued liabilities on the consolidated balance sheets.
		As of
		March 31,			December 31,
		2015			2014
		(in thousands)
	Forward natural gas contracts recorded in current liabilities:
	Gross amounts recognized	$	1,382		$	3,955
	Gross amounts offset in consolidated balance sheets		(7	)		—
	Net amounts presented in the consolidated balance sheets	$	1,375		$	3,955
	The following table presents the financial instruments that were accounted for at fair value by level as of March 31, 2015 and December 31, 2014.
		Level 1			Level 2		Level 3
		(in thousands)
	Liabilities
	Forward gas contracts – March 31, 2015	$	—		$	1,375	$	—
	Forward gas contracts – December 31, 2014	$	—		$	3,955	$	—

Inventories

Inventories	3 Months Ended
	Mar. 31, 2015
Inventory Disclosure [Abstract]
Inventories	Note 5 — Inventories
	Inventories consisted of the following:
		As of
		March 31,		December 31,
		2015		2014
		(in thousands)
	Finished goods	$	36,868	$	24,097
	Raw materials		2,788		3,493
	Other		195		146
	Total inventory	$	39,851	$	27,736

Property_Plant_and_Equipment

Property, Plant and Equipment	3 Months Ended
	Mar. 31, 2015
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Note 6 — Property, Plant and Equipment
	Property, plant and equipment consisted of the following:
		As of
		March 31,			December 31,
		2015			2014
		(in thousands)
	Land and land improvements	$	23,184		$	23,184
	Buildings and building improvements		29,751			29,747
	Machinery and equipment		328,336			290,140
	Furniture, fixtures and office equipment		383			316
	Computer equipment and computer software		4,488			3,312
	Vehicles		186			186
	Other		1,475			1,476
			387,803			348,361
	Less: Accumulated depreciation		(95,783	)		(89,350	)
	Total property, plant and equipment, net	$	292,020		$	259,011
	The construction in progress balance at March 31, 2015 was $15.0 million, which includes $0.4 million of capitalized interest costs. The construction in progress balance represents primarily the costs associated with the nitric acid expansion project and the ammonia synthesis converter project. The construction in progress balance at December 31, 2014 was $47.8 million, which includes $1.7 million of capitalized interest costs. The construction in progress balance represents primarily the costs associated with the power generation project.

Debt

Debt	3 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Debt	Note 7 — Debt
	The Partnership’s debt obligations at March 31, 2015 consist of $320.0 million of Notes and $19.0 million in outstanding advances under the GE Credit Agreement. The Partnership’s debt obligations at December 31, 2014 consist of $320.0 million of Notes and $15.0 million in outstanding advances under the GE Credit Agreement. Debt premium, discount and issuance expenses incurred in connection with financing are deferred and amortized on a straight-line basis.
	As of March 31, 2015, the Partnership was in compliance with its covenants under the Notes and the GE Credit Agreement.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 8 — Commitments and Contingencies
	Natural Gas Forward Purchase Contracts
	The Partnership’s policy and practice are to enter into fixed-price forward purchase contracts for natural gas in conjunction with contracted nitrogen fertilizer product sales in order to substantially fix gross margin on those product sales contracts. The Partnership may also enter into a limited amount of additional fixed-price forward purchase contracts for natural gas in order to reduce monthly and seasonal gas price volatility. The Partnership occasionally enters into index-price contracts for the purchase of natural gas. The Partnership has entered into multiple natural gas forward purchase contracts for various delivery dates through December 31, 2015. Commitments for natural gas purchases consist of the following:
		As of
		March 31,		December 31,
		2015		2014
		(in thousands, except weighted
		average rate)
	MMBtus under fixed-price contracts		3,505		3,188
	MMBtus under index-price contracts		—		540
	Total MMBtus under contracts		3,505		3,728
	Commitments to purchase natural gas	$	10,508	$	15,568
	Weighted average rate per MMBtu based on the fixed rates and the indexes applicable to each contract	$	3	$	4.18
	As of March 31, 2015, deposits against these forward gas contracts were $0.7 million. During April 2015, the Partnership entered into additional fixed-quantity forward purchase contracts at fixed and indexed prices for various delivery dates through December 31, 2015. The total MMBtus associated with these additional forward purchase contracts are 1.6 million and the total amount of the purchase commitments is $4.1 million, resulting in a weighted average rate per MMBtu of $2.66 in these new commitments. The Partnership is required to make additional prepayments under these forward purchase contracts in the event that market prices fall below the purchase prices in the contracts.
	Litigation
	The Partnership is party to litigation from time to time in the normal course of business. The Partnership accrues liabilities related to litigation only when it concludes that it is probable that it will incur costs related to such litigation, and can reasonably estimate the amount of such costs. In cases where the Partnership determines that it is not probable, but reasonably possible that it has a material obligation, it discloses such obligations and the possible loss or range of loss, if such estimate can be made. The outcome of the Partnership’s current material litigation matters is not estimable or probable. The Partnership maintains insurance to cover certain actions and believes that resolution of its current litigation matters will not have a material adverse effect on the Partnership’s financial statements.
	Regulation
	The Partnership’s business is subject to extensive and frequently changing federal, state and local, environmental, health and safety regulations governing a wide range of matters, including the emission of air pollutants, the release of hazardous substances into the environment, the treatment and discharge of waste water and the storage, handling, use and transportation of the Partnership’s fertilizer products, raw materials, and other substances that are part of our operations. These laws include the Clean Air Act (the “CAA”), the federal Water Pollution Control Act, the Resource Conservation and Recovery Act, the Comprehensive Environmental Response, Compensation and Liability Act, the Toxic Substances Control Act, and various other federal, state and local laws and regulations. The laws and regulations to which the Partnership is subject are complex, change frequently and have tended to become more stringent over time. The ultimate impact on the Partnership’s business of complying with existing laws and regulations is not always clearly known or determinable due in part to the fact that the Partnership’s operations may change over time and certain implementing regulations for laws, such as the CAA, have not yet been finalized, are under governmental or judicial review or are being revised. These laws and regulations could result in increased capital, operating and compliance costs.
	The Partnership entered into a settlement agreement with the Illinois Environmental Protection Agency in August 2013 requiring it to connect a device at the East Dubuque Facility to an ammonia safety flare by December 1, 2015. The Partnership estimates the cost of the project required by the settlement agreement as being $0.4 million.
	The Partnership negotiated a settlement agreement with Region 6 of the Environmental Protection Agency relating to an ammonia release that occurred at the Pasadena Facility on April 20, 2014. The penalty required by the settlement agreement was $0.1 million.
	Loss Contingencies
	Abener Teyma General Partnership (“Abeinsa”), the engineering, procurement and construction (“EPC”) contractor for the power generation facility at the Pasadena Facility, recently submitted to RNPLLC approximately $10.0 million of change orders for approval and payment. Under the terms of the EPC contract between RNPLLC and Abeinsa (the “EPC Contract”), RNPLLC must agree to any change order for it to be effective. RNPLLC has contested the validity of these change orders and presented its own change orders, and claims for damages under the EPC Contract to Abeinsa. The parties are involved in the contractual dispute resolution process as to how to resolve the disputed change orders and other outstanding claims related to the construction of the power generation facility. The Company is unable at this time to estimate any potential liability from this contingency.

Partners_Capital_and_Partnersh

Partners' Capital and Partnership Distributions	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Partners' Capital and Partnership Distributions	Note 9 — Partners’ Capital and Partnership Distributions
	The Partnership’s policy is to distribute to its unitholders all of the cash available for distribution that it generates each quarter, subject to a determination by the board of directors (the “Board”) of the Partnership’s general partner (the “General Partner”) that the Partnership’s projected liquidity is adequate to provide for its forecasted operating and working capital needs. Cash available for distribution for each quarter will be determined by the Board of the General Partner following the end of each quarter. The Partnership expects that cash available for distribution for each quarter will generally be calculated as the cash it generates during the quarter, less cash needed for maintenance capital expenditures not funded by capital proceeds, debt service and other contractual obligations, and any increases in cash reserves for future operating or capital needs that the Board of the General Partner deems necessary or appropriate. Increases or decreases in such reserves may be determined at any time by the Board of the General Partner as it considers, among other things, the cash flows or cash needs expected in approaching periods. The Partnership does not intend to maintain excess distribution coverage for the purpose of maintaining stability or growth in its quarterly distribution, nor does it intend to incur debt to pay quarterly distributions. The Partnership has no legal obligation to pay distributions. Distributions are not required by the Partnership’s partnership agreement and the Partnership’s distribution policy is subject to change at any time at the discretion of the Board of the General Partner. Any distributions made by the Partnership to its unitholders will be done on a pro rata basis.
	At March 31, 2015, the Partnership had outstanding 212,691 unit-settled phantom units. Each phantom unit entitles the holder to payments in amounts equal to the amounts of any distributions made to an outstanding unit by the Partnership. Payments to outstanding phantom units are not subtracted from operating cash flow in the calculation of cash available for distribution, but the payments made to phantom unitholders are recorded as distributions for accounting purposes. For information on the announcement of cash distributions refer to “Note 14 — Subsequent Events — Distributions”.
	The following is a summary of cash distributions paid to common unitholders and holders of phantom units during the three months ended March 31, 2015 related to the fourth quarter of 2014:
		December 31,		Total Cash
		2014		Distributions
				Paid in 2015
		(in thousands, except for per unit
		amounts)
	Distribution to common unitholders — affiliates	$	6,975	$	6,975
	Distribution to common unitholders — non-affiliates		4,763		4,763
	Total amount paid	$	11,738	$	11,738
	Per common unit	$	0.3	$	0.3
	Common and phantom units outstanding		39,127

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Note 10 — Income Taxes
	The Partnership and its subsidiaries are not directly subject to federal and state income taxes. Instead, their taxable income or loss is allocated to their individual partners or members. However, the Partnership and its subsidiaries are subject to an Illinois replacement tax, Texas margin tax and California annual minimum franchise tax. For the three months ended March 31, 2015, Illinois replacement tax and Texas margin tax of approximately $14,000 and $23,000, respectively, were recorded. For the three months ended March 31, 2014, Illinois replacement tax and Texas margin tax of approximately $3,000 and $27,000, respectively, were recorded.

Segment_Information

Segment Information	3 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Segment Information	Note 11 — Segment Information
	The Partnership operates in two business segments, as described below:
		•		East Dubuque – The operations of the East Dubuque Facility, which produces primarily ammonia and urea ammonium nitrate solution (“UAN”).
		•		Pasadena – The operations of the Pasadena Facility, which produces primarily ammonium sulfate.
	The Partnership’s reportable operating segments have been determined in accordance with the Partnership’s internal management structure, which is organized based on operating activities. The Partnership evaluates performance based upon several factors, of which the primary financial measure is segment-operating income (loss).
			For the Three Months Ended
			March 31,
			2015			2014
			(in thousands)
	Revenues
	East Dubuque		$	36,752		$	28,491
	Pasadena			32,422			27,789
	Total revenues		$	69,174		$	56,280
	Gross profit
	East Dubuque		$	17,441		$	12,398
	Pasadena			1,342			1,366
	Total gross profit		$	18,783		$	13,764
	Selling, general and administrative expenses
	East Dubuque		$	1,346		$	1,133
	Pasadena			796			1,829
	Total segment selling, general and administrative expenses		$	2,142		$	2,962
	Depreciation and amortization
			For the Three Months Ended
			March 31,
			2015			2014
			(in thousands)
	East Dubuque		$	69		$	37
	Pasadena			360			296
	Total segment depreciation and amortization recorded in operating expenses			429			333
	East Dubuque			3,239		$	2,205
	Pasadena			1,475			766
	Total depreciation and amortization recorded in cost of sales			4,714			2,971
	Total segment depreciation and amortization		$	5,143		$	3,304
	Other operating income
	East Dubuque		$	(4	)	$	(6	)
	Pasadena			—			—
	Total segment other operating income		$	(4	)	$	(6	)
	Operating income (loss)
	East Dubuque		$	16,030		$	11,234
	Pasadena			186			(759	)
	Total segment operating income		$	16,216		$	10,475
	Interest expense
	East Dubuque		$	19		$	22
	Pasadena			—			—
	Total segment interest expense		$	19		$	22
	Net income (loss)
	East Dubuque		$	16,022		$	11,209
	Pasadena			163			(786	)
	Total segment net income		$	16,185		$	10,423
	Reconciliation of segment net income to consolidated net income:
	Segment net income		$	16,185		$	10,423
	Partnership and unallocated expenses recorded as selling, general and administrative expenses			(2,194	)		(2,316	)
	Partnership and unallocated expenses recorded as other expense			(29	)		—
	Unallocated interest expense and loss on interest rate swaps			(5,009	)		(4,982	)
	Consolidated net income		$	8,953		$	3,125
			As of			As of
			March 31,			December 31,
			2015			2014
			(in thousands)
	Total assets
	East Dubuque		$	194,591		$	186,508
	Pasadena			197,104			193,737
	Total segment assets		$	391,695		$	380,245
	Reconciliation of segment total assets to consolidated total assets:
Segment total assets		$	391,695		$	380,245
Partnership and other			40,507			34,071
Consolidated total assets		$	432,202		$	414,316
		For the Three Months Ended March 31,
		2015			2014
		(in thousands)
Capital expenditures
East Dubuque		$	6,973		$	5,677
Pasadena			3,390			11,645
Partnership and other			—			—
Total capital expenditures		$	10,363		$	17,322

Net_Income_Per_Common_Unit

Net Income Per Common Unit	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Net Income Per Common Unit	Note 12 — Net Income Per Common Unit
	The Partnership’s net income is allocated wholly to the common unitholders since the General Partner has a non-economic interest.
	Basic income per common unit allocated to common unitholders is calculated by dividing net income allocated to common unitholders by the weighted average number of common units outstanding for the period. Diluted net income per common unit allocated to common unitholders is calculated by dividing net income allocated to common unitholders by the weighted average number of common units outstanding plus the dilutive effect, calculated using the “treasury stock” method for the unvested phantom units. Phantom units are settled for common units upon vesting and are issued in tandem with distribution rights during the vesting period.
	The following table sets forth the computation of basic and diluted net income per common unit:
		For the Three Months Ended
		March 31,
		2015		2014
		(in thousands, except for per
		unit data)
	Numerator:
	Net income	$	8,953	$	3,125
	Less: Income allocated to unvested units		64		15
	Net income allocated to common unitholders	$	8,889	$	3,110
	Denominator:
	Weighted average common units outstanding		38,913		38,889
	Effect of dilutive units:
	Phantom units		14		47
	Diluted units outstanding		38,927		38,936
	Basic net income per common unit	$	0.23	$	0.08
	Diluted net income per common unit	$	0.23	$	0.08
	For the three months ended March 31, 2015 and 2014, 133,000 and no phantom units, respectively, were excluded from the calculation of diluted net income per common unit because their inclusion would have been anti-dilutive.

Related_Parties

Related Parties	3 Months Ended
	Mar. 31, 2015
Related Party Transactions [Abstract]
Related Parties	Note 13 — Related Parties
	The Partnership, the General Partner and Rentech, Inc. (“Rentech”) have entered into a services agreement, pursuant to which the Partnership and the General Partner obtain certain management and other services from Rentech. Under the services agreement, the Partnership, its subsidiaries and the General Partner are obligated to reimburse Rentech for (i) all costs, excluding share-based compensation, incurred by Rentech or its affiliates in connection with the employment of its employees who are seconded to the Partnership and who provide the Partnership services under the agreement on a full-time basis; (ii) a prorated share of costs, excluding share-based compensation, incurred by Rentech or its affiliates in connection with the employment of its employees, excluding seconded personnel, who provide the Partnership services under the agreement on a part-time basis, with such prorated share determined by Rentech on a commercially reasonable basis, based on the estimated percent of total working time that such personnel are engaged in performing services for the Partnership; (iii) a prorated share of certain administrative costs, in accordance with the agreement, including office costs, services by outside vendors, other general and administrative costs; and (iv) any taxes (other than income taxes, gross receipt taxes and similar taxes) incurred by Rentech or its affiliates for the services provided under the agreement. In accordance with the services agreement, Rentech billed the Partnership $1.9 million for the three months ended March 31, 2015, and $2.6 million for the same period in the prior year.

Subsequent_Events

Subsequent Events	3 Months Ended
	Mar. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	Note 14 — Subsequent Events
	Distributions
	On May 11, 2015, the Partnership announced a cash distribution to its common unitholders for the first quarter of 2015 of $0.36 per unit, which will result in total distributions in the amount of $14.1 million, including payments to phantom unitholders. The cash distribution will be paid on May 29, 2015 to unitholders of record at the close of business on May 22, 2015.

Recent_Accounting_Pronouncemen1

Recent Accounting Pronouncements (Policies)	3 Months Ended
	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Recent Accounting Pronouncements	In May 2014, the Financial Accounting Standards Board (the “FASB”) issued guidance that will significantly enhance comparability of revenue recognition practices across entities, industries, jurisdictions, and capital markets. In April 2015, FASB proposed a one-year deferral of the effective date to annual reporting periods beginning on or after December 15, 2017. In addition, the FASB proposal would include an option to early adopt the guidance for annual periods beginning on or after December 15, 2016. The Partnership is evaluating the provisions of this guidance and the potential impact, if any, on its consolidated financial position, results of operations and disclosures.
	In June 2014, the FASB issued guidance on accounting for share-based payments when the terms of an award provide that a performance target could be achieved after the requisite service period. This guidance is effective for fiscal years, and interim periods within those years, beginning after December 15, 2015. The Partnership is evaluating the provisions of this guidance and the potential impact, if any, on its consolidated financial position, results of operations and disclosures.
	In August 2014, the FASB issued guidance on presentation of financial statements – going concern, which applies to all companies. It requires management to evaluate whether there are conditions or events, considered in the aggregate, that raise substantial doubt about the entity’s ability to continue as a going concern within one year after the date that the financial statements are issued. This guidance is effective for the annual period ending after December 15, 2016, and for annual periods and interim periods thereafter. The Partnership is evaluating the provisions of this guidance and the potential impact, if any, on its consolidated financial position, results of operations and disclosures.
	In January 2015, the FASB issued guidance that eliminates the concept of extraordinary items. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. The Partnership is evaluating the provisions of this guidance and the potential impact, if any, on its consolidated financial position, results of operations and disclosures.
	In April 2015, the FASB issued guidance, which would require that debt issuance costs be presented in the balance sheet as a direct deduction from the carrying amount of debt liability, consistent with debt discounts or premiums. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. The Partnership is evaluating the provisions of this guidance and the potential impact, if any, on its consolidated financial position, results of operations and disclosures.
	In April 2015, the FASB issued guidance that will help entities evaluate the accounting for fees paid by a customer in a cloud computing arrangement. If a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. This guidance is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2015. The Partnership is evaluating the provisions of this guidance and the potential impact, if any, on its consolidated financial position, results of operations and disclosures.
Fair Value Measurement	Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants and is classified in one of the following three categories:
		•	Level 1 — Consists of unadjusted quoted prices in active markets for identical assets or liabilities that the Partnership has the ability to access as of the reporting date.
		•	Level 2 — Consists of inputs other than quoted prices included within Level 1 that are directly observable for the asset or liability or indirectly observable through corroboration with observable market data.
		•	Level 3 — Consists of unobservable inputs for assets or liabilities whose fair value is estimated based on internally developed models or methodologies using inputs that are generally less readily observable and supported by little, if any, market activity at the measurement date. Unobservable inputs are developed based on the best available information and subject to cost-benefit constraints.
	Fair values of cash, receivables, deposits, other current assets, accounts payable, accrued liabilities and other current liabilities were assumed to approximate carrying value since they are short term and can be settled on demand.
Segment Reporting Policy	The Partnership operates in two business segments, as described below:
		•	East Dubuque – The operations of the East Dubuque Facility, which produces primarily ammonia and urea ammonium nitrate solution (“UAN”).
		•	Pasadena – The operations of the Pasadena Facility, which produces primarily ammonium sulfate.
	The Partnership’s reportable operating segments have been determined in accordance with the Partnership’s internal management structure, which is organized based on operating activities. The Partnership evaluates performance based upon several factors, of which the primary financial measure is segment-operating income (loss).

Fair_Value_Tables

Fair Value (Tables)	3 Months Ended
	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value Disclosure	The following table presents the fair value and carrying value of the Partnership’s borrowings as of March 31, 2015.
		Fair Value						Carrying Value
		(in thousands)
		Level 1		Level 2		Level 3
	Liabilities
	Notes	$	311,002	$	—	$	—	$	320,000
	GE Credit Agreement		—		19,000		—		19,000
	The following table presents the fair value and carrying value of the Partnership’s borrowings as of December 31, 2014.
		Fair Value						Carrying Value
		(in thousands)
		Level 1		Level 2		Level 3
	Liabilities
	Notes	$	310,202	$	—	$	—	$	320,000
	GE Credit Agreement		—		15,000		—		15,000

Derivative_Instruments_Tables

Derivative Instruments (Tables)	3 Months Ended
	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Forward Natural Gas Contracts Recorded In Accrued Liabilities	These forward natural gas contracts are recorded in accrued liabilities on the consolidated balance sheets.
		As of
		March 31,			December 31,
		2015			2014
		(in thousands)
	Forward natural gas contracts recorded in current liabilities:
	Gross amounts recognized	$	1,382		$	3,955
	Gross amounts offset in consolidated balance sheets		(7	)		—
	Net amounts presented in the consolidated balance sheets	$	1,375		$	3,955
Financial Instruments at Fair Value	The following table presents the financial instruments that were accounted for at fair value by level as of March 31, 2015 and December 31, 2014.
		Level 1			Level 2		Level 3
		(in thousands)
	Liabilities
	Forward gas contracts – March 31, 2015	$	—		$	1,375	$	—
	Forward gas contracts – December 31, 2014	$	—		$	3,955	$	—

Inventories_Tables

Inventories (Tables)	3 Months Ended
	Mar. 31, 2015
Inventory Disclosure [Abstract]
Inventories	Inventories consisted of the following:
		As of
		March 31,		December 31,
		2015		2014
		(in thousands)
	Finished goods	$	36,868	$	24,097
	Raw materials		2,788		3,493
	Other		195		146
	Total inventory	$	39,851	$	27,736

Property_Plant_and_Equipment_T

Property, Plant and Equipment (Tables)	3 Months Ended
	Mar. 31, 2015
Property, Plant and Equipment [Abstract]
Summary of Property, Plant and Equipment	Property, plant and equipment consisted of the following:
		As of
		March 31,			December 31,
		2015			2014
		(in thousands)
	Land and land improvements	$	23,184		$	23,184
	Buildings and building improvements		29,751			29,747
	Machinery and equipment		328,336			290,140
	Furniture, fixtures and office equipment		383			316
	Computer equipment and computer software		4,488			3,312
	Vehicles		186			186
	Other		1,475			1,476
			387,803			348,361
	Less: Accumulated depreciation		(95,783	)		(89,350	)
	Total property, plant and equipment, net	$	292,020		$	259,011

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Summary of Commitments to Purchase Natural Gas	Commitments for natural gas purchases consist of the following:
		As of
		March 31,		December 31,
		2015		2014
		(in thousands, except weighted
		average rate)
	MMBtus under fixed-price contracts		3,505		3,188
	MMBtus under index-price contracts		—		540
	Total MMBtus under contracts		3,505		3,728
	Commitments to purchase natural gas	$	10,508	$	15,568
	Weighted average rate per MMBtu based on the fixed rates and the indexes applicable to each contract	$	3	$	4.18

Partners_Capital_and_Partnersh1

Partners' Capital and Partnership Distributions (Tables)	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Schedule of Cash Distributions Made to Partners by Distribution	The following is a summary of cash distributions paid to common unitholders and holders of phantom units during the three months ended March 31, 2015 related to the fourth quarter of 2014:
		December 31,		Total Cash
		2014		Distributions
				Paid in 2015
		(in thousands, except for per unit
		amounts)
	Distribution to common unitholders — affiliates	$	6,975	$	6,975
	Distribution to common unitholders — non-affiliates		4,763		4,763
	Total amount paid	$	11,738	$	11,738
	Per common unit	$	0.3	$	0.3
	Common and phantom units outstanding		39,127

Segment_Information_Tables

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Evaluation of Performance Based on Several Factors	The Partnership evaluates performance based upon several factors, of which the primary financial measure is segment-operating income (loss).
		For the Three Months Ended
		March 31,
		2015			2014
		(in thousands)
	Revenues
	East Dubuque	$	36,752		$	28,491
	Pasadena		32,422			27,789
	Total revenues	$	69,174		$	56,280
	Gross profit
	East Dubuque	$	17,441		$	12,398
	Pasadena		1,342			1,366
	Total gross profit	$	18,783		$	13,764
	Selling, general and administrative expenses
	East Dubuque	$	1,346		$	1,133
	Pasadena		796			1,829
	Total segment selling, general and administrative expenses	$	2,142		$	2,962
	Depreciation and amortization
		For the Three Months Ended
		March 31,
		2015			2014
		(in thousands)
	East Dubuque	$	69		$	37
	Pasadena		360			296
	Total segment depreciation and amortization recorded in operating expenses		429			333
	East Dubuque		3,239		$	2,205
	Pasadena		1,475			766
	Total depreciation and amortization recorded in cost of sales		4,714			2,971
	Total segment depreciation and amortization	$	5,143		$	3,304
	Other operating income
	East Dubuque	$	(4	)	$	(6	)
	Pasadena		—			—
	Total segment other operating income	$	(4	)	$	(6	)
	Operating income (loss)
	East Dubuque	$	16,030		$	11,234
	Pasadena		186			(759	)
	Total segment operating income	$	16,216		$	10,475
	Interest expense
	East Dubuque	$	19		$	22
	Pasadena		—			—
	Total segment interest expense	$	19		$	22
	Net income (loss)
	East Dubuque	$	16,022		$	11,209
	Pasadena		163			(786	)
	Total segment net income	$	16,185		$	10,423
	Reconciliation of segment net income to consolidated net income:
	Segment net income	$	16,185		$	10,423
	Partnership and unallocated expenses recorded as selling, general and administrative expenses		(2,194	)		(2,316	)
	Partnership and unallocated expenses recorded as other expense		(29	)		—
	Unallocated interest expense and loss on interest rate swaps		(5,009	)		(4,982	)
	Consolidated net income	$	8,953		$	3,125
		As of			As of
		March 31,			December 31,
		2015			2014
		(in thousands)
	Total assets
	East Dubuque	$	194,591		$	186,508
	Pasadena		197,104			193,737
	Total segment assets	$	391,695		$	380,245
	Reconciliation of segment total assets to consolidated total assets:
	Segment total assets	$	391,695		$	380,245
	Partnership and other		40,507			34,071
	Consolidated total assets	$	432,202		$	414,316
		For the Three Months Ended March 31,
	2015			2014
	(in thousands)
Capital expenditures
East Dubuque	$	6,973		$	5,677
Pasadena		3,390			11,645
Partnership and other		—			—
Total capital expenditures	$	10,363		$	17,322

Net_Income_Per_Common_Unit_Tab

Net Income Per Common Unit (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Basic and Diluted Net Income Per Common Unit	The following table sets forth the computation of basic and diluted net income per common unit:
		For the Three Months Ended
		March 31,
		2015		2014
		(in thousands, except for per
		unit data)
	Numerator:
	Net income	$	8,953	$	3,125
	Less: Income allocated to unvested units		64		15
	Net income allocated to common unitholders	$	8,889	$	3,110
	Denominator:
	Weighted average common units outstanding		38,913		38,889
	Effect of dilutive units:
	Phantom units		14		47
	Diluted units outstanding		38,927		38,936
	Basic net income per common unit	$	0.23	$	0.08
	Diluted net income per common unit	$	0.23	$	0.08

Fair_Value_Fair_Value_Disclosu

Fair Value - Fair Value Disclosure (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Liabilities
Notes	$320,000	$320,000
GE Credit Agreement [Member]
Line of Credit Facility [Line Items]
GE Credit Agreement	19,000	15,000
Level 1 [Member]
Liabilities
Notes	311,002	310,202
Level 2 [Member] | GE Credit Agreement [Member]
Line of Credit Facility [Line Items]
GE Credit Agreement	$19,000	$15,000

Fair_Value_Additional_Informat

Fair Value - Additional Information (Detail) (USD $)	Mar. 31, 2015
Debt Instrument, Fair Value Disclosure [Abstract]
Senior secured notes interest percentage	6.50%
Senior secured notes issued	$320,000,000

Derivative_Instruments_Additio

Derivative Instruments - Additional Information (Detail) (Forward Contracts [Member], USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Forward Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized gain (loss)	$2,600,000	$0

Derivative_Instruments_Forward

Derivative Instruments - Forward Natural Gas Contracts Recorded In Accrued Liabilities (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Forward natural gas contracts recorded in current liabilities:
Gross amounts recognized	$1,382	$3,955
Gross amounts offset in consolidated balance sheets	-7
Net amounts presented in the consolidated balance sheets	$1,375	$3,955

Derivative_Instruments_Financi

Derivative Instruments - Financial Instruments at Fair Value (Detail) (Level 2 [Member], USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Level 2 [Member]
Liabilities
Forward gas contracts	$1,375	$3,955

Inventories_Inventories_Detail

Inventories - Inventories (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]
Finished goods	$36,868	$24,097
Raw materials	2,788	3,493
Other	195	146
Total inventory	$39,851	$27,736

Property_Plant_and_Equipment_S

Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$387,803	$348,361
Less: Accumulated depreciation	-95,783	-89,350
Total property, plant and equipment, net	292,020	259,011
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	23,184	23,184
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	29,751	29,747
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	328,336	290,140
Furniture, Fixtures and Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	383	316
Computers Equipment And Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	4,488	3,312
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	186	186
Property, Plant and Equipment, Other Types [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$1,475	$1,476

Property_Plant_and_Equipment_A

Property, Plant and Equipment - Additional Information (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Property Plant and Equipment Useful Life and Values [Abstract]
Construction in progress	$14,997,000	$47,758,000
Capitalized interest costs	$400,000	$1,700,000

Debt_Additional_Information_De

Debt - Additional Information (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Debt Instrument [Line Items]
Long Term Debt Outstanding	$339,000	$335,000
Note Payable [Member]
Debt Instrument [Line Items]
Long Term Debt Outstanding	320,000	320,000
GE Credit Agreement [Member]
Debt Instrument [Line Items]
Long Term Debt Outstanding	$19,000	$15,000

Commitments_and_Contingencies_1

Commitments and Contingencies - Summary of Commitments to Purchase Natural Gas (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
	MMBTU	MMBTU
Oil and Gas Delivery Commitments and Contracts [Line Items]
Total MMBtus associated with additional forward purchase contracts	3,505,000	3,728,000
Commitments to purchase natural gas	$10,508	$15,568
Weighted average rate per MMBtu	3	4.18
MMBtus Under Fixed-Price Contracts [Member]
Oil and Gas Delivery Commitments and Contracts [Line Items]
Total MMBtus associated with additional forward purchase contracts	3,505,000	3,188,000
MMBtus Under Index-Price Contracts [Member]
Oil and Gas Delivery Commitments and Contracts [Line Items]
Total MMBtus associated with additional forward purchase contracts		540,000

Commitments_and_Contingencies_2

Commitments and Contingencies - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended	1 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Apr. 30, 2015
	MMBTU	MMBTU
Subsequent Event [Line Items]
Total MMBtus associated with additional forward purchase contracts	3,505,000	3,728,000
Weighted average rate per MMBtu	3	4.18
Cost of Project Under Settlement Agreement With Environmental Protection Agency	$0.40
Estimated Time of Installation of Ammonia Safety Flare	1-Dec-15
Penalty for settlement agreement	0.1
Loss contingencies, change orders for approval and payment	10
Subsequent Event [Member]
Subsequent Event [Line Items]
Purchase commitments			4.1
Fixed Quantity Forward Purchase Contracts [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Total MMBtus associated with additional forward purchase contracts			1,600,000
Weighted average rate per MMBtu			2.66
Forward Gas Contracts [Member]
Subsequent Event [Line Items]
Deposits, forward gas contracts	$0.70

Partners_Capital_and_Partnersh2

Partners' Capital and Partnership Distributions - Additional Information (Detail) (Phantom Share Units (PSUs) [Member])	Mar. 31, 2015
Phantom Share Units (PSUs) [Member]
Partnership Equity And Distribution [Line Items]
Settled phantom units	212,691

Partners_Capital_and_Partnersh3

Partners' Capital and Partnership Distributions - Schedule of Cash Distributions Made to Partners by Distribution (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Distribution Made to Limited Partner [Line Items]
Distribution to common unitholders	$11,738	$11,738
Per common unit	$0.30	$0.30
Common and phantom units outstanding		39,127
Affiliated Entity [Member]
Distribution Made to Limited Partner [Line Items]
Distribution to common unitholders	6,975	6,975
Non-Affiliated Entity [Member]
Distribution Made to Limited Partner [Line Items]
Distribution to common unitholders	$4,763	$4,763

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Illinois [Member]
Income Tax Examination [Line Items]
State income tax (benefit) expense	$14,000	$3,000
Texas [Member]
Income Tax Examination [Line Items]
State income tax (benefit) expense	$23,000	$27,000

Segment_Information_Additional

Segment Information - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2015
	Segment
Segment Reporting [Abstract]
Number of operating segments	2

Segment_Information_Evaluation

Segment Information - Evaluation of Performance Based on Several Factors (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Revenues
Total revenues	$69,174	$56,280
Gross profit
Total gross profit	18,783	13,764
Selling, general and administrative expenses
Total selling, general and administrative expense	4,336	5,278
Depreciation and amortization
Total segment depreciation and amortization recorded in operating expenses	429	333
Total segment depreciation and amortization	5,143	3,304
Other operating income
Total other operating income	4	6
Operating income (loss)
Operating income (loss)	14,022	8,159
Interest expense
Total interest expense	5,028	5,004
Net income (loss)
Net income (loss)	8,953	3,125
Reconciliation of segment net income to consolidated net income:
Net income (loss)	8,953	3,125
Total selling, general and administrative expense	4,336	5,278
Total other operating (income) expense	4	6
Total interest expense	5,028	5,004
Net income (loss)	8,953	3,125
Total assets
Total assets	432,202		414,316
Reconciliation of segment total assets to consolidated total assets:
Partnership and other	40,507		34,071
Total assets	432,202		414,316
Capital expenditures
Total capital expenditures	10,363	17,322
Segment net income (loss) [Member]
Revenues
Total revenues	69,174	56,280
Gross profit
Total gross profit	18,783	13,764
Selling, general and administrative expenses
Total selling, general and administrative expense	2,142	2,962
Depreciation and amortization
Total segment depreciation and amortization recorded in operating expenses	429	333
Total depreciation and amortization recorded in cost of sales	4,714	2,971
Other operating income
Total other operating income	-4	-6
Operating income (loss)
Operating income (loss)	16,216	10,475
Interest expense
Total interest expense	19	22
Net income (loss)
Net income (loss)	16,185	10,423
Reconciliation of segment net income to consolidated net income:
Net income (loss)	16,185	10,423
Total selling, general and administrative expense	2,142	2,962
Total other operating (income) expense	-4	-6
Total interest expense	19	22
Net income (loss)	16,185	10,423
Total assets
Total assets	391,695		380,245
Reconciliation of segment total assets to consolidated total assets:
Total assets	391,695		380,245
East Dubuque [Member]
Capital expenditures
Total capital expenditures	6,973	5,677
East Dubuque [Member] | Operating Segments [Member]
Revenues
Total revenues	36,752	28,491
Gross profit
Total gross profit	17,441	12,398
Selling, general and administrative expenses
Total selling, general and administrative expense	1,346	1,133
Depreciation and amortization
Total segment depreciation and amortization recorded in operating expenses	69	37
Total depreciation and amortization recorded in cost of sales	3,239	2,205
Other operating income
Total other operating income	-4	-6
Operating income (loss)
Operating income (loss)	16,030	11,234
Interest expense
Total interest expense	19	22
Net income (loss)
Net income (loss)	16,022	11,209
Reconciliation of segment net income to consolidated net income:
Net income (loss)	16,022	11,209
Total selling, general and administrative expense	1,346	1,133
Total other operating (income) expense	-4	-6
Total interest expense	19	22
Net income (loss)	16,022	11,209
Total assets
Total assets	194,591		186,508
Reconciliation of segment total assets to consolidated total assets:
Total assets	194,591		186,508
Pasadena Facility [Member]
Capital expenditures
Total capital expenditures	3,390	11,645
Pasadena Facility [Member] | Operating Segments [Member]
Revenues
Total revenues	32,422	27,789
Gross profit
Total gross profit	1,342	1,366
Selling, general and administrative expenses
Total selling, general and administrative expense	796	1,829
Depreciation and amortization
Total segment depreciation and amortization recorded in operating expenses	360	296
Total depreciation and amortization recorded in cost of sales	1,475	766
Operating income (loss)
Operating income (loss)	186	-759
Net income (loss)
Net income (loss)	163	-786
Reconciliation of segment net income to consolidated net income:
Net income (loss)	163	-786
Total selling, general and administrative expense	796	1,829
Net income (loss)	163	-786
Total assets
Total assets	197,104		193,737
Reconciliation of segment total assets to consolidated total assets:
Total assets	197,104		193,737
Reportable Segments [Member]
Total assets
Total assets	391,695		380,245
Reconciliation of segment total assets to consolidated total assets:
Total assets	391,695		380,245
RNP Corporate Segment [Member]
Selling, general and administrative expenses
Total selling, general and administrative expense	-2,194	-2,316
Other operating income
Total other operating income	-29
Interest expense
Total interest expense	-5,009	-4,982
Reconciliation of segment net income to consolidated net income:
Total selling, general and administrative expense	-2,194	-2,316
Total other operating (income) expense	-29
Total interest expense	($5,009)	($4,982)

Net_Income_Per_Common_Unit_Bas

Net Income Per Common Unit - Basic and Diluted Net Income Per Common Unit (Detail) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Numerator:
Net income	$8,953	$3,125
Less: Income allocated to unvested units	64	15
Net income allocated to common unitholders	$8,889	$3,110
Denominator:
Weighted average common units outstanding	38,913	38,889
Effect of dilutive units:
Phantom units	14	47
Diluted units outstanding	38,927	38,936
Basic net income per common unit	$0.23	$0.08
Diluted net income per common unit	$0.23	$0.08

Net_Income_Per_Common_Unit_Add

Net Income Per Common Unit - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share [Abstract]
Phantom units excluded from calculation of diluted net income per common unit	133,000	0

Related_Parties_Additional_Inf

Related Parties - Additional Information (Detail) (Partnership [Member], USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Partnership [Member]
Related Party Transaction [Line Items]
Partnership billed related to services agreement	$1.90	$2.60

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (USD $)	3 Months Ended	0 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2015	11-May-15
Subsequent Event [Line Items]
Date of declaration for distribution of cash to partnership's common unitholders	11-May-15
Date of distribution for distribution of cash to partnership's common unitholders	29-May-15
Limited partner distribution record date	22-May-15
Subsequent Event [Member]
Subsequent Event [Line Items]
Cash distribution per unit declared to the partnership's common unitholders		$0.36
Total distributions to partnership's common unitholders		$14.10