Rentech (RTK) Inactive 10-K17 Mar 142013 FY Annual reportFinancial data

Company Profile

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2013	Feb. 28, 2014	Jun. 28, 2013
Document And Entity Information [Abstract]	'	'	'
Document Type	'10-K	'	'
Amendment Flag	'false	'	'
Document Period End Date	31-Dec-13	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'FY	'	'
Entity Registrant Name	'RENTECH INC /CO/	'	'
Entity Central Index Key	'0000868725	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Well-known Seasoned Issuer	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Filer Category	'Accelerated Filer	'	'
Entity Common Stock, Shares Outstanding	'	227,530,698	'
Entity Public Float	'	'	$463.40

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current assets	'	'
Cash	$106,369	$141,736
Accounts receivable, including unbilled revenue, net of allowance for doubtful accounts of $0 at December 31, 2013 and 2012, respectively	14,227	9,705
Inventories	35,376	27,140
Prepaid expenses and other current assets	8,328	7,046
Deferred income taxes	1,140	766
Other receivables, net	7,432	4,670
Total current assets	172,872	191,063
Property, plant and equipment, net	334,660	134,195
Construction in progress	60,136	61,417
Other assets	'	'
Goodwill	57,134	56,592
Intangible assets	59,730	26,185
Debt issuance costs	9,321	6,458
Property held for sale	4,641	2,475
Deposits and other assets	5,096	817
Total other assets	135,922	92,527
Total assets	703,590	479,202
Current liabilities	'	'
Accounts payable	20,026	17,788
Accrued payroll and benefits	9,511	8,445
Accrued liabilities	35,449	17,044
Deferred revenue	21,643	29,699
Current portion of long term debt	9,916	7,750
Accrued interest	5,490	142
Asset retirement obligation	19	2,776
Other	996	360
Total current liabilities	103,050	84,004
Long-term liabilities	'	'
Debt	412,063	185,540
Earn-out consideration	1,544	4,920
Asset retirement obligation	2,995	313
Deferred income taxes	9,271	766
Other	6,711	2,591
Total long-term liabilities	432,584	194,130
Total liabilities	535,634	278,134
Commitments and contingencies (Note 13)	'	'
Stockholders' equity	'	'
Common stock - $.01 par value; 450,000 shares authorized; 227,512 and 224,121 shares issued and outstanding at December 31, 2013 and 2012, respectively	2,275	2,241
Additional paid-in capital	541,254	539,448
Accumulated deficit	-385,339	-383,807
Accumulated other comprehensive income (loss)	-117	105
Total Rentech stockholders' equity	158,073	157,987
Noncontrolling interests	9,883	43,081
Total equity	167,956	201,068
Total liabilities and stockholders' equity	703,590	479,202
Series A Convertible Preferred Shares [Member]	'	'
Stockholders' equity	'	'
Preferred stock	'	'
Series C Participating Cumulative Preferred Stock [Member]	'	'
Stockholders' equity	'	'
Preferred stock	'	'
Series D Junior Participating Preferred Stock [Member]	'	'
Stockholders' equity	'	'
Preferred stock	'	'

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Allowance for accounts receivable	$0	$0
Preferred stock, par value	$10	$10
Preferred stock, shares authorized	1,000	1,000
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	450,000	450,000
Common stock, shares issued	227,512	224,121
Common stock, shares outstanding	227,512	224,121
Series A Convertible Preferred Shares [Member]	'	'
Preferred stock, shares authorized	90	90
Preferred stock, shares issued	90	90
Preferred stock, shares outstanding	'	'
Preferred stock, liquidation preference per share	$0	$0
Series C Participating Cumulative Preferred Stock [Member]	'	'
Preferred stock, par value	$10	$10
Preferred stock, shares authorized	500	500
Preferred stock, shares issued	'	'
Preferred stock, shares outstanding	'	'
Series D Junior Participating Preferred Stock [Member]	'	'
Preferred stock, par value	$10	$10
Preferred stock, shares authorized	45	45
Preferred stock, shares issued	'	'
Preferred stock, shares outstanding	'	'

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	3 Months Ended		12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2011
Revenues	'	'	'	'	'	'
Product sales	$63,014	$42,962	$322,267	$261,368	$199,909	$179,857
Service revenues	52	52	50,083	206	206	206
Other revenues	'	'	2,505	351	'	'
Total revenues	63,066	43,014	374,855	261,925	200,115	180,063
Cost of sales	'	'	'	'	'	'
Product	37,460	26,835	252,741	129,806	113,911	103,286
Service	50	51	38,423	200	199	200
Total cost of sales	37,510	26,886	291,164	130,006	114,110	103,486
Gross profit	25,556	16,128	83,691	131,919	86,005	76,577
Operating expenses	'	'	'	'	'	'
Selling, general and administrative expense	10,498	7,687	59,076	48,240	30,815	28,004
Research and development	4,202	5,426	5,747	20,944	28,785	30,009
Depreciation and amortization	566	573	3,113	3,754	2,218	2,225
Agrifos goodwill impairment	'	'	30,029	'	'	'
Loss on impairments	583	53	'	15,965	59,272	58,742
Advance for equity investment	'	'	'	'	-7,892	-7,892
(Gain) loss on sale of assets	-507	'	-5,379	272	16	523
Other	'	'	-15	-600	'	'
Total operating expenses	15,342	13,739	92,571	88,575	113,214	111,611
Operating income (loss)	10,214	2,389	-8,880	43,344	-27,209	-35,034
Other income (expense), net	'	'	'	'	'	'
Interest expense	-4,098	-3,730	-16,382	-8,949	-17,034	-16,666
Loss on debt extinguishment	-10,263	-4,593	-6,001	-4,801	-19,486	-13,816
Fair value adjustment to earn-out consideration	'	'	5,122	'	'	'
Other income (expense), net	51	52	-170	-693	139	137
Total other expenses, net	-14,310	-8,271	-17,431	-14,443	-36,381	-30,345
Income (loss) from continuing operations before income taxes and equity in loss of investee	-4,096	-5,882	-26,311	28,901	-63,590	-65,379
Income tax (benefit) expense	2	2	-26,591	1,364	6	3
Income (loss) from continuing operations before equity in loss of investee	-4,098	-5,884	280	27,537	-63,596	-65,382
Equity in loss of investee	'	'	-242	'	'	'
Income (loss) from continuing operations	-4,098	-5,884	38	27,537	-63,596	-65,382
Income from discontinued operations	'	'	'	150	'	'
Net income (loss)	-4,098	-5,884	38	27,687	-63,596	-65,382
Net (income) loss attributable to noncontrolling interests	-4,433	366	-1,570	-41,687	-3,700	1,099
Net loss attributable to Rentech common shareholders	($8,531)	($5,518)	($1,532)	($14,000)	($67,296)	($64,283)
Basic and diluted:	'	'	'	'	'	'
Continuing operations	($0.04)	($0.02)	($0.01)	($0.06)	($0.30)	($0.29)
Discontinued operations	$0	$0	$0	$0	$0	$0
Net income (loss)	($0.04)	($0.02)	($0.01)	($0.06)	($0.30)	($0.29)
Weighted-average shares used to compute net loss per common share:	'	'	'	'	'	'
Basic and diluted	224,414	221,980	226,139	223,189	223,281	222,664

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (Loss) (USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2011
Statement Of Income And Comprehensive Income [Abstract]	'	'	'	'	'	'
Net income (loss)	($4,098)	($5,884)	$38	$27,687	($63,596)	($65,382)
Other comprehensive income, net of tax:	'	'	'	'	'	'
Pension and postretirement plan adjustments	'	'	1,143	166	'	'
Foreign currency translation	'	'	-907	6	'	'
Other comprehensive income	'	'	236	172	'	'
Comprehensive income (loss)	-4,098	-5,884	274	27,859	-63,596	-65,382
Less: net (income) loss attributable to noncontrolling interests	-4,433	366	-1,570	-41,687	-3,700	1,099
Less: other comprehensive income attributable to noncontrolling interests	'	'	-458	-67	'	'
Comprehensive loss attributable to Rentech	($8,531)	($5,518)	($1,754)	($13,895)	($67,296)	($64,283)

Consolidated_Statements_of_Sto

Consolidated Statements of Stockholders' Equity (USD $)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income [Member]	Total Rentech Stockholders' Equity [Member]	Noncontrolling Interests [Member]
In Thousands, except Share data	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income [Member]	Total Rentech Stockholders' Equity [Member]	Noncontrolling Interests [Member]
Beginning balance at Sep. 30, 2010	$45,353	$2,217	$332,696	($296,993)	'	$37,920	$7,433
Beginning balance, Shares at Sep. 30, 2010	'	221,731,000	'	'	'	'	'
Acquisition of additional interest in subsidiary	'	'	5,797	'	'	5,797	-5,797
Payment of offering costs	-58	'	-58	'	'	-58	'
Issuance of common stock	'	5	-5	'	'	'	'
Issuance of common stock, Shares	'	465,000	'	'	'	'	'
Equity-based compensation expense	1,729	'	1,729	'	'	1,729	'
Restricted stock units	-708	12	-720	'	'	-708	'
Restricted stock units, Shares	'	1,213,000	'	'	'	'	'
Net income (loss)	-65,382	'	'	-64,283	'	-64,283	-1,099
Other	-25	'	-25	'	'	-25	'
Ending balance, Shares	'	223,409,000	'	'	'	'	'
Ending balance at Sep. 30, 2011	-19,091	2,234	339,414	-361,276	'	-19,628	537
Ending balance, Shares at Sep. 30, 2011	'	223,409,000	'	'	'	'	'
Noncontrolling interests/Adjustment for investment in Rentech Nitrogen Partners, L.P.	275,092	'	240,662	'	'	240,662	34,430
Common stock issued for acquisition	2,680	'	2,680	'	'	2,680	'
Equity-based compensation expense	1,137	'	1,112	'	'	1,112	25
Common stock issued for stock options exercised	30	'	30	'	'	30	'
Common stock issued for stock options exercised, Shares	'	31,000	'	'	'	'	'
Common stock issued for warrants exercised	'	11	-11	'	'	'	'
Common stock issued for warrants exercised, Shares	'	1,052,000	'	'	'	'	'
Restricted stock units	-425	7	-432	'	'	-425	'
Restricted stock units, Shares	'	739,000	'	'	'	'	'
Net income (loss)	-4,098	'	'	-8,531	'	-8,531	4,433
Other	3	'	3	'	'	3	'
Income taxes payable adjustment	-7,055	'	-7,055	'	'	-7,055	'
Ending balance, Shares	'	225,231,000	'	'	'	'	'
Ending balance at Dec. 31, 2011	248,273	2,252	576,403	-369,807	'	208,848	39,425
Ending balance, Shares at Dec. 31, 2011	'	225,231,000	'	'	'	'	'
Balance, before adjustment at Dec. 31, 2011	255,328	2,252	583,458	-369,807	'	215,903	39,425
Balance, Shares before adjustment at Dec. 31, 2011	'	225,231,000	'	'	'	'	'
Agrifos acquisition	20,000	'	11,177	'	'	11,177	8,823
Common stock issued for services	'	2	-2	'	'	'	'
Common stock issued for services, Shares	'	259,000	'	'	'	'	'
Common stock issued for acquisition	'	20	-20	'	'	'	'
Common stock issued for acquisition, Shares	'	2,000,000	'	'	'	'	'
Equity-based compensation expense	10,849	'	9,737	'	'	9,737	1,112
Common stock issued for stock options exercised	290	3	287	'	'	290	'
Common stock issued for stock options exercised, Shares	'	264,000	'	'	'	'	'
Common stock issued for warrants exercised	2,440	34	2,406	'	'	2,440	'
Common stock issued for warrants exercised, Shares	'	3,371,000	'	'	'	'	'
Payment of stock issuance costs	-40	'	-40	'	'	-40	'
Distributions	-44,100	'	-44,100	'	'	-44,100	'
Distribution to noncontrolling interests	-47,205	'	'	'	'	'	-47,205
Restricted stock units	-2,527	21	-2,548	'	'	-2,527	'
Restricted stock units, Shares	'	2,080,000	'	'	'	'	'
Repurchase of common stock, including commissions	-16,721	-91	-16,630	'	'	-16,721	'
Repurchase of common stock, including commissions, Shares	'	-9,084,000	'	'	'	'	'
Income tax provision true-up for prior year equity adjustment	2,757	'	2,757	'	'	2,757	'
Net income (loss)	27,687	'	'	-14,000	'	-14,000	41,687
Other comprehensive income	172	'	'	'	105	105	67
Other	-807	'	21	'	'	21	-828
Ending balance, Shares	'	224,121,000	'	'	'	'	'
Ending balance at Dec. 31, 2012	201,068	2,241	539,448	-383,807	105	157,987	43,081
Ending balance, Shares at Dec. 31, 2012	'	224,121,000	'	'	'	'	'
Noncontrolling interests/Adjustment for investment in Rentech Nitrogen Partners, L.P.	4,000	'	'	'	'	'	4,000
Acquisition of additional interest in subsidiary	-2,500	'	-536	'	'	-536	-1,964
Common stock issued for services	'	2	-2	'	'	'	'
Common stock issued for services, Shares	'	178,000	'	'	'	'	'
Equity-based compensation expense	7,400	'	6,814	'	'	6,814	586
Common stock issued for stock options exercised	298	5	293	'	'	298	'
Common stock issued for stock options exercised, Shares	'	533,000	'	'	'	'	'
Payment of stock issuance costs	-48	'	-48	'	'	-48	'
Distribution to noncontrolling interests	-37,329	'	'	'	'	'	-37,329
Restricted stock units	-4,688	27	-4,715	'	'	-4,688	'
Restricted stock units, Shares	'	2,680,000	'	'	'	'	'
Net income (loss)	38	'	'	-1,532	'	-1,532	1,570
Other comprehensive income	236	'	'	'	-222	-222	458
Other	-519	'	'	'	'	'	-519
Ending balance, Shares	'	227,512,000	'	'	'	'	'
Ending balance at Dec. 31, 2013	$167,956	$2,275	$541,254	($385,339)	($117)	$158,073	$9,883
Ending balance, Shares at Dec. 31, 2013	'	227,512,000	'	'	'	'	'

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2011
Cash flows from operating activities	'	'	'	'	'
Net income (loss)	($4,098)	($5,884)	$38	$27,687	($65,382)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities	'	'	'	'	'
Depreciation and amortization	3,776	3,062	21,184	14,824	11,836
Agrifos goodwill impairment	'	'	30,029	'	'
Deferred income tax benefit	'	'	-27,130	'	'
Loss on asset impairments	583	53	'	15,965	58,742
Advance for equity investment	'	'	'	'	-7,892
Utilization of spare parts	309	380	3,821	2,042	1,698
Write-down of inventory	'	'	12,360	'	'
Non-cash interest expense	1,880	1,793	248	7,138	7,146
Net (gain) loss on sale of fixed assets	-507	'	-5,379	272	523
Loss on debt extinguishment	10,263	4,593	6,001	4,801	13,816
Equity-based compensation	1,137	1,106	7,400	10,849	1,729
Payment of call premium fee	-2,933	'	'	'	-8,261
Other	9	9	957	181	115
Changes in operating assets and liabilities:	'	'	'	'	'
Accounts receivable	-2,811	-7,026	-585	927	4,969
Other receivables	-1,015	37	3,326	124	-979
Inventories	11,164	1,451	-18,075	8,727	-9,218
Other assets	-1,409	303	-766	2,807	955
Prepaid expenses and other current assets	586	257	380	-571	167
Accounts payable	-412	-1,035	-7,048	1,810	-544
Deferred revenue	-13,802	17,028	-9,115	-3,954	19,681
Accrued interest	-566	-513	4,110	'	-40
Accrued liabilities, accrued payroll and other	-4,698	-2,313	-9,402	-23,392	7,408
Net cash provided by (used in) operating activities	-2,544	13,301	12,354	70,237	36,469
Cash flows from investing activities	'	'	'	'	'
Payment for acquisitions, net of cash acquired	'	'	-65,823	-128,596	'
Capital expenditures	-12,423	-10,450	-104,705	-59,131	-39,402
Proceeds from disposal of assets	140	'	8,991	569	30
Other items	2,819	127	-657	-1,040	-868
Net cash used in investing activities	-9,464	-10,323	-162,194	-188,198	-40,240
Cash flows from financing activities	'	'	'	'	'
Proceeds from issuance of notes	'	'	320,000	'	'
Payment of offering costs	'	'	-972	'	'
Proceeds from initial public offering, net of costs	276,007	'	'	-245	'
Proceeds from credit facilities and term loan, net of original issue discount	'	50,960	65,600	222,780	200,960
Payments and retirement of debt	-146,250	-22,522	-223,105	-86,990	-119,041
Proceeds from issuance of common stock	30	'	'	'	'
Repurchase of common stock, including commissions	'	'	'	-16,721	'
Payment of stock issuance costs	'	-2	-48	-40	-58
Proceeds from options and warrants exercised	'	'	297	2,729	'
Payment of debt issuance costs	-904	-290	-9,972	-7,788	-8,747
Other	-606	-684	2	-1,000	-2,280
Distributions	'	'	'	-43,301	'
Distributions to noncontrolling interests	'	'	-37,329	-47,205	'
Net cash provided by financing activities	128,277	27,462	114,473	22,219	70,834
Increase (decrease) in cash	116,269	30,440	-35,367	-95,742	67,063
Cash and cash equivalents, beginning of period	121,209	54,146	141,736	237,478	54,146
Cash and cash equivalents, end of period	237,478	84,586	106,369	141,736	121,209
Cash payments of interest	'	'	'	'	'
Net of capitalized interest of $3,246 (Dec 2013), $701 (Dec 2012), $0 (Dec 2011), $1,116 (Dec 2010) and $4,868 (2011)	2,783	3,566	12,367	3,805	14,427
Cash payments of income taxes from continuing operations	2	12	288	8,609	13
Purchase of insurance policies financed with notes payable	867	516	'	'	1,872
Restricted stock units surrendered for withholding taxes payable	425	303	4,688	2,527	708
Units issued for acquisition	'	'	'	20,000	'
Fair value of assets and liabilities assumed in acquisition	'	'	181,975	'	7,530
Contingent consideration	'	'	1,850	'	'
Adjustment for investment in subsidiary	240,362	'	'	'	'
Receivables from sales of property, plant and equipment in other receivables	741	'	'	'	325
Purchase of property, plant, equipment and construction in progress in accounts payable and accrued liabilities	3,914	3,547	20,503	5,301	11,904
Prepaid initial public offering costs offset against proceeds of initial public offering	3,907	'	'	'	'
Initial public offering costs in accrued liabilities	72	'	'	'	'
Adjustment to intangible assets for shares granted for earn-out payment	2,680	'	'	20	'
Financed construction costs	'	'	$5,181	'	'

Consolidated_Statements_of_Cas1

Consolidated Statements of Cash Flows (Parenthetical) (USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2011
Statement Of Cash Flows [Abstract]	'	'	'	'	'
Capitalized interest	$0	$1,116	$3,246	$701	$4,868

Description_of_Business

Description of Business	12 Months Ended
Description of Business	Dec. 31, 2013
Accounting Policies [Abstract]	'
Description of Business	'
	Note 1 — Description of Business
	Description of Business
	Rentech, Inc. (“Rentech,” “the Company,” “we,” “us” or “our”) operates currently in five segments including East Dubuque, Pasadena, Fulghum Fibres, wood pellets and energy technologies.
	The Company through its indirect majority-owned subsidiary, Rentech Nitrogen Partners, L.P. (“RNP”), owns and operates two fertilizer facilities: the Company’s East Dubuque Facility and the Company’s Pasadena Facility, referred to collectively as the “Fertilizer Facilities.” Our East Dubuque Facility is located in East Dubuque, Illinois, and has been in operation since 1965. The Company produces primarily ammonia and urea ammonium nitrate solution (“UAN”) at the Company’s East Dubuque Facility, using natural gas as the facility’s primary feedstock. Our Pasadena Facility, which the Company acquired in November 2012, is located in Pasadena, Texas, and has been in operation producing various products since the 1940s. In 2011, the Company’s Pasadena Facility was converted to the production of high-quality granulated synthetic ammonium sulfate, and began selling ammonium sulfate and ammonium thiosulfate as its primary products using ammonia and sulfate as the facility’s primary feedstocks. The Company produces ammonium sulfate, ammonium thiosulfate and sulfuric acid at the Company’s Pasadena Facility, using ammonia and sulfur as the facility’s primary feedstocks. The noncontrolling interests reflected on the Company’s consolidated balance sheets are affected by the net income of, and distribution from, RNP.
	On November 9, 2011, RNP completed its initial public offering (the “Offering”) of 15,000,000 common units representing limited partner interests at a public offering price of $20.00 per common unit. The common units sold to the public in the Offering represented 39.2% of RNP common units outstanding as of the closing of the Offering. Rentech Nitrogen Holdings, Inc. (“RNHI”), Rentech’s indirect wholly-owned subsidiary, owned the remaining 60.8% of RNP common units outstanding as of the closing of the Offering and Rentech Nitrogen GP, LLC (the “General Partner”), RNHI’s wholly-owned subsidiary, owns 100% of the non-economic general partner interest in RNP. RNP’s assets consisted as of the closing of the Offering of all of the equity interests of Rentech Nitrogen, LLC (“RNLLC”), formerly known as Rentech Energy Midwest Corporation (“REMC”), which owns the East Dubuque Facility. At the closing of the Offering, RNLLC was converted into a limited liability company. In connection with the Offering, the Company received proceeds, net of costs of $275.1 million. The Company recorded additional paid-in capital of $240.7 million and a noncontrolling interest of $34.4 million which represented 39.2% of the net book value of RNP. As a result of the Offering, there was no change in control and, there was no step up in accounting basis of assets or gain recognized.
	On November 1, 2012, RNP completed its acquisition of 100% of the membership interests of Agrifos LLC (“Agrifos”) from Agrifos Holdings Inc. (the “Seller”), pursuant to a Membership Interest Purchase Agreement (the “Purchase Agreement”). Upon the closing of this transaction (the “Agrifos Acquisition”), Agrifos became a wholly-owned subsidiary of RNP and its name changed to Rentech Nitrogen Pasadena Holdings, LLC. Rentech Nitrogen Pasadena Holdings, LLC owns all of the member interests in Rentech Nitrogen Pasadena, LLC (“RNPLLC”), formerly known as Agrifos Fertilizer, LLC, which owns and operates the Pasadena Facility. For information on the Agrifos Acquisition refer to Note 4 — Agrifos Acquisition.
	On May 1, 2013, the Company acquired all of the capital stock of Fulghum Fibres, Inc. (“Fulghum”). Upon the closing of this transaction (the “Fulghum Acquisition”), Fulghum became a wholly-owned subsidiary of the Company. Fulghum provides high-quality wood chipping and wood yard operations services, and produces and sells wood chips to the pulp, paper and packaging industry. Through Fulghum and its subsidiaries, the Company now operates 32 wood chipping mills, of which 26 are located in the United States, five in Chile and one in Uruguay. Noncontrolling interests of $4.0 million represent the non-acquired ownership interests in the subsidiaries located in Chile and Uruguay as of May 1, 2013. During the calendar year 2013, Fulghum acquired an additional equity interest of approximately 13% in the subsidiary located in Chile. Fulghum currently owns approximately 88% and 87% of the equity interests in the subsidiaries located in Chile and Uruguay, respectively. For information on the Fulghum Acquisition refer to Note 3 — Fulghum Acquisition.

	Each of Fulghum’s United States mills typically operates under an exclusive processing agreement with a single customer. Under each agreement, the customer is responsible for procuring and delivering wood, and Fulghum is paid a processing fee based on tons processed, with minimum and maximum fees tied to volumes. In most cases, if the customer fails to deliver the minimum contracted log volume for processing, it must pay a shortage fee to Fulghum. Generally, under the terms of the Company’s processing agreements, customers have the option to purchase the mill equipment for a pre-negotiated amount (which decreases over time) and, in some cases, customers have the option to acquire the land. Fulghum’s Chilean operations also include the sale of wood chips for export and the local sale of bark for power production. In both situations, the wood is purchased by Fulghum.
	In connection with the Fulghum Acquisition, the Company entered into a joint venture with Graanul Invest AS (“Graanul”), a European producer of wood pellets, for the potential development and construction of, and investment in, wood pellet plants in the United States and Canada. The Company and Graanul each own 50% equity interests in the joint venture (the “Rentech/Graanul JV”) which is accounted for under the equity method. The two facilities under development in Eastern Canada will not be owned by the Rentech/Graanul JV. For the year ended December 31, 2013, the Rentech/Graanul JV’s loss, which is shown as equity in loss of investee in the consolidated statements of operations, was approximately $0.2 million.
	The Company is developing two facilities in Eastern Canada to produce and sell wood pellets for use as renewable fuel to produce electricity. See Note 8 — Property, Plant and Equipment for a description of the two facilities and Note 13 — Commitments and Contingencies for major contracts and commitments for this business segment.
	The Company decided to exit the energy technologies business as a direct result of the high projected cost to develop the technologies and deploy them at commercial scale, in combination with the lower projected returns on such investments as energy prices in the United States dropped due to the advent of hydraulic fracturing and other factors, as well as the failure of, and reductions in, government incentives and regulations intended to support the development of alternative energy, particularly within the United States. See Note 22 — Subsequent Events regarding the proposed sale of the Company’s energy technologies.
	Change in Fiscal Year End and Basis of Presentation
	On February 1, 2012, the Company changed its fiscal year end from September 30 to December 31. References to any of the Company’s calendar years mean the twelve-month period ended December 31 of that calendar year. References to the Company’s fiscal year mean the fiscal year ended September 30, 2011. The statement of operations for the calendar year ended December 31, 2011 was derived by deducting the statement of operations for the three months ended December 31, 2010 from the statement of operations for the fiscal year ended September 30, 2011 and then adding the statement of operations for the three months ended December 31, 2011. The statements of operations for calendar year ended December 31, 2011 and the three months ended December 31, 2010, while not required, are presented for comparison purposes. Financial information in these notes with respect to calendar year 2011 and the three months ended December 31, 2010 is unaudited.
	The Company identified errors that impacted product sales and cost of sales for the year ended December 31, 2012. The impact of correcting these errors in 2013 increased operating income by $0.2 million. Management does not believe the impact of these errors was material to 2013 or any previously issued financial statements.
	Discontinued Operations
	Activity related to discontinued operations in 2012 represents final settlement of activity and balances related to a business discontinued in 2005.

Summary_of_Certain_Significant

Summary of Certain Significant Accounting Policies

12 Months Ended

Dec. 31, 2013

Accounting Policies [Abstract]

Summary of Certain Significant Accounting Policies

Note 2 — Summary of Certain Significant Accounting Policies

Principles of Consolidation

The accompanying consolidated financial statements include the accounts of the Company, its wholly owned subsidiaries and all subsidiaries in which the Company directly or indirectly owns a controlling financial interest. All significant intercompany accounts and transactions have been eliminated in consolidation.

Subsequent Events

The Company has evaluated events occurring between December 31, 2013 and the date of these financial statements to ensure that such events are properly reflected in these statements.

Use of Estimates

The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America 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.

Revenue Recognition

East Dubuque and Pasadena Policy

Product sales revenues from the Fertilizer Facilities are recognized when customers take ownership upon shipment from the Fertilizer Facilities, the East Dubuque Facility’s leased facility or the Pasadena Facility’s distributors’ facilities and (i) assumes risk of loss, (ii) there are no uncertainties regarding customer acceptance, (iii) collection of the related receivable is probable, (iv) persuasive evidence of a sale arrangement exists and (v) the sales price is fixed or determinable. Management assesses the business environment, the customer’s financial condition, historical collection experience, accounts receivable aging and customer disputes to determine whether collectability is reasonably assured. If collectability is not considered reasonably assured at the time of sale, the Company does not recognize revenue until collection occurs.

Natural gas, though not purchased for the purpose of resale, is occasionally sold by the East Dubuque Facility when contracted quantities received are in excess of production and storage capacities, in which case the sales price is recorded in product sales and the related cost is recorded in cost of sales. Natural gas sales were approximately $3.4 million, $1.1 million and $0.1 million for 2013, 2012 and 2011, respectively.

East Dubuque Contracts

On April 26, 2006, the Company’s subsidiary, Rentech Development Corporation (“RDC”), entered into a Distribution Agreement (the “Distribution Agreement”) with Royster-Clark Resources, LLC, who subsequently assigned the agreement to Agrium U.S.A., Inc. (“Agrium”), and RDC similarly assigned the agreement to REMC, prior to its conversion into RNLLC. The Distribution Agreement is for a 10 year period, subject to renewal options. Pursuant to the Distribution Agreement, Agrium is obligated to use commercially reasonable efforts to promote the sale of, and solicit and secure orders from its customers for nitrogen fertilizer products manufactured at the East Dubuque Facility, and to purchase from RNLLC nitrogen fertilizer products manufactured at the facility for prices to be negotiated in good faith from time to time. Under the Distribution Agreement, Agrium is appointed as the exclusive distributor for the sale, purchase and resale of nitrogen products manufactured at the East Dubuque Facility. Sale terms are negotiated and approved by RNLLC. Agrium bears the credit risk on products sold through Agrium pursuant to the Distribution Agreement. If an agreement is not reached on the terms and conditions of any proposed Agrium sale transaction, RNLLC has the right to sell to third parties provided the sale is on the same timetable and volumes and at a price not lower than the one proposed by Agrium. For the calendar years ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011, the Distribution Agreement accounted for 79%, 83%, 92% and 83%, respectively, of net revenues from product sales for the East Dubuque Facility. Receivables from Agrium accounted for 84% and 73% of the total accounts receivable balance of the East Dubuque Facility as of December 31, 2013 and 2012, respectively. RNLLC negotiates sales with other customers and these transactions are not subject to the terms of the Distribution Agreement.

Under the Distribution Agreement, the East Dubuque Facility pays commissions to Agrium not to exceed $5 million during each contract year on applicable gross sales during the first 10 years of the agreement. The commission rate was 2% during the first year of the agreement and increased by 1% on each anniversary date of the agreement up to the current maximum rate of 5%. For the calendar years ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011, the effective commission rate associated with sales under the Distribution Agreement was 3.6%, 2.7%, 2.6% and 4.3%, respectively. The commission expense was recorded in cost of sales for all periods.

Pasadena Contracts

RNPLLC sells substantially all of its products through marketing and distribution agreements. Pursuant to an exclusive marketing agreement RNPLLC has entered into with Interoceanic Corporation (“IOC”), IOC has the exclusive right and obligation to market and sell all of the Pasadena Facility’s ammonium sulfate product. Under the marketing agreement, IOC is required to use commercially reasonable efforts to market the product to obtain the most advantageous price. RNPLLC compensates IOC for transportation and storage costs relating to the ammonium sulfate product it markets through the pricing structure under the marketing agreement. The marketing agreement has a term that ends December 31, 2016, but automatically renews for subsequent one-year periods (unless either party delivers a termination notice to the other party at least 210 days prior to an automatic renewal). The marketing agreement may be terminated prior to its stated term for specified causes. During the calendar year ended December 31, 2013 and the period beginning November 1, 2012 through December 31, 2012, the marketing agreement with IOC accounted for 100% of the Pasadena Facility’s revenues from the sale of ammonium sulfate. In addition, RNPLLC has an arrangement with IOC that permits RNPLLC to store 59,500 tons of ammonium sulfate at IOC-controlled terminals, which are located near end customers of the Pasadena Facility’s ammonium sulfate. This arrangement currently is not governed by a written contract. RNPLLC also has marketing and distribution agreements to sell other products that automatically renew for successive one year periods.

Fulghum Fibres Contracts

Tolling and Offtake Arrangements – The Company has certain wood chip processing, wood yard operation and wood pellet agreements, which contain embedded leases for accounting purposes. This generally occurs when the agreement designates a specific chip mill or pellet plant in which the buyer purchases substantially all of the output and does not otherwise meet a fixed price per unit of output exception. The Company determined that these are operating leases.

A tolling and offtake agreement that does not contain a lease may be classified as a derivative subject to a normal purchase and sale exception, in which case the agreement is classified as an executory contract and accounted for on an accrual basis. Tolling and offtake agreements, and components of these agreements that do not meet the above classifications, are accounted for on an accrual basis.

For sales which are not accounted for as operating leases as described above, the Company recognizes revenue at the time the service is provided or when customers take ownership upon shipment from the facilities of the chips or pellets and assumes risk of loss, collection of the related receivable is probable, persuasive evidence of a sale arrangement exists and the sales price is fixed or determinable. Revenues associated with tolling arrangements are included in service revenues and sales of product under offtake agreements are included in product sales in our consolidated statements of operations.

Deferred Revenue

A significant portion of the revenue recognized during any period may be related to product prepayment contracts or products stored at IOC facilities, for which cash was collected during an earlier period, with the result that a significant portion of revenue recognized during a period may not generate cash receipts during that period. As of December 31, 2013 and 2012, deferred revenue was approximately $21.6 million and $29.7 million, respectively. At the East Dubuque Facility, the Company records a liability for deferred revenue to the extent that payment has been received under product prepayment contracts, which create obligations for delivery of product within a specified period of time in the future. The terms of these product prepayment contracts require payment in advance of delivery. At the Pasadena Facility, IOC pre-pays a portion of the sales price for shipments received into its storage facilities which is recorded as deferred revenue. The Company recognizes revenue related to the product prepayment contracts or products stored at IOC facilities and relieves the liability for deferred revenue when products are shipped (including shipments to end customers from IOC facilities).

Cost of Sales

Cost of sales are comprised of manufacturing costs related to the Company’s fertilizer products and processing costs for services. Cost of sales expenses include direct materials (such as natural gas, ammonia, sulfur and sulfuric acid), direct labor, indirect labor, employee fringe benefits, depreciation on plant machinery, electricity and other costs, including shipping and handling charges incurred to transport products sold.

The Company enters into short-term contracts to purchase physical supplies of natural gas in fixed quantities at both fixed and indexed prices. The Company anticipates that it will physically receive the contract quantities and use them in the production of fertilizer. The Company believes it is probable that the counterparties will fulfill their contractual obligations when executing these contracts. Natural gas purchases, including the cost of transportation to the East Dubuque Facility, are recorded at the point of delivery into the pipeline system.

Accounting for 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 Company’s balance sheet 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 Company 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 from operating activities.

The Company elects the normal purchase normal sale exemption for the Company’s commodity-based derivative instruments. As such, the Company does not recognize the unrealized gains or losses related to these derivative instruments in its consolidated financial statements. For interest rate swaps, RNP did not use hedge accounting; however, RNP reflected the instruments at fair value and any change in value was recorded in other expense, net on the consolidated statement of operations. RNP terminated the interest rate swaps in calendar year 2013.

Research and Development Expenses

Research and development expenses included direct materials, direct labor, indirect labor, fringe benefits, third-party consultants and other costs incurred to develop and refine certain technologies employed in the Company’s energy technologies segment. These costs are expensed as incurred.

Cash

The Company has checking and savings accounts with major financial institutions. At times balances with these institutions may be in excess of federally insured limits.

Accounts and Other Receivables

Trade receivables are recorded at net realizable value. The allowance for doubtful accounts reflects the Company’s best estimate of probable losses inherent in the accounts receivable balance. The Company determines the allowance based on known troubled accounts, historical experience, and other currently available evidence. The Company reviews its allowance for doubtful accounts quarterly. Past due balances over 90 days and over a specified amount are reviewed individually for collectibility. Account balances are charged off against the allowance after all means of collection have been exhausted and the potential for recovery is considered remote.

At December 31, 2013, the Company has recorded an insurance receivable of approximately $1.7 million for losses incurred at a November 2013 fire at the East Dubuque Facility. The receivable is not in dispute, and recovery is probable due to a legally enforceable insurance policy.

Inventories

Inventories consist of raw materials and finished goods within the Company’s East Dubuque, Pasadena and Fulghum Fibres segments. The primary raw material used by the East Dubuque Facility in the production of its nitrogen products is natural gas. The primary raw materials used by the Pasadena Facility in the production of its products are ammonia and sulfur. Raw materials also include certain chemicals used in the manufacturing process. Fulghum Fibres’ raw materials inventory consists of purchased roundwood to be chipped at its South American mills. Finished goods include the products stored at the Fertilizer Facilities that are ready for shipment along with any inventory that may be stored at remote facilities, and Fulghum Fibres’ processed wood chips. The Company allocates fixed production overhead costs to inventory based on the normal capacity of its production facilities and unallocated overhead costs are recognized as expense in the period incurred. At December 31, 2013 and 2012, inventories on the consolidated balance sheets included depreciation of approximately $1.2 million and $1.0 million, respectively.

Inventories are stated at the lower of cost or estimated net realizable value. The cost of inventories is determined using the first-in first-out method. The estimated net realizable value is based on customer orders, market trends and historical pricing. On at least a quarterly basis, the Company performs an analysis of its inventory balances to determine if the carrying amount of inventories exceeds its net realizable value. If the carrying amount exceeds the estimated net realizable value, the carrying amount is reduced to the estimated net realizable value.

Property, Plant and Equipment

Property, plant and equipment is stated at cost less accumulated depreciation. Depreciation expense is calculated using the straight-line method over the estimated useful lives of the assets, except for platinum catalyst, as follows:

Type of Asset

Estimated Useful Life

Building and building improvements

4-40 years

Land improvements

5-20 years

Machinery and equipment

7-22 years

Furniture, fixtures and office equipment

3-10 years

Computer equipment and software

2-5 years

Vehicles

2-15 years

Leasehold improvements

Useful life or remaining lease term whichever is shorter

Ammonia catalyst

3-10 years

Platinum catalyst

Based on units of production

Expenditures during turnarounds or at other times for improving, replacing or adding to RNP’s assets are capitalized. Expenditures for the acquisition, construction or development of new assets to maintain RNP’s operating capacity, or to comply with environmental, health, safety or other regulations, are also capitalized. Costs of general maintenance and repairs are expensed.

When property, plant and equipment is retired or otherwise disposed of, the asset and accumulated depreciation are removed from the accounts and the resulting gain or loss is reflected in operating expenses.

Spare parts are maintained by the Fertilizer Facilities to reduce the length of possible interruptions in plant operations from an infrastructure breakdown at the Fertilizer Facilities. The spare parts may be held for use for years before the spare parts are used. As a result, they are capitalized as a fixed asset at cost. When spare parts are utilized, the book values of the assets are charged to earnings as a cost of production. Periodically, the spare parts are evaluated for obsolescence and impairment and if the value of the spare parts is impaired, it is charged against earnings.

Long-lived assets, construction in progress and identifiable intangible assets are reviewed whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. If the expected future cash flow from the use of the asset and its eventual disposition is less than the carrying amount of the asset, an impairment loss is recognized and measured using the asset’s fair value.

The Company capitalizes certain direct development costs associated with internal-use software, including external direct costs of material and services, and payroll costs for employees devoting time to software implementation projects. Costs incurred during the preliminary project stage, as well as maintenance and training costs, are expensed as incurred.

The Company has recorded asset retirement obligations (“AROs”) related to future costs associated with (i) the removal of contaminated material at the former phosphorous plant at the Pasadena Facility and handling, (ii) disposal of asbestos at the East Dubuque Facility and (iii) removal of machinery and equipment at Fulghum mills on leased property. The fair value of a liability for an ARO is recorded in the period in which it is incurred and the cost of such liability increases the carrying amount of the related long-lived asset by the same amount. The liability is accreted each period through charges to operating expense and the capitalized cost is depreciated over the remaining useful life of the asset. The liability at December 31, 2013 and 2012 was approximately $3.0 million and $3.1 million.

Construction in Progress

The Company tracks project development costs and capitalizes those costs after a project has completed the scoping phase and enters the feasibility phase. The most significant projects under construction are the Wawa and Atikokan facilities at December 31, 2013. The Company also capitalizes costs for improvements to the existing machinery and equipment at the Fertilizer Facilities and certain costs associated with the Company’s information technology initiatives. Interest incurred on development and construction projects is capitalized until construction is complete. The Company does not depreciate construction in progress costs until the underlying assets are placed into service.

Property Held for Sale

Property held for sale represents long lived assets that management has committed to a plan to sell and has taken actions to do so and the sale is expected within the next year. During the calendar year ended December 31, 2013, the Company reclassified the PDU from property, plant and equipment to property held for sale on its consolidated balance sheet. The PDU is available for immediate sale and is being actively marketed for sale. During the year ended December 31, 2012, the Company reflected the property located in Natchez, Mississippi (the “Natchez Property”) as held for sale and on August 15, 2013, the Company sold it for net proceeds of approximately $8.6 million. This transaction resulted in a gain on sale of approximately $6.3 million. As of December 31, 2013, property held for sale only includes the PDU. Both properties were included in the energy technologies segment.

Acquisition Method of Accounting

The Company accounts for business combinations using the acquisition method of accounting, which requires, among other things, that assets acquired, liabilities assumed and earn-out consideration be recognized at their fair values as of the acquisition date. The Company has recognized goodwill and intangibles related to its acquisitions as described in Note 3 — Fulghum Acquisition and Note 4 — Agrifos Acquisition. The earn-out consideration will be measured at each reporting date with changes in its fair value recognized in the consolidated statements of operations.

Goodwill

Goodwill represents the excess of the purchase price over the fair value of identifiable net assets acquired in a business acquisition. The Company tests goodwill assets for impairment annually, or more often if an event or circumstance indicates that an impairment may have occurred. The analysis of the potential impairment of goodwill is a two step process. Step one of the impairment test consists of comparing the fair value of the reporting unit with the aggregate carrying value, including goodwill. If the carrying value of a reporting unit exceeds the reporting unit’s fair value, step two must be performed to determine the amount, if any, of the goodwill impairment. Step one of the goodwill impairment test involves a high degree of judgment and consists of a comparison of the fair value of a reporting unit with its book value. The fair value of the Pasadena and Fulghum reporting units is based upon various assumptions and is based on the discounted cash flows that the business can be expected to generate in the future (the “Income Approach”). The Income Approach valuation method requires the Company to make projections of revenue and operating costs over a multi-year period. Additionally, the Company made an estimate of a weighted average cost of capital that a market participant would use as a discount rate.

If the fair value of the reporting unit is less than its carrying value, step two of the impairment test is performed. Step two of the goodwill impairment test consists of comparing the implied fair value of the reporting unit’s goodwill against the carrying value of the goodwill. Determining the implied fair value of goodwill requires the valuation of a reporting unit’s identifiable tangible and intangible assets and liabilities as if the reporting unit had been acquired in a business combination on the testing date. The valuation of assets and liabilities in step two is performed only for purposes of assessing goodwill for impairment. See Note 9 —Goodwill.

Intangible Assets

Intangible assets arose in conjunction with the Fulghum Acquisition and Agrifos Acquisition (See Note 3 — Fulghum Acquisition and Note 4 — Agrifos Acquisition). Fulghum’s intangible assets consist of trade names and processing agreements to provide high-quality wood chipping and wood yard operations services to its customers. Acquired trade names were assessed as indefinite lived assets because there is no foreseeable limit on the period of time over which they are expected to contribute cash flows. Acquired trade names are not amortized but are subject to an annual test for impairment and in between annual tests when events or circumstances indicate that the carrying value may not be recoverable.

Intangible assets consist of the following at December 31, 2013 and 2012 (amounts in thousands):

2013

2012

Average Life

Trade names

5,496

—

Indefinite

Wood chip processing agreements

29,765

—

17-Jan

Off-take contract

2,811

—

Technologies to produce fertilizers

23,680

Fertilizer marketing agreements

3,088

1.5

Intangibles, gross

64,840

26,768

Less: accumulated amortization

(5,110

)

(583

)

Intangibles, net

59,730

26,185

The amortization of the assets will result in amortization expense of approximately $4.3 million in 2014 and $4.4 million for each of the next four years thereafter.

We also have unfavorable processing agreements in the amount of approximately $4.1 million, which are included in other liabilities both current and long term. These agreements along with processing agreements recorded in intangible assets are amortized over the economic benefit.

Costs for patents on intellectual property are capitalized and amortized using the straight-line method over the remaining lives of the patents. The cost of patents was $11.9 million with accumulated amortization of $2.0 million at December 31, 2011. The Company recorded $1.4 million, $0.3 million and $1.0 million in amortization expense for the calendar year ended December 31, 2012, the three months ended December 31, 2011, and the fiscal year ended September 30, 2011, respectively. See Note 10 — Impairments.

Income Taxes

The Company accounts for income taxes under the liability method, which requires an entity to recognize deferred tax assets and liabilities for temporary differences. Temporary differences are differences between the tax basis of assets and liabilities and their reported amounts in the financial statements that will result in taxable or deductible amounts in future years. An income tax valuation allowance has been established to reduce the Company’s deferred tax asset to the amount that is expected to be realized in the future.

The Company recognizes in its consolidated financial statements only those tax positions that are “more-likely-than-not” of being sustained, based on the technical merits of the position. The Company performs a comprehensive review of its material tax positions in accordance with the applicable guidance.

Net Income (Loss) Per Common Share Allocated To Rentech

Basic net income (loss) per common share allocated to Rentech is calculated by dividing net income (loss) allocated to Rentech by the weighted average number of common shares outstanding for the period. Diluted net income (loss) per common share allocated to Rentech is calculated by dividing net income (loss) allocated to Rentech by the weighted average number of common shares outstanding plus the dilutive effect, calculated using the “treasury stock” method for the unvested restricted stock units, outstanding stock options and warrants and using the “if converted” method for the convertible debt if their inclusion would not have been anti-dilutive.

Comprehensive Income (Loss)

Comprehensive income (loss) includes all changes in stockholders’ equity during the period from non-owner sources. To date, accumulated other comprehensive income (loss) is primarily comprised of adjustments to the defined benefit pension plans and the postretirement benefit plans and foreign currency translation.

Variable Interest Entities

The Company may enter into joint ventures or make investments with business partners that support its underlying business strategy and provide it the ability to enter new markets. In certain instances, an entity in which the Company may make an investment may qualify as a variable interest entity (“VIE”). If the Company determines that it is the primary beneficiary of an entity, it must consolidate that entity’s operations. Determination of the primary beneficiary focuses on determining which variable interest holder has the power to direct the most significant activities of the VIE. The Company has currently no VIEs.

Recent Accounting Pronouncements

In January 2013, the Financial Accounting Standards Board (the “FASB”) issued guidance requiring companies to disclose information about financial instruments that have been offset on the balance sheet or subject to an enforceable master netting agreement, irrespective of whether they have been offset, and related arrangements to enable users of a company’s financial statements to understand the effect of those arrangements on the company’s financial position. Companies will be required to provide both net (offset amounts) and gross information in the notes to the financial statements for relevant assets and liabilities that are offset. This guidance is effective for interim and annual periods beginning on or after January 1, 2013 and requires retrospective application, and thus became effective for the Company’s interim period beginning on January 1, 2013. The adoption of this guidance did not have any impact on the Company’s consolidated financial position, results of operations or disclosures.

In February 2013, the FASB issued guidance that requires a company to disclose information about amounts reclassified out of accumulated other comprehensive income and their corresponding effect on net income. This guidance is effective for interim and annual periods beginning after December 15, 2012, and thus became effective for the Company’s interim period beginning on January 1, 2013. The adoption of this guidance did not have a material impact on the Company’s consolidated financial position, results of operations or disclosures.

In July 2013, the FASB issued guidance as to when an unrecognized tax benefit should be classified as a reduction of a deferred tax asset or when it should be classified as a liability in the consolidated balance sheet. This guidance is effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. It is effective for the Company’s interim period beginning on January 1, 2014. The adoption of this guidance is not expected to have a material impact on the Company’s consolidated financial position, results of operations or disclosures.

Acquisition

Acquisition	12 Months Ended
Acquisition	Dec. 31, 2013
Acquisition	'
	Note 3 — Fulghum Acquisition
	On May 1, 2013, the Company acquired all of the capital stock of Fulghum. The preliminary purchase price consisted of approximately $64.2 million of cash, including approximately $3.3 million used to retire certain debt of Fulghum at closing. The amount of the purchase price is subject to certain potential post-closing adjustments set forth in the stock purchase agreement.
	This business combination has been accounted for using the acquisition method of accounting, which requires, among other things, that assets acquired and liabilities assumed be recognized at their fair values as of the acquisition date.
	The Company’s preliminary purchase price allocation as of May 1, 2013 is as follows (amounts in thousands):


	Cash		$	10,137
	Accounts receivable			3,936
	Inventories			2,389
	Prepaid expenses and other current assets			952
	Other receivables, net			5,435
	Property, plant and equipment			94,382
	Intangible assets (Trade name - $5,496 and Processing agreements - $29,765)			35,261
	Goodwill			29,932
	Other assets			2,974
	Accounts payable			(6,547	)
	Accrued liabilities			(5,823	)
	Customer deposits			(1,059	)
	Asset retirement obligation			(178	)
	Credit facility and loans			(61,865	)
	Unfavorable processing agreements			(6,496	)
	Deferred income taxes			(35,262	)
	Noncontrolling interests			(4,000	)

	Total preliminary purchase price		$	64,168

	Long-term deferred tax liabilities and other tax liabilities result from identifiable tangible and intangible assets fair value adjustments. These adjustments create excess book basis over the tax basis which is multiplied by the statutory tax rate for the jurisdiction in which the deferred taxes exist. As part of purchase accounting for Fulghum, we recorded additional deferred tax liabilities of approximately $15.8 million attributable to identifiable tangible and intangible assets.

	The final purchase price and the allocation thereof will not be known until the final working capital adjustments are performed and a review of various tax issues is completed.
	The operations of Fulghum are included in the consolidated statement of operations effective May 1, 2013. During the calendar year ended December 31, 2013, the Company recorded revenue and net income related to Fulghum of approximately $63.0 million and $7.0 million, respectively. Acquisition related costs for this acquisition totaled approximately $1.5 million and have been included in the consolidated statements of operations within selling, general and administrative expense.
Agrifos [Member]	'
Acquisition	'
	Note 4 — Agrifos Acquisition
	On November 1, 2012, the Company acquired all of the membership interest of Agrifos. The purchase price for Agrifos and its subsidiaries consisted of an initial purchase price of $136.3 million in cash, less working capital adjustments, and $20.0 million in common units representing limited partnership interests in RNP (the “Common Units”), which reduced the Company’s ownership interest in RNP at the time from 60.8% to 59.9%, as well as potential earn-out consideration of up to $50.0 million to be paid in Common Units or cash at RNP’s option based on the amount by which the two-year Adjusted EBITDA, as defined in the Purchase Agreement, of the Pasadena Facility exceeds certain thresholds. Among other terms, the Seller is required to indemnify us for a period of six years after the closing for certain environmental matters relating to the Pasadena Facility, which indemnification obligations are subject to important limitations including a deductible and an overall cap. We deposited with an escrow agent in several escrow accounts a portion of the initial consideration consisting of an aggregate of $7.25 million in cash, and 323,276 Common Units, representing a value of $12.0 million, which amounts may be used to satisfy certain indemnity claims upon the occurrence of certain events. Any earn-out consideration would be paid after April 30, 2015 and the completion of the relevant calculations in either common units or cash at RNP’s option.
	This business combination has been accounted for using the acquisition method of accounting, which requires, among other things, that most assets acquired, liabilities assumed and earn-out consideration be recognized at their fair values as of the acquisition date.
	The purchase price consisted of the following (amounts in thousands):


	Cash (through borrowings under a previous credit agreement) less working capital adjustments		$	136,308
	Fair market value of 538,793 Common Units issued			20,000
	Estimate of potential earn-out consideration(1)			4,920

	Total purchase price		$	161,228


	-1	The amount of earn-out consideration reflected in the table above reflects the Company’s estimate, as of November 1, 2012, of the amount of the earn-out consideration RNP will be required to pay pursuant to the Purchase Agreement, as defined in Note 6 — Fair Value. The earn-out consideration will be measured at each reporting date with changes in its fair value recognized in the consolidated statements of operations. As of December 31, 2013, the fair value of the potential earn-out consideration was $0.

	RNP’s final purchase price allocation as of November 1, 2012 is as follows (amounts in thousands):


	Cash		$	2,622
	Accounts receivable			3,204
	Inventories			30,373
	Prepaid expenses and other current assets			566
	Property, plant and equipment			68,688
	Construction in progress			7,011
	Intangible assets (Technology—$23,680 and Marketing Agreement—$3,088)			26,768
	Goodwill			57,231
	Other assets			73
	Accounts payable			(10,638	)
	Accrued liabilities			(6,640	)
	Customer deposits			(13,301	)
	Asset retirement obligation			(2,776	)
	Other long-term liabilities			(1,953	)

	Total purchase price		$	161,228

	During the calendar year ended December 31, 2013, RNP and the Seller finalized the working capital adjustments which resulted in an increase in the preliminary purchase price of approximately $0.3 million. The working capital adjustments receivable was recorded separately from the purchase price allocation shown above. The finalization and recording of the cash receipt resulted in cash increasing by approximately $2.2 million and other receivables decreasing by approximately $2.5 million. During the calendar year ended December 31, 2013, RNP recognized adjustments to the preliminary purchase price allocation with an increase in fair value to goodwill of approximately $0.6 million and accrued liabilities of approximately $0.3 million.
	The operations of Agrifos are included in the consolidated statement of operations effective November 1, 2012. During the calendar year ended December 31, 2012, the Company recorded revenue and net loss related to Agrifos of approximately $37.4 million and $2.6 million, respectively. Acquisition related costs for this acquisition totaled approximately $4.1 million for the calendar year ended December 31, 2012 and have been included in the consolidated statements of operations within selling, general and administrative expense.

Pro_Forma_Information

Pro Forma Information	12 Months Ended
Pro Forma Information	Dec. 31, 2013
Text Block [Abstract]	'
Pro Forma Information	'
	Note 5 — Pro Forma Information
	The unaudited pro forma information has been prepared as if the Fulghum Acquisition and the Agrifos Acquisition, as defined in Note 3 — Fulghum Acquisition and Note 4 — Agrifos Acquisition, had taken place on January 1, 2012. The unaudited pro forma information is not necessarily indicative of the results that the Company would have achieved had the transactions actually taken place on January 1, 2012, and the unaudited pro forma information does not purport to be indicative of future financial operating results.


			For the Calendar Year Ended
			December 31, 2013
			As Reported			Pro Forma			Pro Forma
			As Reported			Adjustments			Pro Forma
			(in thousands)
	Revenues		$	374,855		$	36,683		$	411,538
	Net income (loss)(1)		$	38		$	(27,332	)	$	(27,294	)
	Net loss attributable to Rentech		$	(1,532	)	$	(27,467	)	$	(28,999	)
	Basic net loss per common share attributable to Rentech		$	(0.01	)	$	(0.12	)	$	(0.13	)
	Diluted net loss per common share attributable to Rentech		$	(0.01	)	$	(0.12	)	$	(0.13	)



			For the Calendar Year Ended
			December 31, 2012
			As Reported			Pro Forma			Pro Forma
			As Reported			Adjustments			Pro Forma
			(in thousands)
	Revenues		$	261,925		$	226,346		$	488,271
	Net income(1)		$	27,687		$	29,137		$	56,824
	Net income (loss) attributable to Rentech		$	(14,000	)	$	29,573		$	15,573
	Basic net income (loss) per common share attributable to Rentech		$	(0.06	)	$	0.13		$	0.07
	Diluted net income (loss) per common share attributable to Rentech		$	(0.06	)	$	0.13		$	0.07

	-1	As discussed in Note 18 — Income Taxes, during the calendar year ended December 31, 2013, there was a release of a valuation allowance resulting from recording deferred tax liabilities from the Fulghum Acquisition. Since the pro forma information is presented as if the transaction had taken place on January 1, 2012, the release of the valuation allowance is included in the pro forma results for the calendar year ended December 31, 2012 and excluded from the pro forma results for the calendar year ended December 31, 2013.

Fair_Value

Fair Value	12 Months Ended
Fair Value	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value	'
	Note 6 — 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 at the measurement date in a principal or most advantageous market. Fair value is a market-based measurement that is determined based on inputs, which refer broadly to assumptions that market participants use in pricing assets or liabilities. These inputs can be readily observable, market corroborated or generally unobservable inputs. The Company makes certain assumptions it believes that market participants would use in pricing assets or liabilities, including assumptions about risk, and the risks inherent in the inputs to valuation techniques. Credit risk of the Company and its counterparties is incorporated in the valuation of assets and liabilities. The Company believes it uses valuation techniques that maximize the use of observable market-based inputs and minimize the use of unobservable inputs.
	A fair value hierarchy has been established that prioritizes the inputs to valuation techniques used to measure fair value in three broad levels. The fair value hierarchy gives the highest priority to quoted prices (unadjusted) in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). In some cases, the inputs used to measure fair value might fall in different levels of the fair value hierarchy. All assets and liabilities are required to be classified in their entirety based on the lowest level of input that is significant to the fair value measurement in its entirety. Assessing the significance of a particular input may require judgment considering factors specific to the asset or liability, and may affect the valuation of the asset or liability and its placement within the fair value hierarchy. The Company classifies fair value balances based on the fair value hierarchy, defined as follows:

		•		Level 1 — Consists of unadjusted quoted prices in active markets for identical assets or liabilities that the Company 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, deposits, other current assets, accounts payable, accrued liabilities and other current liabilities are assumed to approximate carrying value since they are short term and can be settled on demand.

	The following table presents the financial instruments that require fair value disclosure as of December 31, 2013.


			Fair Value								Carrying
			Fair Value								Value
			(in thousands)
			Level 1			Level 2			Level 3
	Liabilities
	RNP Notes		$	318,400		$	—		$	—	$	320,000
	Fulghum debt			—			45,970			—		47,452
	RNHI Revolving Loan			—			50,000			—		50,000
	QS Construction Facility			—			4,527			—		4,527
	Earn-out consideration			—			—			1,544		1,544
	The following table presents the financial instruments that require fair value disclosure as of December 31, 2012.


			Fair Value								Carrying
			Fair Value								Value
			(in thousands)
			Level 1			Level 2			Level 3
	Liabilities
	Credit facilities and term loan		$	—		$	193,290		$	—	$	193,290
	Interest rate swaps			—			929			—		929
	Earn-out consideration			—			—			4,920		4,920
	RNP Notes
	The RNP Notes, as defined in Note 11 — Debt, are deemed to be Level 1 financial instruments because there was an active market for such debt. The fair value of such debt had been determined based on market prices.
	Fulghum Debt
	Fulghum debt, as defined in Note 11 — Debt, is deemed to be Level 2 financial instruments because the measurement is based on observable market data. The fair value was determined by management using an independent, third party valuation company.
	RNHI Revolving Loan
	The RNHI Revolving Loan, as defined in Note 11 — Debt, 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 RNHI Revolving Loan approximates the fair value of such loan as of December 31, 2013 because of the floating nature of the interest rate and the fact that the Company’s credit worthiness has not changed since the loan was issued.
	QS Construction Facility
	The QS Construction Facility, as defined in Note 11 — Debt, is deemed to be a Level 2 financial instrument because the measurement is based on observable market data. To determine the fair value, the Company reviewed the current market interest rates of similar borrowing arrangements. It was concluded that the carrying value of the QS Construction Facility approximates the fair value of the obligation at December 31, 2013 because of the floating nature of the interest rate and the fact that the Company’s credit worthiness has not changed since the QS Construction Facility was established.
	Credit Facilities and Term Loan
	The credit facilities and term loan were deemed to be Level 2 financial instruments because the measurement was based on observable market data. RNP used part of the proceeds from the offering of the RNP Notes to repay in full and terminate the Second 2012 Credit Agreement, as defined in Note 11 — Debt, and related interest rate swaps.

	Interest Rate Swaps
	In 2012, RNLLC entered into two forward starting interest rate swaps in notional amounts which covered a portion of its outstanding borrowings. The interest rate swaps were deemed to be Level 2 financial instruments because the measurements were based on observable market data. RNP used a standard swap contract valuation method to value its interest rate derivatives, and the inputs it uses for present value discounting included forward one-month and three-month LIBOR rates, risk-free interest rates and an estimate of credit risk. The change in fair value was recorded in other expense, net on the consolidated statement of operations. The realized loss represents the cash payments required under the interest rate swaps.
	Net loss on interest rate swaps:


			For the Calendar Years Ended
			December 31,
			2013			2012
			(in thousands)
	Realized loss		$	(24	)	$	(22	)
	Unrealized gain (loss)			17			(929	)

	Total net loss on interest rate swaps		$	(7	)	$	(951	)

	During the calendar year ended December 31, 2013, RNP paid approximately $0.9 million to terminate the interest rate swaps as described above
	Earn-out Consideration
	The earn-out consideration relates to potential additional consideration the Company may be required to pay under the Purchase Agreement relating to the Agrifos Acquisition. The earn-out consideration related to the Agrifos Acquisition is deemed to be a Level 3 financial instrument because the measurement is based on unobservable inputs. The fair value of earn-out consideration was determined based on the Company’s analysis of various scenarios involving the achievement of certain levels of Adjusted EBITDA, as defined in the Purchase Agreement, over a two year period. The scenarios, which included a weighted probability factor, involved assumptions relating to the market prices of the Company’s products and feedstocks, as well as product profitability and production. The earn-out consideration will be measured at each reporting date with changes in its fair value recognized in the consolidated statements of operations. For the calendar year ended December 31, 2013, the fair value of the liability decreased by approximately $4.9 million. At December 31, 2013, the fair value of the potential earn-out consideration relating to the Agrifos Acquisition was $0. The decrease in fair value was a result of lower than expected profitability in 2013 due primarily to unfavorable weather and increased Chinese exports, as well as a reduced outlook for longer-term profitability due to reduced levels of nitrogen fertilizer prices. Due to an unusually wet spring, there was a shortened planting season which resulted in lower ammonium sulfate revenues during the calendar year ended December 31, 2013. In addition, significant volumes of urea were exported from China and this supply suppressed global urea and other nitrogen fertilizer prices.
At December 31, 2013, the earn-out consideration also includes approximately $1.5 million of potential earn-out consideration relating to the Atikokan Project, as defined in Note 8 — Property, Plant and Equipment. The fair value of earn-out consideration was determined based on the Company’s analysis of various scenarios involving the achievement of certain levels of EBITDA, as defined in the asset purchase agreement related to the Atikokan Project, over a ten year period. The scenarios, which included a weighted probability factor, involved assumptions relating to product profitability and production. The Company provided a loan to the sellers of approximately $0.9 million, which will be repayable from any earn-out consideration.
The levels within the fair value hierarchy at which the Company’s financial instruments have been evaluated have not changed for any of the Company’s financial instruments during the year ended December 31, 2013 and 2012.

Inventories

Inventories	12 Months Ended
Inventories	Dec. 31, 2013
Inventory Disclosure [Abstract]	'
Inventories	'
	Note 7 — Inventories
	Inventories consisted of the following:


		As of December 31,
		2013		2012
		(in thousands)
	Finished goods	$	27,638	$	21,756
	Raw materials		7,448		5,269
	Other		290		115

	Total inventory	$	35,376	$	27,140

	During the year ended December 31, 2013, the Company wrote down the value of the Pasadena Facility’s ammonium sulfate, sulfur and sulfuric acid inventory by $12.4 million to market value. This expense is reflected in cost of goods sold.

Property_Plant_and_Equipment

Property, Plant and Equipment	12 Months Ended
Property, Plant and Equipment	Dec. 31, 2013
Property Plant And Equipment [Abstract]	'
Property, Plant and Equipment	'
	Note 8 — Property, Plant and Equipment
	Property, plant and equipment consisted of the following:


		As of December 31,
		2013			2012
		(in thousands)
	Land and land improvements	$	26,149		$	22,988
	Buildings and building improvements		33,096			27,120
	Machinery and equipment and catalysts		334,645			135,636
	Furniture, fixtures and office equipment		1,137			1,085
	Computer equipment and computer software		7,977			5,981
	Vehicles		4,624			309
	Leasehold improvements		2,348			114
	Other		210			210

			410,186			193,443
	Less: accumulated depreciation		(75,526	)		(59,248	)

	Total property, plant and equipment, net	$	334,660		$	134,195

	Construction in progress consisted of the following:


		As of December 31,
		2013			2012
		(in thousands)
	East Dubuque Facility		2,195			52,435
	Pasadena Facility		31,335			8,512
	Fulghum Fibres		273			—
	Wawa Project		17,007			—
	Atikokan Project		8,458			—
	Other		868			470

	Total construction in progress	$	60,136		$	61,417

	The construction in progress balance at December 31, 2013 and 2012 includes approximately $0.8 million and $0.9 million of capitalized interest costs, respectively.

	On May 13, 2013, the Company acquired an idled oriented strand board processing mill from Weyerhaeuser Corporation in Wawa, Ontario, Canada for approximately $5.5 million. The Company is in the process of converting the mill to a wood pellet facility with the capacity to produce approximately 450,000 metric tons of wood pellets annually (the “Wawa Project”). Also, on June 7, 2013, the Company acquired a former particle board processing mill from Atikokan Renewable Fuels in Atikokan, Ontario, Canada. The Company is in the process of converting the mill to a wood pellet facility with the capacity to produce approximately 90,000 metric tons of wood pellets annually (the “Atikokan Project”). The initial purchase price for the Atikokan Project was approximately $3.8 million in cash plus potential earn-out consideration. The earn-out consideration will equal 7% of EBITDA of the Atikokan Project, as defined in the asset purchase agreement for the Atikokan Project, over a ten-year period. In addition to the initial purchase price, the Company provided a loan to the sellers of approximately $0.9 million, which is repayable from any earn-out consideration. Both the Wawa and Atikokan Projects were accounted for as asset purchases.

Goodwill

Goodwill	12 Months Ended
Goodwill	Dec. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract]	'
Goodwill	'
	Note 9 — Goodwill
	A reconciliation of the change in the carrying value of goodwill is as follows (in thousands):


	Balance at December 31, 2011	$	7,209
	Agrifos Acquisition		56,592
	Goodwill impairment – energy technologies		(7,209	)

	Balance at December 31, 2012	$	56,592
	Increase attributable to Pasadena		639
	Fulghum Acquisition		29,932
	Goodwill impairment – Pasadena		(30,029	)

	Balance at December 31, 2013	$	57,134

	The inventory impairment (see Note 7 — Inventories), negative gross margin and EBITDA in the calendar year ended December 31, 2013 and revised cash flow projections developed during the calendar year ended December 31, 2013 indicated that an impairment of the goodwill related to the Pasadena Facility was probable. See Note 10 — Impairments.
	The goodwill resulting from the Agrifos Acquisition is deductible for tax purposes, while the goodwill from the Fulghum Acquisition is not deductible for tax purposes.

Impairments

Impairments	12 Months Ended
	Dec. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract]	'
Impairments	'
	Note 10 — Impairments
	Calendar Year 2013
	During the calendar year, the Company incurred an approximate of $12.4 million write-down of ammonium sulfate, sulfur and sulfuric acid inventory to market value primarily due to lower market prices of ammonium sulfate. This expense is reflected in product cost of sales.
	Ammonium sulfate is the primary product of the Pasadena Facility. Results for the calendar year ended December 31, 2013 and our projections of future cash flow from the production and sale of this product are worse than the results originally projected in late 2012, when the Company acquired Agrifos. The expected results and cash flows as of 2012 were utilized to allocate the purchase price of the Agrifos Acquisition, as described in Note 4 – Agrifos Acquisition. The primary cause of the reduction in the estimated fair value of the Pasadena reporting unit is the decline in the cash flow expected to be generated from the sale of ammonium sulfate, compared to the expectations at the time of the acquisition. A major cause of the lower expected cash flows is a decline in the level of prices, and expected prices, for nitrogen fertilizer caused by, among other things, lower corn prices, poor weather conditions for fertilizer application throughout the United States in 2013 and increased supply of urea from China.

	Factors that affect cash flows include, but are not limited to, product prices; product transportation costs; product sales volumes; feedstock prices and availability; labor, maintenance, and other operating costs; required capital expenditures, and plant productivity. The Pasadena Facility generated negative EBITDA during the calendar year ended December 31, 2013. EBITDA is currently expected to be positive in 2014, but the current projection is well below the projection at the time of the acquisition, and is based on current and projected levels of prices for the products of, and inputs for, the Pasadena Facility. Current and projected prices for the products and inputs are below the levels at the time of the acquisition, yielding expectations for lower variable dollar margins per ton of product, even though percentage margins are expected to be consistent with those at the time of the acquisition because the prices of ammonium sulfate and its major raw materials have dropped by similar percentages. Lower dollar variable margins provide fewer dollars per ton sold to cover the fixed costs of the facility, resulting in reduced expectations of cash generated by the facility in a lower-price environment. In addition, the Pasadena Facility’s production has been lower than expected due to plant outages, and costs have been higher than expected due to higher maintenance expense.
	Based upon its analysis of the value of the Pasadena reporting unit using the Income Approach, the Company recorded an estimated impairment to goodwill of $30.0 million during the quarter ended September 30, 2013. During the fourth quarter the Company performed a “step 2” analysis of goodwill and determined no adjustment to the initial goodwill impairment charge was necessary. There are significant assumptions involved in determining a goodwill impairment charge, which includes discount rates, terminal growth rates, future prices of end products and raw materials, terminal values and production volumes. The various valuation methods used (income approach, replacement cost, market approach) are also weighted in determining fair market value. Changes to any of these assumptions could increase or decrease the fair value of the Pasadena reporting unit. At December 31, 2013 the fair value of the Pasadena reporting unit is essentially equal to its carrying value and any adverse change to the critical assumptions used to measure discounted cash flows could result in a diminution in fair value that may result in additional goodwill impairment charges. If gross margins on sales of products were to decline 5 percent from our expectations, an impairment charge of approximately $15.0 million would be required at December 31, 2013. If the discount rate were to increase by 100 basis points from our expectations, an impairment charge of approximately $16.5 million would be required at December 31, 2013.
	Calendar Year 2012
	The Company recorded intangibles related to the acquisition of two subsidiaries in its energy technology segment. The Company expected that these assets would be used in various development projects with unrelated parties. During the calendar year 2012 the Company determined, based upon the status of negotiations with third parties to fund development of projects using the technologies, that the likelihood of future cash flows were significantly diminished. The Company concluded, based on the high degree of uncertainty and low probability of completion of these projects, that the intangibles were impaired. As a result, the Company impaired the net book value of the intangibles in the amounts of approximately $16.0 million.
	Fiscal Year 2011
	Prior to the fourth quarter of the fiscal year ended September 30, 2011, the Company’s energy technologies segment had under development three projects for which it had capitalized certain construction work in process and other development costs. These projects included a biomass project in Rialto, California (the “Rialto Project”), a coal to liquid project at the Natchez Property (the “Natchez Project”) and a renewable energy project in Port St. Joe, Florida (the “Port St. Joe Project”).
	In the fourth quarter of the fiscal year ended September 30, 2011 the Company revised its strategy for commercialization of its alternative energy technologies to include reduced spending on research and development and pursuit of projects that are smaller and require less capital to be invested by Rentech than those recently under development by the Company. Rentech believed that project financing for the Rialto Project and the Port St. Joe Project would not be available, and the Company would not be moving forward with the projects. As a result, Rentech impaired capitalized costs associated with the projects in its consolidated financial statements for the period ending September 30, 2011. The loss on impairment for the Rialto Project represented the total costs of the project. The loss on impairment for the Port St. Joe Project represented the total costs of the project less the elimination of the contingent consideration liability of approximately $1.6 million.
	The Company has also concluded that project financing for its large Natchez Project was not available, and the Company’s future development efforts at its Natchez Property would focus on pursuing smaller projects that would use biomass or natural gas as feedstocks, not on the Natchez Project. As a result, Rentech impaired capitalized costs associated with its development of the Natchez Project in its consolidated financial statements for the period ending September 30, 2011. The loss on impairment for the Natchez Project represented the total costs of the project less the appraised value of the property, which the Company owns, of approximately $2.5 million.

	The financial impact recorded in the fiscal year ended September 30, 2011 statement of operations is as follows:


	Project	Loss on
		Impairments
		(in thousands)
	Rialto Project	$	(27,238	)
	Natchez Project		(26,645	)
	Port St. Joe Project		(4,806	)
	Miscellaneous		(53	)

	Total	$	(58,742	)

Debt

Debt	12 Months Ended
Debt	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Debt	'
	Note 11 — Debt
	The Company’s debt obligations at December 31, 2013 consist of $320.0 million of RNP Notes, $47.0 million of Fulghum debt and $50 million of RNHI Revolving loan as defined below. The Company’s debt obligations at December 31, 2012 consisted of approximately $193.3 million in outstanding advances under its Second 2012 Credit Agreement, as defined below. Debt premium, discount and issuance expenses incurred in connection with financing are deferred and amortized on a straight line basis.
	First 2012 Credit Agreement
	On February 28, 2012, RNLLC entered into a credit agreement (the “First 2012 Credit Agreement”). The First 2012 Credit Agreement consisted of (i) a $100.0 million multiple draw term loan, and (ii) a $35.0 million revolving facility.
	Second 2012 Credit Agreement
	On October 31, 2012, RNLLC, RNP, RNPLLC and certain subsidiaries of RNPLLC entered into a new credit agreement (the “Second 2012 Credit Agreement”). The Second 2012 Credit Agreement amended, restated and replaced the First 2012 Credit Agreement. The Second 2012 Credit Agreement consisted of (i) a $110.0 million multiple draw term loan (the “CapEx Facility”) to be used by RNP and its subsidiaries for expansion projects and general partnership purposes, (ii) a $155.0 million term loan to fund the Agrifos Acquisition and (iii) the $35.0 million revolving credit facility (the “2012 Revolving Credit Facility”).
	The Second 2012 Credit Agreement had a maturity date of October 31, 2017. Borrowings under the Second 2012 Credit Agreement bore interest at a rate equal to an applicable margin plus, at RNLLC’s option, either (a) in the case of base rate borrowings, a rate equal to the highest of (1) the prime rate, (2) the federal funds rate plus 0.5% or (3) LIBOR for an interest period of three months plus 1.00% or (b) in the case of LIBOR borrowings, the offered rate per annum for deposits of dollars for the applicable interest period on the day that was two business days prior to the first day of such interest period. The applicable margin for borrowings under the Second 2012 Credit Agreement was 2.75% with respect to base rate borrowings and 3.75% with respect to LIBOR borrowings. Additionally, RNLLC were required to pay a fee to the lenders under the CapEx Facility on the undrawn available portion at a rate of 0.75% per annum and a fee to the lenders under the 2012 Revolving Credit Facility on the undrawn available portion at a rate of 0.50% per annum. RNLLC also was required to pay customary letter of credit fees on issued letters of credit.
	RNP Notes Offering
	On April 12, 2013, RNP and Rentech Nitrogen Finance Corporation, a wholly-owned subsidiary of RNP (“Finance Corporation” and collectively with RNP, the “Issuers”), issued $320.0 million of 6.5% second lien senior secured notes due 2021 (the “RNP Notes”) to qualified institutional buyers and non-United States persons in a private offering exempt from the registration requirements of the Securities Act of 1933, as amended. The RNP Notes bear interest at a rate of 6.5% per year, payable semi-annually in arrears with the first interest payment made on October 15, 2013. The RNP Notes will mature on April 15, 2021, unless repurchased or redeemed earlier in accordance with their terms. RNP used part of the net proceeds from the offering to repay in full and terminate the Second 2012 Credit Agreement and related interest rate swaps, and intends to use the remaining proceeds to pay for expenditures related to its expansion projects and for general partnership purposes.

	The RNP Notes are fully and unconditionally guaranteed, jointly and severally, by each of RNP’s existing domestic subsidiaries, other than Finance Corporation. In addition, the RNP Notes and the guarantees thereof are collateralized by a second priority lien on substantially all of RNP’s and the guarantors’ assets, subject to permitted liens.
	The Issuers may redeem some or all of the RNP Notes at any time prior to April 15, 2016 at a redemption price equal to 100% of the principal amount of the RNP Notes redeemed, plus a “make whole” premium, and accrued and unpaid interest, if any, to the date of redemption. At any time prior to April 15, 2016, RNP may also, on any one or more occasions, redeem up to 35% of the aggregate principal amount of the RNP Notes issued with the net proceeds of certain equity offerings at 106.5% of the principal amount of the RNP Notes, plus accrued and unpaid interest, if any, to the date of redemption. On or after April 15, 2016, RNP may redeem some or all of the RNP Notes at a premium that will decrease over time, plus accrued and unpaid interest, if any, to the redemption date.
	2013 RNP Credit Agreement
	On April 12, 2013, RNP and Finance Corporation (collectively the “Borrowers”) entered into a new credit agreement (the “2013 RNP Credit Agreement”). The 2013 RNP Credit Agreement consists of a $35.0 million senior secured revolving credit facility (the “RNP Credit Facility”). The Borrowers may use the 2013 RNP Credit Agreement to fund their working capital needs, to fund capital expenditures, to issue letters of credit and for other general partnership purposes. The 2013 RNP Credit Agreement also includes a $10.0 million letter of credit sublimit. The commitment under the RNP Credit Facility may be increased by up to $15.0 million upon the Borrowers’ request at the discretion of the lenders and subject to certain customary requirements. As of December 31, 2013, borrowings under the RNP Credit Facility were strictly limited if RNP exceeded a Secured Leverage Ratio of 3.75 to 1.00. As of December 31, 2013, RNP’s Secured Leverage Ratio was 4.71 to 1.00, and at such time there were no outstanding advances under the RNP Credit Facility.
	Borrowings under the 2013 RNP Credit Agreement bear interest at a rate equal to an applicable margin plus, at the Borrowers’ option, either (a) in the case of base rate borrowings, a rate equal to the highest of (1) the prime rate, (2) the federal funds rate plus 0.5% or (3) LIBOR for an interest period of three months plus 1.00% or (b) in the case of LIBOR borrowings, the offered rate per annum for deposits of dollars for the applicable interest period on the day that is two business days prior to the first day of such interest period. If the Borrowers maintain a secured leverage ratio of less than 1.75:1 for the last quarter reported to the lenders, then the applicable margin for borrowings under the 2013 RNP Credit Agreement is 2.25% with respect to base rate borrowings and 3.25% with respect to LIBOR borrowings. If the Borrowers maintain a secured leverage ratio equal or greater than 1.75:1 for the last quarter reported to the lenders, then the applicable margin for borrowings under the 2013 RNP Credit Agreement is 2.50% with respect to base rate borrowings and 3.50% with respect to LIBOR borrowings.
	Additionally, the Borrowers are required to pay a fee to the lenders under the 2013 RNP Credit Agreement on the average undrawn available portion of the RNP Credit Facility at a rate equal to 0.50% per annum. The Borrowers must also pay a fee to the lenders under the 2013 RNP Credit Agreement at a rate equal to the product of the average daily undrawn face amount of all letters of credit issued, guaranteed or supported by risk participation agreements multiplied by a per annum rate equal to the applicable margin with respect to LIBOR borrowings, plus all customary letter of credit fees on issued letters of credit.

	All of RNP’s existing subsidiaries (other than Finance Corporation) guarantee, and certain of RNP’s future domestic subsidiaries will guarantee, RNP’s obligations pursuant to the 2013 RNP Credit Agreement. The 2013 RNP Credit Agreement, any hedging agreements issued by lenders under the 2013 RNP Credit Agreement and the subsidiary guarantees are collateralized by the same collateral securing the RNP Notes, which includes substantially all of RNP’s assets and all of the assets of its subsidiaries. After the occurrence and during the continuation of an event of default, proceeds of any collection, sale, foreclosure or other realization upon any collateral will be applied to repay obligations under the 2013 RNP Credit Agreement and the subsidiary guarantees thereof to the extent secured by the collateral before any such proceeds are applied to repay obligations under the RNP Notes, subject to a first lien cap (equal to the greater of $65 million or 20% of RNP’s consolidated net tangible assets (as defined in the Indenture governing the RNP Notes), plus obligations in respect of the first-priority secured indebtedness and obligations under certain hedging agreements and cash management agreements).
	The 2013 RNP Credit Agreement will terminate on April 12, 2018. Any amounts still outstanding at that time will be immediately due and payable. The Borrowers may voluntarily prepay their utilization and/or permanently cancel all or part of the available commitments under the 2013 RNP Credit Agreement in a minimum amount of $5.0 million. Amounts repaid may be reborrowed. Borrowings under the 2013 RNP Credit Agreement will be subject to mandatory prepayment under certain circumstances, with customary exceptions, from the proceeds of permitted dispositions of assets and from certain insurance and condemnation proceeds.
	Fulghum Debt
	As of December 31, 2013, Fulghum’s outstanding debt of $45.3 million had a weighted average interest rate of approximately 7.0%. The debt consists primarily of term loans with various financial institutions with each term loan collateralized by specific property and equipment. The term loans have maturity dates ranging from 2015 through 2028. Approximately $40.7 million and $4.6 million of the outstanding debt is with financial institutions located in the United States and South America, respectively.
	Fulghum debt at December 31, 2013 consisted of the following (in thousands):


	Outstanding debt		$	45,290
	Plus: unamortized premium			2,162

	Total debt			47,452
	Less: current portion			(8,401	)

	Long-term debt		$	39,051

	RNHI Revolving Loan
	On September 23, 2013, RNHI obtained a new $100.0 million revolving loan facility (“RNHI Revolving Loan”) by entering into a credit agreement (the “RNHI Credit Agreement”) among RNHI, Credit Suisse AG, Cayman Islands Branch, as administrative agent and each other lender from time to time party thereto. The Company expects that the new facility will be used to fund growth in its wood fibre processing business and for general corporate purposes. On September 24, 2013, the Company borrowed $50.0 million under the facility.
	All obligations of RNHI under the new facility are unconditionally guaranteed by the Company in a guaranty agreement (the “Guaranty”) and are secured by a portion of the common units of RNP owned by RNHI (the “Underlying Equity”). RNHI currently owns 23.25 million common units in RNP, 15.4 million of which have been provided as initial collateral under the RNHI Credit Agreement. Under certain circumstances, up to 19.4 million common units may be pledged as collateral.
	The new facility has a three year maturity and borrowings under the new facility bear interest at a rate equal to LIBOR plus 4.00% per annum. In the event the Company reduces a portion of or terminates all of the facility prior to its second anniversary through a refinancing collateralized by the Underlying Equity in form or substance materially similar to the facility and in which Credit Suisse AG, Cayman Islands Branch is not the lead lender, the Company will be required to pay a refinancing fee equal to 2.75% of the amount of commitments to be terminated, multiplied by a fraction, the numerator of which is the number of days from the date of such termination until the second anniversary of the closing and the denominator of which is 360. The Company is also required to pay a commitment fee to the administrative agent on the daily undrawn loan amount at a rate of 0.70% per annum. Additionally, on the closing date the Company paid one-time customary structuring and administrative fees to certain of the lenders.

	The new facility and the Guaranty contain customary affirmative and negative covenants and events of default relating to RNHI and the Company. The covenants and events of default in the RNHI Credit Agreement restrict RNHI from engaging in activities outside of its ordinary course operation as a holding company and include, among other things, limitations on the incurrence of indebtedness and liens, the making of investments, the sale of assets, and the making of restricted payments. There are also events of default relating to substantial declines in value of the Underlying Equity in relation to the amount drawn under the RNHI Credit Agreement. Dividends and distributions from RNHI are permitted so long as no default or event of default exists or will result therefrom, including if the Value (as defined in the RNHI Credit Agreement) of the Underlying Equity pledged to secure the loan does not meet the valuation requirements set forth in the RNHI Credit Agreement. RNHI also has the right to sell RNP common units not held as collateral as long as certain conditions outlined in the new facility, including meeting a certain LTV Ratio (as defined below) and realizing a minimum price on the sale, are met.
	In addition, the Company’s ability to draw or maintain an outstanding balance under the new facility is subject to the ratio of (i) the amount of loans and unpaid interest minus the Value of cash and cash equivalents in the collateral account divided by (ii) the Value of the collateral shares (the “LTV Ratio”), being less than an agreed upon ratio.
	BOM Credit Agreement
	On November 25, 2013, the Company entered into a credit agreement with Bank of Montreal (the “BOM Credit Agreement”). The BOM Credit Agreement consists of a $3.0 million revolving credit facility, which can be utilized as letters of credit.
	Borrowings bear a letter of credit fee of 3.75% per annum on the daily average face amount of the letters of credits outstanding during the preceding calendar quarter. The Company also is required to pay a commitment fee to on the average daily undrawn portion of the credit facility at a rate equal to 0.75% per annum. This commitment fee is payable quarterly in arrears on the last day of each calendar quarter and on the termination date. The BOM Credit Agreement will terminate on November 25, 2015. At December 31, 2013, letters of credit totaling approximately $1.1 million had been issued.
	QS Construction Facility
	In connection with the Drax Contract (as defined in Note 13 — Commitments and Contingencies), on April 30, 2013, the Company and Quebec Stevedoring Company Limited (“Quebec Stevedoring”) entered into a Master Services Agreement (the “Port Agreement”) pursuant to which Quebec Stevedoring is required to provide stevedoring, terminalling and warehousing services to the Company at the Port of Quebec. The Port Agreement is designed to support the term and volume commitments of the Drax Contract as well as future wood pellet exports through the Port of Quebec. Pursuant to the Port Agreement, Quebec Stevedoring is required to build handling equipment and 75,000 metric tons of wood pellet storage exclusively for the Company’s use at the port, with the same amount becoming a financing obligation for the Company (the “QS Construction Facility”).

	Total Debt
	As of December 31, 2013, the Company was in compliance with all covenants under the RNP Notes, Fulghum debt, RNHI Revolving Loan and the 2013 RNP Credit Agreement. Total debt consisted of the following:


			As of December 31,
			2013			2012
			(in thousands)
	Second 2012 Credit Agreement		$	—		$	193,290
	RNP Notes			320,000			—
	Fulghum debt			47,452			—
	RNHI Revolving Loan			50,000			—
	QS Construction Facility			4,527			—

	Total debt		$	421,979		$	193,290
	Less: current portion			(9,916	)		(7,750	)

	Long-term debt		$	412,063		$	185,540

Future maturities of total debt are as follows (in thousands):


For the Calendar Years Ending December 31
2014		$	9,916
2015			7,324
2016			55,535
2017			4,285
2018			1,636
Thereafter			343,283

		$	421,979

The payoff of the Second 2012 Credit Agreement resulted in a loss on debt extinguishment, for the calendar year ended December 31, 2013, of approximately $6.0 million. The entry into the Second 2012 Credit Agreement and the payoff of the First 2012 Credit Agreement resulted in a loss on debt extinguishment of approximately $2.1 million. As a result of redeeming convertible notes prior to maturity, the unamortized debt discount and debt issuance costs were written off which resulted in a loss on debt extinguishment of approximately $2.7 million. These two transactions resulted in a loss on debt extinguishment of approximately $4.8 million for the calendar year ended December 31, 2012. The entry into a credit agreement and the payoff of the previous credit agreements resulted in a loss on debt extinguishment, for the three months ended December 31, 2011, of approximately $10.3 million. The entry into and payoff of various credit agreements, resulted in a loss on debt extinguishment for the fiscal year ended September 30, 2011 of approximately $13.8 million.

Advance_for_Equity_Investment

Advance for Equity Investment	12 Months Ended
Advance for Equity Investment	Dec. 31, 2013
Equity Method Investments And Joint Ventures [Abstract]	'
Advance for Equity Investment	'
	Note 12 — Advance for Equity Investment
	In May 2007, the Company entered into an Equity Option Agreement with Peabody Venture Fund, LLC (“PVF”). Under the Equity Option Agreement, PVF agreed to fund the lesser of $10.0 million or 20% of the development costs for the Company’s proposed coal-to-liquids conversion project at the East Dubuque Facility incurred during the period between November 1, 2006 and the closing date of the financing for the project. In consideration for PVF’s payment of development costs, Rentech granted PVF an option to purchase an equity interest in the project for a purchase price equal to 20% of the equity contributions made to the project at the closing of the project financing, less the amount of development costs paid by PVF as of such time.

	The net proceeds from PVF under this agreement were $7.9 million which was recorded as an advance for equity investment on the consolidated balance sheets. Although the Company’s board of directors decided in the first quarter of 2008 to suspend development of the conversion of the East Dubuque Facility, the liability for the advance for equity investment was maintained as the potential for another coal-to-liquids project was considered probable by the Company.
	During the fiscal year ended September 30, 2011, the Company adopted a revised project development strategy for the commercialization of its alternative energy technologies, which included pursuing projects that were smaller and required less capital. Coal-to-liquids projects no longer fit the Company’s development strategy and development of a coal-to-liquids project was no longer probable. As a result, the liability was reversed as it was unlikely the Company would be required to fund the obligation in the future.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Dec. 31, 2013
Commitments And Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	Note 13 — Commitments and Contingencies
	Natural Gas Forward Purchase Contracts
	The Company’s policy and practice are to enter into fixed-price forward purchase contracts for natural gas in conjunction with contracted product sales in order to substantially fix gross margin on those product sales contracts. The Company may also enter into a limited amount of additional fixed-price forward purchase contracts for natural gas in order to minimize monthly and seasonal gas price volatility. The Company occasionally enters into index-price contracts for the purchase of natural gas. The Company elects the normal purchase normal sale exemption for these derivative instruments. As such, the Company does not recognize the unrealized gains or losses related to these derivative instruments in its consolidated financial statements. The Company has entered into multiple natural gas forward purchase contracts for various delivery dates through March 31, 2014. Commitments for natural gas purchases consist of the following:

		As of December 31,
		2013		2012
		(in thousands,
		except weighted
		average rate)
	MMBtus under fixed-price contracts		2,071		1,955
	MMBtus under index-price contracts		81		143

	Total MMBtus under contracts		2,152		2,098

	Commitments to purchase natural gas	$	8,571	$	7,531
	Weighted average rate per MMBtu based on the fixed rates and the indexes applicable to each contract	$	3.98	$	3.59
	Subsequent to December 31, 2013 through February 28, 2014, the Company entered into additional fixed-quantity forward purchase contracts at fixed and indexed prices for various delivery dates through March 31, 2014. The total MMBtus associated with these additional forward purchase contracts are approximately 0.5 million and the total amount of the purchase commitments are approximately $4.5 million, resulting in a weighted average rate per MMBtu of approximately $9.27 in these new commitments. The Company 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.
	Operating Leases
	The Company has various operating leases of real and personal property which expire through October 2028. Total lease expense, including month-to-month rent, common area maintenance charges and other rent related fees, for the calendar years ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011 was $2.0 million, $2.4 million, $0.6 million and $2.1 million, respectively.

	Future minimum lease payments as of December 31, 2013 are as follows (in thousands):


	For the Calendar Years Ending December 31,
	2014	$	3,382
	2015		3,631
	2016		2,656
	2017		2,117
	2018 and thereafter		14,874

		$	26,660

	Contractual Obligations
	Pasadena
	On April 17, 2013, the Company entered into an engineering, procurement and construction contract (the “EPC Contract”) with Abeinsa Abener Teyma General Partnership (“Abeinsa”). The EPC Contract provides for Abeinsa to be the contractor on the Company’s power generation project at the Pasadena Facility. The value of the contract is approximately $25.0 million and the project is expected to be completed by the fourth quarter of 2014.
	Wood Pellets
	On April 30, 2013, the Company entered into a ten-year off-take contract (the “Drax Contract”) with Drax Power Limited (“Drax”). Under the Drax Contract, the Company is required to sell to Drax the first 400,000 metric tonnes of wood pellets per year produced from the Wawa Project, with the first delivery under the contract scheduled for the end of calendar year 2014. In the event that the Company does not deliver wood pellets as required under the Drax Contract, the Rentech subsidiary that owns the Wawa Project is required to pay Drax an amount equal to the difference between the contract price for the wood pellets and the price of any wood pellets Drax purchases in replacement. Rentech has guaranteed this obligation in an amount not to exceed $20.0 million.
	For the Atikokan Project, the Company entered into a ten-year “take-or-pay” contract (the “OPG Contract”) with Ontario Power Generation (“OPG”) under which the Company is required to deliver 45,000 metric tonnes of wood pellets annually starting in 2014. OPG has the option to increase the amount of wood pellets the Company is required to deliver up to 90,000 metric tonnes annually. The Company expects that wood pellets produced at the Atikokan Project not purchased by OPG may be sold to Drax or marketed elsewhere. The Company expects that its initial deliveries to OPG will consist of wood pellets produced at the Atikokan Project during its early commissioning phase along with wood pellets purchased from third party suppliers.
	The contracts with Drax and OPG are designed to minimize exposure to variable costs over the ten-year terms by passing-through to Drax and OPG increased costs resulting from certain changes in input prices, including general inflation, the price of fuel, and prices of wood supplied to the mills. However, such indexation may not exactly offset increases or decreases in the prices of inputs and the cost of transporting and handling wood pellets.
	The Company has contracted with Canadian National (the “Canadian National Contract”) for all rail transportation of wood pellets from the Atikokan Project and the Wawa Project to the Port of Quebec for delivery to Drax. The Atikokan Project and the Wawa Project are located approximately 1,300 track miles and 1,100 track miles, respectively, from the Port of Quebec.
	Under the Canadian National Contract, the Company has committed to transport a minimum of 1,500 rail carloads during the months of January 2014 through December 2014, and 3,600 rail carloads annually thereafter for the duration of the long-term contract. Delivery shortfalls would result in a $1,000 per rail car penalty. Under the Drax Contract, the Company is responsible for the transportation of the wood pellets to the Port of Quebec. Drax is obligated to take delivery of the wood pellets on a FOB shipping point basis. Under the OPG Contract, OPG is obligated to take delivery of the Atikokan Project’s product on a FOB basis at the Atikokan Project.
	On November 25, 2013, the Company entered into a one-year wood pellet purchase contract (the “KD Contract”) with KD Quality Pellets. Under the KD Contract, the Company committed to purchase between 15,000 and 20,000 metric tonnes of wood pellets between December 1, 2013 and June 30, 2014. The KD Contract provides the Company with an option to extend the term of the agreement to five years. The Company may use the wood pellets that it purchases under the KD Contract to cover shortfalls in production during commissioning of the Atikokan Project, so that it meets its delivery commitments under an off-take contract with Ontario Power Generation. Any wood pellets that the Company purchases under the KD Contract and do not sell to OPG may be aggregated and sold to other consumers, including Drax.

	Litigation
	The Company is party to litigation from time to time in the normal course of business. The Company accrues legal liabilities only when it concludes that it is probable that it has an obligation for such costs and can reasonably estimate the amount of such costs. In cases where the Company 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. While the outcome of the Company’s current matters are not estimable or probable, the Company maintains insurance to cover certain actions and believes that resolution of its current litigation matters will not have a material adverse effect on the Company.
	Regulation
	The Company’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 Company’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 Company is subject are complex, change frequently and have tended to become more stringent over time. The ultimate impact on the Company’s business of complying with existing laws and regulations is not always clearly known or determinable due in part to the fact that the Company’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 Company 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 Company estimates the cost of the project required by the settlement agreement as being approximately $300,000.

Stockholders_Equity

Stockholders' Equity

12 Months Ended

Dec. 31, 2013

Equity [Abstract]

Stockholders' Equity

Note 14 — Stockholders’ Equity

Shelf Registration Statement

On July 9, 2013, the Company filed a shelf registration statement with the Securities and Exchange Commission, which allows it from time to time, in one or more offerings, to offer and sell up to $200.0 million in aggregate initial offering price of debt securities, common stock, preferred stock, depositary shares, warrants, rights to purchase shares of common stock and/or any of the other registered securities or units of any of the other registered securities.

Special Cash Distribution

On December 27, 2012, the Company paid a special one-time distribution of $0.19 per common share, to its shareholders of record as of the close of business on December 20, 2012 (the “Special Distribution”). In connection with the Special Distribution and in accordance with and pursuant to the Company’s various equity plans, the Company equitably adjusted its outstanding stock options, restricted stock units and performance stock units, as follows: (i) the exercise price of each outstanding stock option and the number of shares subject to each option were adjusted to reflect the impact of the Special Distribution, while preserving the aggregate spread of the options (i.e., the difference between the aggregate fair market value of the shares underlying the option and the aggregate exercise price for such shares); (ii) holders of time-vesting restricted stock units (“RSUs”) received a distribution equivalent distribution of $0.19 per RSU on December 27, 2012, (iii) holders of performance-vesting restricted stock units (“PSUs”) became eligible to receive $0.19 per PSU, payable, in the case of any unvested PSUs, only upon the subsequent vesting of the PSUs, and (iv) for purposes of determining whether the performance vesting requirement of a $3.00 weighted average closing share price over a trailing thirty-day period has been met for outstanding PSUs, $0.19 per share is added to the closing price for each day occurring on or after December 18, 2012. The Company did not record any incremental stock-based compensation in connection with the adjustment of stock options, payment of distributions on the RSUs and accrual of distributions on the PSUs. Some of the PSUs vested in January 2013 and the Special Distributions related to such PSUs were paid. There is still approximately $0.3 million which will be paid when the remaining PSUs vest. The Special Distribution payments were approximately $43.3 million in 2012, and $0.5 million in 2013, for a total of approximately $43.8 million.

Common Stock

In February 2012, the board of directors (the “Board”) of Rentech authorized the repurchase of up to $25.0 million, exclusive of commissions, of outstanding shares of its common stock over the subsequent 12-month period. The share repurchase program took effect in March 2012. As of December 31, 2012, Rentech had repurchased approximately 9.1 million shares of its common stock under the program for an aggregate purchase price of approximately $16.4 million. Share repurchases under this program were funded by Rentech’s available cash. No shares were acquired subsequent to December 31, 2012 and the share repurchase program expired.

On April 22, 2013, Rentech announced that the Board authorized the repurchase of up to $25.0 million, exclusive of commissions, of outstanding shares of its common stock through December 31, 2013. No shares were acquired through December 31, 2013 and the share purchase program has expired.

On December 28, 2011 the Company entered into Amendment No. 2 (the “Amendment”) to the Merger Agreement dated June 23, 2009 with Milton Farris, as Stockholder Representative, John A. Williams and certain other former stockholders of SilvaGas, a subsidiary of the Company in the Energy technology segment. The Amendment provided for the release of the approximately 3.4 million shares held in escrow and payment of 2.0 million shares of the Company’s common stock as final consideration as contemplated in the Merger Agreement. The issuance of the 2.0 million shares was recorded as an increase in the value of the SilvaGas patents in accordance with accounting standards for business combinations in effect when the Merger Agreement was executed.

Preferred Stock / Tax Benefit Preservation Plan

On August 5, 2011, the Board approved a Tax Benefit Preservation Plan between the Company and Computershare Trust Company, N.A., as rights agent (as amended from time to time, the “Plan”).

The Company has accumulated substantial operating losses. By adopting the Plan, the Board is seeking to protect the Company’s ability to carry forward its net operating losses (collectively, “NOLs”). For federal and state income tax purposes, the Company may “carry forward” NOLs in certain circumstances to offset current and future taxable income, which will reduce future federal and state income tax liability, subject to certain requirements and restrictions. However, if the Company were to experience an “ownership change,” as defined in Section 382 of the Internal Revenue Code (the “Code”), its ability to utilize these NOLs to offset future taxable income could be significantly limited. Generally, an “ownership change” would occur if the percentage of the Company’s stock owned by one or more “five percent stockholders” increases by more than fifty percentage points over the lowest percentage of stock owned by such stockholders at any time during the prior three-year period.

The Plan is intended to act as a deterrent to any person acquiring 4.99% or more of the outstanding shares of the Company’s common stock or any existing 4.99% or greater holder from acquiring more than an additional 1% of then outstanding common stock, in each case, without the approval of the Board and to thus mitigate the threat that stock ownership changes present to the Company’s NOL. The Plan includes procedures whereby the Board will consider requests to exempt certain acquisitions of common stock from the applicable ownership trigger if the Board determines that the acquisition will not limit or impair the availability of the NOLs to the Company.

In connection with its adoption of the Plan, the Board declared a dividend of one preferred stock purchase right (individually, a “Right” and collectively, the “Rights”) for each share of common stock of the Company outstanding at the close of business on August 19, 2011 (the “Record Date”). Each Right entitles the registered holder, after the Rights become exercisable and until expiration, to purchase from the Company one ten-thousandth of a share of the Company’s Series D Junior Participating Preferred Stock, par value $10.00 per share (the “Preferred Stock”), at a price of $3.75 per one ten-thousandth of a share of Preferred Stock, subject to certain anti-dilution adjustments (the “Purchase Price”).

One Right was distributed to stockholders of the Company for each share of common stock owned of record by them at the close of business on August 19, 2011. As long as the Rights are attached to the common stock, the Company will issue one Right with each new share of common stock so that all such shares will have attached Rights. The Company has reserved 45,000 shares of Preferred Stock for issuance upon exercise of the Rights.

The Rights will expire, unless earlier redeemed or exchanged by the Company or terminated, on the earliest to occur of: (i) August 5, 2014, subject to the Company’s right to extend such date, or (ii) the time at which the Board determines that the NOLs are fully utilized or no longer available under Section 382 of the Code or that an ownership change under Section 382 of the Code would not adversely impact in any material respect the time period in which the Company could use the NOLs, or materially impair the amount of the NOLs that could be used by the Company in any particular time period, for applicable tax purposes. The Rights do not have any voting rights.

Long-Term Incentive Equity Awards

2009 Awards and Options

In the fiscal year ended September 30, 2009, ten percent (10%) of the cash bonus awards for the named executive officers was allocated to purchase vested restricted stock units in December 2009 pursuant to the management stock purchase plan. The Company matched these awards with an equal number of restricted stock units that vested on December 10, 2012, subject to the recipient’s continued employment with the Company.

In the fiscal year ended September 30, 2011, approximately 3.0 million options were awarded to a group of employees.

The Board and its compensation committee (the “Compensation Committee”) approved long-term incentive equity awards for a group of its officers including its named executive officers effective November 17, 2009. The awards include both restricted stock units that may vest upon the achievement of certain performance targets, and restricted stock units that vest over time. The awards are intended to balance the objectives of retention, equity ownership by management, and achievement of performance targets. Vesting of the performance awards is tied to milestones related to the development, construction and operation of the Company’s proposed renewable synthetic fuels and power project in Rialto, California or another comparable project designated by the Compensation Committee. In the fourth quarter of the fiscal year ended September 30, 2011, the Company determined that the Rialto Project would not be developed. Previously accrued compensation expense of $1.9 million for performance based restricted stock units tied to Rialto Project milestones was reversed and is included in selling, general and administrative expense.

The November 2009 long-term incentive equity awards also include a time vesting restricted stock unit award, granted to a group of employees, that vests over a three year period with one-third of the restricted stock units vesting on each of the first three anniversaries of November 17, 2009. The time vesting awards are subject to the recipient’s continued employment with the Company, provided that a recipient’s award may vest upon (i) termination without cause related to a change in control or (ii) death or disability.

Performance Awards 2011 – 2013

Two types of performance awards were granted in December 2011, 2012 and 2013. For the December 2012 and 2013 awards, vesting was based on total shareholder return over a three-year period.

For the December 2011 performance awards, vesting was based on a price benchmark for the shares of Rentech. The performance awards vested in full on the first date occurring on or prior to October 12, 2014 on which the Company’s volume weighted average share price for any 30-day period equaled or exceeded $3.00. The $3.00 threshold was calculated by using the normal closing share price for each day in the thirty day period that was prior to the ex-dividend date and using the closing share price plus the Special Distribution of $0.19 per share for the ex-dividend date and each day after that. These awards vested in January 2013.

The performance awards granted during the calendar year ended December 31, 2013 and 2012 vest equally over a three-year period from grant date based on achieving a certain total shareholder return on the Company’s stock on each measurement date plus the recipient’s continued employment with Company.

Time Vested Awards 2011 – 2013

Time vested restricted stock awards of approximately 2.0 million, 1.1 million, 3.5 million and 2.2 million were issued during the calendar years ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011. Of the 3.5 million awards issued during the three months ended December 31, 2011, 2.0 million of these awards were to reward executives for their success in completing the Offering and to incentivize these executives with respect to the additional demands that will be placed upon them in connection with RNP becoming a publicly traded company. All the awards vest over a three year period and vesting is subject to the recipient’s continued employment with the Company.

During the calendar years ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011, the Company issued the following performance shares and restricted stock units:

Number of Awards

For the Calendar Years

For the Three

For the Fiscal

Ended December 31,

Months Ended

Year Ended

December 31,

September 30,

2013

2012

2011

Type of Award

Performance awards

3,005,000

1,963,000

2,960,000

—

Time-vested awards

1,994,000

1,136,000

3,508,000

2,195,000

Total

4,999,000

3,099,000

6,468,000

2,195,000

Long-Term Incentive Equity Awards – RNP

On November 2, 2011, the board of directors of the General Partner adopted the Rentech Nitrogen Partners, L.P. 2011 Long-Term Incentive Plan (the “2011 LTIP”) to provide awards of RNP’s units. The General Partner’s officers, employees, consultants and non-employee directors, as well as other key employees of the Company, the indirect parent of the General Partner, and certain of RNP’s other affiliates who make significant contributions to its business, are eligible to receive awards under the 2011 LTIP, thereby linking the recipients’ compensation directly to RNP’s performance. The 2011 LTIP provides for the grant of unit awards, restricted units, phantom units, unit options, unit appreciation rights, distribution equivalent rights, profits interest units and other unit-based awards of RNP units. Subject to adjustment in the event of certain transactions or changes in capitalization, 3,825,000 common units may be delivered pursuant to awards under the 2011 LTIP.

Accounting_for_Equity_Based_Co

Accounting for Equity Based Compensation (Phantom Share Units (PSUs) [Member])	12 Months Ended
	Dec. 31, 2013
Phantom Share Units (PSUs) [Member]	'
Accounting for Equity Based Compensation	'
	Note 15 — Accounting for Equity Based Compensation
	The accounting guidance requires all share-based payments, including grants of stock options, to be recognized in the statement of operations, based on their fair values. Stock based compensation expense for all fiscal periods is based on estimated grant-date fair value. Stock options generally vest over three years. As a result, compensation expense recorded during the period includes amortization related to grants during the period as well as prior grants. Some grants under the 2011 LTIP are marked-to market at each reporting date. Most grants have graded vesting provisions where an equal number of shares vest on each anniversary of the grant date. The Company allocates the total compensation cost on a straight-line attribution method over the requisite service period. Most grants vest upon the fulfillment of service conditions and have no performance or market-based vesting conditions. Certain grants of warrants and restricted stock units include share price driven vesting provisions. Stock based compensation expense that the Company records is included in selling, general and administrative expense. There was no tax benefit in periods reported herein from recording this non-cash expense as such benefits will be recorded upon utilization of the Company’s net operating losses.
	During the calendar years ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011, charges associated with all equity-based grants were recorded as follows:


			For the Calendar						For the Three				For the Fiscal
			Years Ended						Months Ended				Year Ended
			December 31,						December 31,				September 30,
			2013			2012			2011				2011
			(in thousands)
	Compensation expense		$	5,319		$	7,357		$	1,015			$	1,063
	Board compensation expense			603			591			50				604

	Total compensation expense			5,922			7,948			1,065				1,667
	Consulting expense			18			74			9				62

	Total expense		$	5,940		$	8,022		$	1,074			$	1,729

	Reduction to both basic and diluted earnings per share from compensation expense		$	0.03		$	0.04		$	—			$	0.01

	The Company uses the Black-Scholes option pricing model to determine the weighted average fair value of options and warrants. The assumptions utilized to determine the fair value of options and warrants are indicated in the following table:


			For the Calendar						For the Three		For the Fiscal
			Years Ended						Months Ended		Year Ended
			December 31,						December 31,		September 30,
			2013			2012			2011		2011
	Risk-free interest rate			—			—		1.16% - 1.74%		1.55% - 2.69%
	Expected volatility			—			—		104.00%		97.0% - 98.0%
	Expected life (in years)			—			—		6.00 - 8.00		5.00 - 8.00
	Dividend yield			—			—		0.00%		0.00%
	Forfeiture rate			—			—		14.00%		0.0% - 8.0%
	The risk-free interest rate is based on a treasury instrument whose term is consistent with the expected life of the Company’s stock options. The Company used the last day of the month stock price over the last 54 months to calculate and project expected stock price volatility Expected volatility was assumed to equal historical volatility. The estimated expected term of the grant is based on the Company’s historical exercise experience. The Company included a forfeiture component in the pricing model on certain grants to employees, based on historical forfeiture rate for the grantees’ level employees.
	The number of shares reserved and outstanding as of December 31, 2012 have been adjusted to reflect the increase of approximately 312,000 shares that resulted from adjustments resulting from the Special Distribution. The number of shares reserved, outstanding and available for issuance are as follows:


			Shares Reserved			Shares Underlying							Shares Available for Issuance
			as of December 31,			Outstanding Awards as of							as of December 31,
						December 31,
			2013			2013			2012				2013			2012
	Name of Plan		(in thousands)
	2005 Stock Option Plan			1,000			195			195				—			—
	2006 Incentive Award Plan:
	Stock options			8,000			1,338			1,710				—			67
	Restricted stock units and performance share awards						1,322			1,745				—			—
	2009 Incentive Award Plan:
	Stock options			32,900			1,713			2,255				4,483			3,513
	Restricted stock units and performance share awards						9,991			9,223				—			—
	Adjustment for Special Distribution			312			244			312				—			—

				42,212			14,803			15,440				4,483			3,580
	Restricted stock units not from a plan			1,225			17			33				—			—

				43,437			14,820			15,473				4,483			3,580

	Stock Options
	The Company has multiple stock option plans under which options have been granted to employees, including officers and directors of the Company, to purchase shares of the Company at a price not less than the fair market value of the Company’s common stock at the date the options were granted. Each of these plans allows the issuance of incentive stock options, within the meaning of the Code, and other options pursuant to the plan that constitute non-statutory options. Options under the Company’s 2005 Stock Option Plan generally expire five years from the date of grant or at an alternative date as determined by the committee of the Board that administers the plan. Options under the Company’s 2006 Incentive Award Plan and the 2009 Incentive Award Plan generally expire between three and ten years from the date of grant or at an alternative date as determined by the committee of the Board that administers the plan. Options under the Company’s 2005 Stock Option Plan, 2006 Incentive Award Plan and the 2009 Incentive Award Plan are generally exercisable on the grant date or a vesting schedule between one and three years from the grant date as determined by the committee of the Board that administers the plans.

	During the calendar years ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011, charges associated with stock option grants were recorded as follows:


			For the Calendar Years						For the Three				For the Fiscal
			Ended December 31,						Months Ended				Year Ended
					December 31,		September 30,
				2013			2012			2011				2011
					(in thousands)
Compensation expense		$	516		$	658			$	216			$	632
Board compensation expense			—			—			—				129

Total compensation expense			516			658			216				761
Consulting expense			18			22			9				30

Total expense		$	534		$	680		$	225			$	791

Option transactions during the calendar years ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011 are summarized as follows:

		Number of			Weighted			Aggregate
		Shares			Average			Intrinsic
					Exercise			Value
					Price
Outstanding at September 30, 2010			2,407,000		$	2.9
Granted			3,217,000			0.96
Exercised			—
Canceled / Expired			(689,000	)		2.06

Outstanding at September 30, 2011			4,935,000			1.75
Granted			50,000			1.58
Exercised			(32,000	)		0.95
Canceled / Expired			(281,000	)		3.67

Outstanding at December 31, 2011			4,672,000			1.64
Granted			—			—
Exercised			(276,000	)		1.1
Canceled / Expired			(236,000	)		1.89
Adjustment for Special Distribution			312,000

Outstanding at December 31, 2012			4,472,000			1.67		$	5,848,000
Granted			—			—
Exercised			(711,000	)		1.03
Canceled / Expired			(271,000	)		2.4

Outstanding at December 31, 2013			3,490,000		$	1.59		$	2,144,448

Options exercisable at December 31, 2013			3,436,000		$	1.6		$	2,110,045
Options exercisable at December 31, 2012			3,485,000		$	1.73
Options exercisable at December 31, 2011			2,739,000		$	2.11
Options exercisable at September 30, 2011			2,116,000		$	2.81
Weighted average fair value of options granted during the three months ended December 31, 2011					$	1.32
Weighted average fair value of options granted during the fiscal year ended September 30, 2011					$	0.78

The aggregate intrinsic value was calculated based on the difference between the Company’s stock price on December 31, 2013 and the exercise price of the outstanding shares, multiplied by the number of shares underlying outstanding awards as of December 31, 2013. The total intrinsic values of options exercised during the calendar years ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011 were $0.9 million, $0.3 million, $21,000 and $0, respectively.
As of December 31, 2013, there was $25,460 of total unrecognized compensation cost related to nonvested share-based compensation arrangements from previously granted stock options. This cost is expected to be recognized over a weighted-average period of 0.75 years.
The following information summarizes stock options outstanding and exercisable at December 31, 2013:


		Outstanding										Exercisable
					Weighted Average			Weighted							Weighted
					Remaining			Average							Average
		Number			Contractual Life			Exercise				Number			Exercise
Range of Exercise Prices		Outstanding			in Years			Price				Exercisable			Price
$0.56-$0.92			2,193,000			6.6		$	0.88				2,166,000		$	0.88
$0.96-$1.00			27,000			7.49			0.96				18,000			0.96
$1.12-$1.51			493,000			2.72			1.31				475,000			1.3
$2.07-$2.50			32,000			2.31			2.07				32,000			2.07
$3.50-$3.50			21,000			2.95			3.5				21,000			3.5
$3.87-$4.00			724,000			2.55			3.88				724,000			3.88

			3,490,000			5.16		$	1.6				3,436,000		$	1.6

Warrants
During fiscal 2005, the Company issued a warrant to Management Resource Center, Inc, an entity controlled by D. Hunt Ramsbottom, the Company’s President and CEO. During the last quarter of fiscal 2005, Mr. Ramsbottom assigned the warrant to East Cliff Advisors, LLC, an entity controlled by Mr. Ramsbottom. The warrant is for the purchase of 3.5 million shares of the Company’s common stock at an exercise price of $1.82 per share. The warrant has vested or will vest in the following incremental amounts upon such time as the Company’s stock reaches the stated closing prices for 12 consecutive trading days: 10% at $2.10 (vested); 15% at $2.75 (vested); 20% at $3.50 (vested); 25% at $4.25 (vested); and 30% at $5.25 (not vested). The Company recognizes compensation expense as the warrants vest, as the total number of shares to be granted under the warrant was not known on the grant date. In fiscal 2005, the Company accounted for the warrant under guidance for accounting for stock issued to employees due to the employer-employee relationship between the Company and Mr. Ramsbottom. Under the guidance applicable at the time, compensation cost would be recognized for stock based compensation granted to employees only when the exercise price of the Company’s stock options granted is less than the market price of the underlying common stock on the date of grant.
The original warrants covered 2,082,500 shares that had vested and 1,050,000 shares that had not vested. East Cliff Advisors assigned 262,500 unvested warrants to a third party and continued to hold 787,500 unvested warrants. In January 2009, the vesting terms and expiration for the warrants held by East Cliff Advisors, LLC were amended. As amended, with respect to the unvested warrants representing 787,500 shares, half of these warrants vested on December 31, 2011. The exercise price of the warrants remained at $1.82 per share. The expiration date for this half of the warrants was extended from August 4, 2010 to December 31, 2012. The warrants were excised during the calendar year ended December 31, 2012. The other 393,750 unvested warrants and the original vested 2,082,500 warrants expired on December 31, 2011.

During the calendar years ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011, charges associated with grants of warrants were recorded as follows:


		For the Calendar						For the Three				For the Fiscal
		Years Ended						Months Ended				Year Ended
		December 31,						December 31,				September 30,
		2013			2012			2011				2011
								(in thousands)
Compensation expense		$	—		$	—		$	6			$	26
Board compensation expense			—			—			—				—

Total compensation expense		$	—		$	—		$	6			$	26

Warrant transactions during the calendar years ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011 are summarized as follows:


		Number of			Weighted
		Shares			Average
					Exercise
					Price
Outstanding at September 30, 2010			12,596,000		$	1.89
Granted			1,980,000			0.99
Exercised			—			—
Canceled / Expired			—			—

Outstanding at September 30, 2011			14,576,000		$	1.77
Granted			—			—
Vested			394,000			1.82
Exercised			(2,464,000	)		0.91
Canceled / Expired			(2,082,000	)		1.82

Outstanding at December 31, 2011			10,424,000		$	1.96
Granted			—			—
Vested			—			—
Exercised			(5,156,000	)		1.27
Canceled / Expired			(4,018,000	)		3.28

Outstanding at December 31, 2012			1,250,000		$	0.57
Granted			—			—
Vested			—			—
Exercised			—			—
Canceled / Expired			—			—

Outstanding at December 31, 2013			1,250,000		$	0.57

Warrants exercisable at December 31, 2013			1,250,000		$	0.57
Warrants exercisable at December 31, 2012			1,250,000		$	0.57
Warrants exercisable at December 31, 2011			10,424,000		$	1.96
Warrants exercisable at September 30, 2011			14,576,000		$	1.77
Weighted average fair value of warrants granted during the fiscal year ended September 30, 2011					$	0.64

As of December 31, 2013, there was no unrecognized compensation cost related to share-based compensation arrangements from previously granted warrants.
The following information summarizes warrants outstanding and exercisable at December 31, 2013:


		Outstanding										Exercisable
					Weighted Average			Weighted							Weighted
					Remaining			Average							Average
		Number			Contractual Life			Exercise				Number			Exercise
Range of Exercise Prices		Outstanding			in Years			Price				Exercisable			Price
$0.57			1,250,000			9.25		$	0.57				1,250,000		$	0.57
Restricted Stock Units and Performance Share Awards
The Company issues Restricted Stock Units (“RSUs”) which are equity-based instruments that may be settled in shares of common stock of the Company. In the calendar years ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011, the Company issued RSUs and Performance Share Awards to certain employees and directors as long-term incentives.
Most RSU agreements vest with the passage of time and include a three-year vesting period such that one-third will vest on each annual anniversary date of the commencement date of the agreement. Other RSU agreements contain vesting provisions based on performance against certain specific goals. The vesting of all RSUs is contingent on continued employment of the grantee. The vesting of various RSUs are subject to partial or complete acceleration under certain circumstances, including termination without cause, end of employment for good reason or upon a change in control (in each case as defined in the agreement). In certain agreements, if the Company fails to offer to renew an employment agreement on competitive terms or if a termination occurs which would entitle the grantee to severance during the period of three months prior and two years after a change in control, the vesting of the restricted stock unit grant will accelerate.
The compensation expense incurred by the Company for RSUs is based on the closing market price of the Company’s common stock on the date of grant and is amortized ratably on a straight-line basis over the requisite service period and charged to selling, general and administrative expense with a corresponding increase to additional paid-in capital. The compensation expense incurred by the Company for Performance Share Awards is based on the Monte Carlo valuation model. For the 2013 Performance Share Awards, the key assumptions used in the Monte Carlo valuation model were an expected volatility of 57.51%, a risk-free rate of interest of 0.64% and a dividend yield of 0.00%.
During the calendar years ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011, charges associated with RSUs and Performance Share Award grants were recorded as follows:


		For the Calendar						For the Three				For the Fiscal
		Years Ended						Months Ended				Year Ended
		December 31,						December 31,				September 30,
		2013			2012			2011				2011
		(in thousands)
Compensation expense		$	4,803		$	6,699		$	793			$	405
Board compensation expense			202			190			50				75

Total compensation expense		$	5,005		$	6,889		$	843			$	480


RSU and Performance Share Award transactions during the calendar year ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011 are summarized as follows:


		Number of			Weighted			Aggregate
		Shares			Average			Intrinsic
					Grant Date			Value
					Fair Value
Outstanding at September 30, 2010			7,560,000			1.3
Granted			2,195,000			0.98
Vested and Settled in Shares			(1,212,000	)		1.35
Vested and Surrendered for Withholding Taxes Payable			(578,000	)		1.33
Canceled / Expired			(1,342,000	)		1.3

Outstanding at September 30, 2011			6,623,000			1.18
Granted			6,468,000			1.5
Vested and Settled in Shares			(739,000	)		1.08
Vested and Surrendered for Withholding Taxes Payable			(371,000	)		1.09
Canceled / Expired			(93,000	)		1.12

Outstanding at December 31, 2011			11,888,000			1.37
Granted			3,099,000			2.55
Vested and Settled in Shares			(2,080,000	)		1.35
Vested and Surrendered for Withholding Taxes Payable			(975,000	)		1.4
Canceled / Expired			(931,000	)		1.37

Outstanding at December 31, 2012			11,001,000			1.71		$	28,934,000
Granted			4,999,000			1.66
Vested and Settled in Shares			(2,680,000	)		1.49
Vested and Surrendered for Withholding Taxes Payable			(1,812,000	)		1.37
Canceled / Expired			(178,000	)		2.18

Outstanding at December 31, 2013			11,330,000			1.76		$	23,793,000

Of the 11,330,000 RSUs and Performance Share Awards outstanding at December 31, 2013, 1,322,000 and 9,991,000 were granted pursuant to the Company’s 2006 Incentive Award Plan and 2009 Incentive Award Plan, respectively. The other 17,000 RSUs were not granted pursuant to a stock option plan but were “inducement grants.” Of the 11,001,000 RSUs and Performance Share Awards outstanding at December 31, 2012, 1,745,000 and 9,223,000 were granted pursuant to the Company’s 2006 Incentive Award Plan and 2009 Incentive Award Plan, respectively. Of the 11,888,000 RSUs and Performance Share Awards outstanding at December 31, 2011, 2,567,000 and 8,963,000 were granted pursuant to the Company’s 2006 Incentive Award Plan and 2009 Incentive Award Plan, respectively. The other 358,000 RSUs were not granted pursuant to a stock option plan but were “inducement grants.” Of the 6,623,000 RSUs and Performance Share Awards outstanding at September 30, 2011, 1,812,000 and 4,228,000 were granted pursuant to the Company’s 2006 Incentive Award Plan and 2009 Incentive Award Plan, respectively. The other 583,000 RSUs were not granted pursuant to a stock option plan but were “inducement grants.”
As of December 31, 2013, there was $8.0 million of total unrecognized compensation cost related to non-vested share-based compensation arrangements from previously granted RSUs and Performance Share Awards. That cost is expected to be recognized over a weighted-average period of 1.9 years.
The grant date fair value of RSUs and Performance Share Awards that vested during the calendar year ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011 was $3.9 million, $4.2 million, $1.2 million and $2.4 million, respectively.

Stock Grants
During the calendar year ended December 31, 2013, the Company issued a total of 178,400 shares of stock to its directors, which were fully vested at date of grant. This resulted in stock-based compensation expense of $401,400 for the shares granted to the directors. During the calendar year ended December 31, 2012, the Company issued a total of 259,400 shares of stock which were fully vested at date of grant. Of this amount, 234,400 shares, which were evenly distributed, were granted to the directors and 25,000 shares were granted to a consultant. This resulted in stock-based compensation expense of $401,000 and $52,000 for the shares granted to the directors and consultant, respectively. During the three months ended December 31, 2011, the Company did not issue any grants of stock. During the fiscal year ended September 30, 2011, the Company issued a total of 465,000 shares of stock which were fully vested at date of grant. Of this amount, 440,000 shares, which were evenly distributed, were granted to the directors and 25,000 shares were granted to a consultant. This resulted in stock-based compensation expense of $400,000 and $32,000 for the shares granted to the directors and consultant, respectively.
2011 LTIP
Some grants under the 2011 LTIP are marked-to market at each reporting date. During the calendar years ended December 31, 2013 and 2012 and the three months ended December 31, 2011, charges associated with all equity-based grants issued by RNP under the 2011 LTIP were recorded as follows:


		For the Calendar Years						For the Three Months
		Ended December 31,						Ended December 31,
		2013			2012			2011
		(in thousands)
Stock based compensation expense		$	1,460		$	2,827		$	63

Phantom unit transactions during the calendar years ended December 31, 2013 and 2012 and the three months ended December 31, 2011 are summarized as follows:


		Number of			Weighted			Aggregate
		Shares			Average			Intrinsic
					Grant Date			Value
					Fair Value
Granted			163,388		$	18.4

Outstanding at December 31, 2011			163,388			18.4
Granted			54,059			34.86
Vested and Settled in Shares			(42,350	)		(15.68	)
Vested and Surrendered for Withholding Taxes Payable			(20,040	)		(18.40	)
Canceled / Expired			(119	)		(18.40	)

Outstanding at December 31, 2012			154,938		$	23.78		$	5,839,626
Granted			116,508			18.71
Vested and Settled in Shares			(49,409	)		(23.42	)
Vested and Surrendered for Withholding Taxes Payable			(27,127	)		(21.75	)
Canceled / Expired			(1,278	)		(35.14	)

Outstanding at December 31, 2013			193,632		$	20.97		$	3,407,929

During the calendar year ended December 31, 2013, RNP issued 116,508 unit-settled phantom units (which entitle the holder to distribution rights during the vesting period) covering RNP’s common units. 108,218 of the phantom units are time-vested awards that vest in three equal annual installments. 2,780 of the phantom units were time-vested awards issued to the directors that vested on the one-year anniversary of the Offering. The phantom unit grants resulted in unit-based compensation expense of $1.2 million for the calendar year ended December 31, 2013.

As of December 31, 2013, there was $3.0 million of total unrecognized compensation cost related to non-vested share-based compensation arrangements from previously granted phantom units. That cost is expected to be recognized over a weighted-average period of 2.2 years.
During the calendar year ended December 31, 2013, RNP issued a total of 5,510 common units which were fully vested at date of grant. The common units were issued to the directors and resulted in unit-based compensation expense of $0.3 million.

Future_Minimum_Lease_Receipts

Future Minimum Lease Receipts	12 Months Ended
Future Minimum Lease Receipts	Dec. 31, 2013
Leases [Abstract]	'
Future Minimum Lease Receipts	'
	Note 16 — Future Minimum Lease Receipts
	The Company has certain wood chip processing, wood yard operations and wood pellet agreements, which contain embedded leases.
	The following is a schedule by years of minimum future rentals on non-cancelable operating leases as of December 31, 2013 (in thousands):


	For the Calendar Years Ending December 31,
	2014	$	41,900
	2015		90,951
	2016		94,378
	2017		91,629
	2018		84,573

		$	403,431

Employee_Benefit_Plans

Employee Benefit Plans	12 Months Ended
Employee Benefit Plans	Dec. 31, 2013
Postemployment Benefits [Abstract]	'
Employee Benefit Plans	'
	Note 17 — Employee Benefit Plans
	Defined Contribution Plans
	The Company has a 401(k) plan. Most employees, excluding RNLLC’s union employees, who are at least 18 years of age are eligible to participate in the plan on the first of the month following 60 days and share in the employer matching contribution. The Company is currently matching 100% of the first 3% and 50% of the next 3% of the participant’s salary deferrals. The Company contributed $1.2 million, $1.0 million, $0.2 million and $0.9 million to the plans for the calendar years ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011, respectively. Additionally, RNP has a savings and profit sharing plan for the benefit of qualified employees at the Pasadena Facility. The plan cost for the calendar year ended December 31, 2013 and for the period November 1, 2012 through December 31, 2012 was approximately $108,000 and $9,000 respectively.
	Pension Plans
	Reporting and disclosures related to pension and other postretirement benefit plans require that companies include an additional asset or liability on the balance sheet to reflect the funded status of retirement and other postretirement benefit plans, and a corresponding after-tax adjustment to accumulated other comprehensive income.
	RNP has two noncontributory pension plans (the “Pension Plans”), which cover either hourly paid employees represented by collective bargaining agreements in effect at its Pasadena Facility or hourly employees at its Pasadena Facility who have 1,000 hours of service during a year of employment.
	Postretirement Benefits
	RNP has a postretirement benefit plan (the “Postretirement Plan”) for certain employees at its Pasadena Facility. The plan provides a fixed dollar amount to supplement payment of eligible medical expenses. The amount of the supplement under the plan is based on years of service and the type of coverage elected (single or family members and spouses). Participants are eligible for supplements at retirement after age 55 with at least 20 years of service to be paid until the attainment of age 65 or another disqualifying event, if earlier.

	The Pension Plans and the Postretirement Plan were acquired as part of the Agrifos Acquisition. The following tables summarize the projected benefit obligation, the assets and the funded status of the Pension Plans and the Postretirement Plan at December 31, 2013 and 2012:


			As of December 31, 2013								As of December 31, 2012
			Pension				Postretirement				Pension				Postretirement
			(in thousands)
	Projected benefit obligation
	Benefit obligation at beginning of year		$	4,841			$	1,136			$	5,213			$	863
	Service cost			137				43				29				4
	Interest cost			194				43				31				5
	Amendment			—				—				—				332
	Actuarial (gain) loss			(528	)			(233	)			(412	)			(54	)
	Actual benefit paid			(139	)			(136	)			(20	)			(14	)

	Benefit obligation at end of year			4,505				853				4,841				1,136

	Fair value of plan assets
	Fair value of plan assets at beginning of year			4,333				—				4,279				—
	Actual return on plan assets			624				—				74				—
	Employer contributions			109				136				—				14
	Actual benefit paid			(139	)			(136	)			(20	)			(14	)

	Fair value of plan assets at end of year			4,927				—				4,333				—

	Funded status at end of year			422				(853	)		$	(508	)		$	(1,136	)

	Amounts recognized in the consolidated balance sheet
	Noncurrent assets		$	422			$	—			$	—			$	—
	Current liabilities			—				(86	)			—				(95	)
	Noncurrent liabilities			—				(767	)			(508	)			(1,041	)

			$	422				(853	)		$	(508	)		$	(1,136	)

	As of December 31, 2013 and 2012, the accumulated benefit obligation equaled the projected benefit obligation.
	The components of net periodic benefit cost and other changes in plan assets and benefit obligations recognized in other comprehensive income are as follows for the calendar year ended December 31, 2013 and for the two-month period ended December 31, 2012:



			For the Calendar Year								For the Two-Month Period
			Ended December								Ended December
			31, 2013								31, 2012
			Pension				Postretirement				Pension				Postretirement
			(in thousands)
	Net periodic benefit cost
	Service cost		$	137			$	43			$	29			$	4
	Interest cost			194				43				31				5
	Expected return on plan assets			(260	)			—				(42	)			—
	Amortization of prior service cost			—				22				—				—
	Amortization of net gain			(5	)			—				—				—

	Net periodic pension costs		$	66			$	108			$	18			$	9

	Other changes in plan assets and benefit obligations recognized in other comprehensive income
	Net actuarial gain		$	(893	)		$	(233	)		$	(444	)		$	(54	)
Recognized actuarial gain			5				—				—				—
Prior service cost			—				—				—				332
Recognized prior service cost			—				(22	)			—				—

Total recognized in other comprehensive (income) loss		$	(888	)		$	(255	)		$	(444	)		$	278


Accumulated other comprehensive income (loss) at December 31, 2013 and 2012 consists of the following amounts that have not yet been recognized in net periodic benefit cost:


		As of December 31, 2013								As of December 31, 2012
		Pension				Postretirement				Pension				Postretirement
		(in thousands)
Net (gain) loss		$	(1,332	)		$	(287	)		$	(444	)		$	(54	)
Prior service costs			—				310				—				332

		$	(1,332	)		$	23			$	(444	)		$	278

The expected portion of the accumulated other comprehensive (income) loss expected to be recognized as a component of net periodic benefit cost in 2014 is approximately $(56,000) and $6,000 for the Pension Plans and Postretirement Plan, respectively.
Weighted average assumptions used to determine benefit obligations:


		As of December 31, 2013								As of December 31, 2012
		Pension				Postretirement				Pension				Postretirement
Discount rate			4.8	%			4.7	%			4.1	%			4	%
Weighted average assumptions used to determine net pension cost:


		For the Year Ended								For the Year Ended
		December 31, 2013								December 31, 2012
		Pension				Postretirement				Pension				Postretirement
Discount rate			4.1	%			4	%			3.6	%			3.6	%
Expected rate of return on assets			6	%			N/A				6	%			N/A


		Postretirement
		As of December 31,
		2013				2012
Health care cost trend: initial			7.25	%			7.5	%
Health care cost trend: ultimate			5	%			5	%
Year ultimate reached			2023				2023
As the Postretirement Plan provides a fixed dollar amount to participants, increasing or decreasing the health care cost trend rate by 1% would not have a material impact on the December 31, 2013 and 2012 obligation.


		As of December 31, 2013								As of December 31, 2012
		Target				Percentage of				Target				Percentage of
		Allocation				Pension Plan				Allocation				Pension Plan
						Assets 2013								Assets 2012
Asset Category
Equity securities			50	%			52	%			50	%			51	%
Debt securities			50	%			48	%			50	%			49	%
The pension plan assets, which are deemed to be Level 1, measured at fair value consist of the following at December 31, 2013 and 2012 (in thousands):


		As of December 31,
		2013				2012
Mutual funds — equity		$	2,560			$	2,193
Mutual funds — fixed income			2,356				2,134
Cash			11				6

Fair value of plan assets		$	4,927			$	4,333

RNP expects to contribute $0 and approximately $88,000 to Pension Plans and a Postretirement Plan, respectively, in 2014.

Expected Future Benefit Payments:


		Pension				Postretirement
		(in thousands)
2014		$	193			$	88
2015			206				79
2016			211				58
2017			223				68
2018			228				63
2019-2023			1,259				226

Income_Taxes

Income Taxes	12 Months Ended
Income Taxes	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Note 18 — Income Taxes
	Accounting guidance requires deferred tax assets and liabilities to be recognized for temporary differences between the tax basis and financial reporting basis of assets and liabilities, computed at the expected tax rates for the periods in which the assets or liabilities will be realized, as well as for the expected tax benefit of net operating loss and tax credit carryforwards. A full valuation allowance was recorded against the deferred tax assets at December 31, 2013, 2012 and 2011 for the Company’s United States operations.
	The realization of deferred income tax assets is dependent on the generation of taxable income in appropriate jurisdictions during the periods in which those temporary differences are deductible. Management considers the scheduled reversal of deferred income tax liabilities, projected future taxable income, and tax planning strategies in determining the amount of the valuation allowance. Based on the level of historical taxable income and projections for future taxable income over the periods in which the deferred income tax assets are deductible, management determines if it is more likely than not that the Company will not fully realize the benefits of these deductible differences in the United States. As of December 31, 2013, the most significant factors considered in determining the realizability of these deferred tax assets were the Company’s profitability over the past three years and the projected future taxable income of the new acquired companies. Management believes that at this point in time, it is more likely than not that the deferred tax assets will not be fully realized. The Company therefore has recorded a valuation allowance against its deferred tax assets at December 31, 2013.
	As of December 31, 2013, Fulghum owned approximately 88% and 87% of the equity interests in the subsidiaries located in Chile and Uruguay, respectively. Upon acquisition, Fulghum’s management concluded the earnings of these foreign subsidiaries should be taxed at the full United States tax rate and are not permanently reinvested under accounting guidance. As such, the Company provided for a deferred tax liability on the book-tax basis difference through purchase price accounting.
	On May 1, 2013, the Company acquired all of the capital stock of Fulghum. The Company’s purchase price allocation as of May 1, 2013 includes $35.3 million of deferred income taxes. Long-term deferred tax liabilities and other tax liabilities result from identifiable tangible and intangible assets fair value adjustments. These adjustments create excess book basis over the tax basis which is multiplied by the statutory tax rate for the jurisdiction in which the deferred taxes exist. As part of purchase accounting for Fulghum, the Company recorded additional deferred tax liabilities of approximately $15.8 million attributable to identifiable tangible and intangible assets. As of December 31, 2013, deferred tax liabilities related to Fulghum are approximately $37.8 million. In 2013 the Company released a valuation reserve of approximately $27.4 million resulting from recording of deferred tax liabilities of Fulghum.

	The provision (benefit) for income taxes for the calendar years ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011 was as follows:


			For the Calendar Years								For the Three Months			For the Fiscal
			Ended December 31,								Ended December 31,			Year Ended
														September 30,
			2013				2012				2011			2011
			(in thousands)
	Current:
	Federal		$	66			$	104			$	—		$	—
	State			359				1,260				2			3
	Foreign			114				—				—			—

	Total Current			539				1,364				2			3

	Deferred:
	Federal		$	(22,038	)		$	—			$	—		$	—
	State			(5,092	)			—				—			—
	Foreign			—				—				—			—

	Total Deferred			(27,130	)			—				—			—

			$	(26,591	)		$	1,364			$	2		$	3

	A reconciliation of the income taxes at the federal statutory rate to the effective tax rate was as follows:


			For the Calendar Years								For the Three Months			For the Fiscal
			Ended December 31,								Ended December 31,			Year Ended
														September 30,
			2013				2012				2011			2011
			(in thousands)
	Federal income tax benefit calculated at the federal statutory rate		$	(9,009	)		$	9,979			$	(2,730	)	$	(21,885	)
	Impact of foreign earnings			669				—				—			—
	State income tax benefit net of federal benefit			(1,133	)			(830	)			3,882			(3,069	)
	Permanent differences, other			330				375				136			434
	Return to provision			467				—				—			—
	Change in state tax rate			—				1,020				—			(2,164	)
	Minority interest, net of state tax benefit			(624	)			(13,153	)			—			—
	Partnership state taxes			(96	)			303				—			—
	Research and development (“R&D”) credit			(6,191	)			—				—			—
	Basis difference in foreign subsidiaries			374				—				—			—
	Partnership basis difference			(1,022	)			(3,439	)			93,527			—
	Change in valuation allowance			(10,424	)			7,109				(94,813	)		26,687
	Other items			68				—				—			—

	Income tax expense
	From continuing operations		$	(26,591	)		$	1,364			$	2		$	3


	The components of the net deferred tax liability and net deferred tax asset as of December 31, 2013 and 2012 are as follows:


			As of December 31,
			2013				2012
			(in thousands)
	Current:
Accruals for financial statement purposes not allowed for income taxes		$	2,626			$	2,511
Basis difference in prepaid expenses			(344	)			(366	)
Inventory			—				84
Unrealized gain			(12	)			—
Valuation allowance			(1,130	)			(1,463	)

Current, net			1,140				766
Long-Term:
Net operating loss and AMT credit carryforwards		$	55,066			$	42,810
R&D credit carryforward			6,191				—
Basis difference relating to intangibles			(11,336	)			722
Basis difference in property, plant and equipment			(11,421	)			15,770
Stock option exercises			3,344				6,309
Basis difference in foreign subsidiaries			(6,142	)			—
Basis difference in partnership interest			(19,051	)			(29,375	)
Other items			1,652				663
Valuation allowance			(27,574	)			(37,665	)

Long-Term, net		$	(9,271	)		$	(766	)

Total deferred tax liabilities, net		$	(8,131	)		$	—


As of December 31, 2013, the Company had the following available carryforwards and tax attributes to offset future taxable income:


Description		Amount				Expiration
		(in thousands)
Net Operating Losses – Federal		$	136,057			2020 - 2033
Net Operating Losses – States (Post-Apportionment and Pre-tax)
Alabama		$	749			2014 - 2029
California			12,845			2015 - 2031
Colorado			3,363			2027 - 2034
Georgia			567			2021 - 2029
Hawaii			6,101			2024 - 2034
Illinois			93,836			2019 - 2026
Louisiana			66			2020 - 2029
Mississippi			11,765			2019 - 2034
Virginia			161			2034

		$	129,453

R&D federal credit		$	6,981			2016 - 2022
Alternative minimum tax credit		$	1,471			No Expiration
Tax Contingencies
Accounting guidance prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. The guidance requires that the Company recognize in its consolidated financial statements, only those tax positions that are “more-likely-than-not” of being sustained as of the adoption date, based on the technical merits of the position. The Company performed a comprehensive review of its material tax positions in accordance with accounting guidance.
A reconciliation of the beginning and ending amounts of unrecognized tax benefits is as follows:


		As of December 31,
		2013				2012				2011
		(in thousands)
Reconciliation of Unrecognized Tax Liability
Balance at beginning of year		$	2,754			$	2,754			$	2,754
Additions based on tax positions taken during a prior period			3,479				—				—
Additions based on tax positions related to the current period			—				—				—
Reductions based on tax positions related to prior years			(1,965	)			—				—
Settlements with taxing authorities			—				—				—
Lapse of statutes of limitations			—				—				—

Balance at end of year		$	4,268			$	2,754			$	2,754


The additions based on tax positions taken during a prior period relate to the acquisition of Fulghum and to positions taken with respect to the Company’s foreign subsidiary in Uruguay and Chile. The Company is indemnified for these positions by the seller in the Fulghum Acquisition. The reduction in the unrecognized tax liability relates to the Company’s R&D credits. The Company completed an analysis of its R&D expenditures for previous years, and as a result was able to reduce its unrecognized tax liability for certain credits that were deemed to meet the more-likely-than-not threshold.
Of the approximately $4.3 million of unrecognized tax benefits, approximately $1.5 million, if recognized, would have an impact on the effective tax rate. The remaining approximately $2.8 million would not have an impact on the effective tax rate as the Company is indemnified by the seller. The Company believes that it is possible that the unrecognized tax benefits will significantly decrease within the next 12 months, but that the reductions would not impact the Company’s effective tax rate. The amount that is expected to decrease relates to the exposures in connection with the foreign subsidiaries of Fulghum mentioned above. The Company expects that one of the uncertain positions related to Fulghum Uruguay will be settled with the Uruguay taxing authorities. The amount of tax related to this position is approximately $0.9 million. In addition, it is expected that an uncertainty related to an intercompany loan with Fulghum Chile will be remedied by the fall of 2014. The amount related to this uncertainty is approximately $0.7 million. The Company and its subsidiaries are subject to the following material taxing jurisdictions: United States federal, California, Colorado, Illinois, Louisiana, Mississippi and Texas. The tax years that remain open to examination by the United States federal jurisdiction (not including the current year) are years 2010 through 2012; the tax years that remain open to examination by the Illinois, Louisiana and Mississippi jurisdictions are years 2009 through 2012; the tax years that remain open to examination (not including the current year) by the California, Colorado and Texas jurisdictions are years 2008 through 2012. As a result of the Fulghum Acquisition, the Company is now subject to taxation in Alabama, Arkansas, Florida, Maine, North Carolina and South Carolina in the United States as well as in Chile and Uruguay.
In accordance with its accounting policy, the Company recognizes accrued interest and penalties related to unrecognized tax benefits as a component of tax expense. The Company has not accrued any interest and penalties related to uncertain tax positions in the balance sheet or statement of operations as a result of the Company’s net operating loss position.
While management believes the Company has adequately provided for all tax positions, amounts asserted by taxing authorities could materially differ from the Company’s accrued positions as a result of uncertain and complex application of tax regulations. Additionally, the recognition and measurement of certain tax benefits includes estimates and judgment by management and inherently includes subjectivity. Accordingly, additional provisions on federal and state tax-related matters could be recorded in the future as revised estimates are made or the underlying matters are settled or otherwise resolved.

Segment_Information

Segment Information	12 Months Ended
Segment Information	Dec. 31, 2013
Segment Reporting [Abstract]	'
Segment Information	'
	Note 19 — Segment Information
	The Company operated in three business segments prior to the Fulghum Acquisition, the Atikokan Project, the Wawa Project and the winding down of the PDU. The Company now operates in five business segments, as described below. The operations of the Pasadena Facility and Fulghum are included in the Company’s historical results of operations only from the date of the closing of the Agrifos Acquisition and the Fulghum Acquisition, which were November 1, 2012 and May 1, 2013, respectively.

		•		East Dubuque — The operations of the East Dubuque Facility, which produces primarily ammonia and UAN.

		•		Pasadena — The operations of the Pasadena Facility, which produces primarily ammonium sulfate.

		•		Fulghum Fibres — The operations of Fulghum, which provides wood fibre processing services and wood yard operations, sells wood chips to the pulp, paper and packaging industry, and owns and manages forestland and sells bark to industrial consumers in South America.

		•		Wood pellets — This segment includes wood pellet projects owned by the Company, currently the Atikokan Project and Wawa Project, equity in the Rentech/Graanul JV and wood pellet development costs. The wood pellet development costs represent the Company’s personnel costs for employees dedicated to the wood pellet business and other supporting third party costs.

		•		Energy technologies — This segment owns technologies designed to convert low-value, carbon-bearing solids or gases into valuable hydrocarbons and electric power, when combined with certain third party technologies. This segment includes the Company’s research and development activities.

	The Company’s reportable operating segments have been determined in accordance with the Company’s internal management structure, which is organized based on operating activities. The Company evaluates performance based upon several factors, of which the primary financial measure is segment-operating income.


			For the Calendar Years								For the Three Months						For the Fiscal
			Ended December 31,								Ended December 31,						Year Ended
																	September 30,
			2013				2012				2011			2010			2011
			(in thousands)
														(unaudited)
	Revenues
	East Dubuque		$	177,700			$	224,205			$	63,014		$	42,962		$	179,857
	Pasadena			133,675				37,430				—			—			—
	Fulghum Fibres			62,974				—				—			—			—
	Energy technologies			506				290				52			52			206

	Total revenues		$	374,855			$	261,925			$	63,066		$	43,014		$	180,063

	Gross profit (loss)
	East Dubuque		$	80,883			$	133,543			$	25,554		$	16,127		$	76,571
	Pasadena			(9,529	)			(1,704	)			—			—			—
	Fulghum Fibres			12,032				—				—			—			—
	Energy technologies			305				80				2			1			6

	Total gross profit		$	83,691			$	131,919			$	25,556		$	16,128		$	76,577

	Selling, general and administrative expense
	East Dubuque		$	4,576			$	6,242			$	3,336		$	1,431		$	5,786
	Pasadena			4,764				361				—			—			—
	Fulghum Fibres			3,754				—				—			—			—
	Wood pellets			5,479				1,919				—			—			—
	Energy technologies			7,709				4,514				7,162			6,256			22,218

	Total selling, general and administrative expense		$	26,282			$	13,036			$	10,498		$	7,687		$	28,004

	Research and development
	Energy technologies		$	5,747			$	20,944			$	4,202		$	5,426		$	30,009

	Total research and development		$	5,747			$	20,944			$	4,202		$	5,426		$	30,009

	Depreciation and amortization
	East Dubuque		$	191			$	807			$	77		$	112		$	409
	Pasadena			3,886				583				—			—			—
	Fulghum Fibres1			(1,708	)			—				—			—			—
	Wood pellets			26				—				—			—			—
	Energy technologies			122				1,573				489			461			1,816

	Total depreciation and amortization recorded in operating expenses		$	2,517			$	2,963			$	566		$	573		$	2,225

	East Dubuque			9,048				10,690				3,210			2,489			9,611
	Pasadena			4,187				380				—			—			—
Fulghum Fibres			4,836				—				—			—			—

Total depreciation and amortization expense recorded in cost of sales			18,071				11,070				3,210			2,489			9,611

Total depreciation and amortization		$	20,588			$	14,033			$	3,776		$	3,062		$	11,836

Other operating (income) expenses
East Dubuque		$	806			$	510			$	(507	)	$	—		$	522
Pasadena			30,029				—				—			—			—
Fulghum Fibres			72				—				—			—			—
Wood pellets			—				—				—			—			—
Energy technologies			(6,272	)			15,126				583			53			50,851

Total other operating expenses		$	24,635			$	15,636			$	76		$	53		$	51,373

Operating income (loss)
East Dubuque		$	75,310			$	125,984			$	22,648		$	14,584		$	69,854
Pasadena			(48,208	)			(2,648	)			—			—			—
Fulghum Fibres			9,914				—				—			—			—
Wood pellets			(5,505	)			(1,919	)			—			—			—
Energy technologies			(7,001	)			(42,077	)			(12,434	)		(12,195	)		(104,888	)

Total operating income (loss)		$	24,510			$	79,340			$	10,214		$	2,389		$	(35,034	)

Interest (income) expense
East Dubuque		$	—			$	194			$	1,947		$	2,912		$	13,752
Pasadena			8				—				—			—			—
Fulghum Fibres			1,755				—				—			—			—
Energy technologies			(3	)			(1,576	)			2,151			818			2,914

Total interest (income) expense		$	1,760			$	(1,382	)		$	4,098		$	3,730		$	16,666

Net income (loss)
East Dubuque		$	75,244			$	123,721			$	10,455		$	7,096		$	42,341
Pasadena			(48,357	)			(2,648	)			—			—			—
Fulghum Fibres			6,967				—				—			—			—
Wood pellets			(5,180	)			(1,919	)			—			—			—
Energy technologies			(6,891	)			(40,498	)			(14,553	)		(12,980	)		(107,723	)

Total segment net income (loss)		$	21,783			$	78,656			$	(4,098	)	$	(5,884	)	$	(65,382	)

Reconciliation of segment net income (loss) to consolidated net income (loss):
Segment net income (loss)		$	21,783			$	78,656			$	(4,098	)	$	(5,884	)	$	(65,382	)
RNP – partnership and unallocated expenses recorded as selling, general and administrative expenses			(7,945	)			(11,773	)			—			—			—
RNP – partnership and unallocated expenses recorded as other income (expense)			(1,081	)			232				—			—			—
RNP – unallocated interest expense and loss on interest rate swaps			(14,096	)			(2,226	)			—			—			—
RNP – income tax benefit (expense)			303				(303	)			—			—			—
Corporate and unallocated expenses recorded as selling, general and administrative expenses			(24,849	)			(23,432	)			—			—			—
Corporate and unallocated depreciation and amortization expense			(596	)			(791	)			—			—			—
Corporate and unallocated income (expenses) recorded as other income (expense)			19				(2,708	)			—			—			—
Corporate and unallocated interest expense			(532	)			(9,055	)			—			—			—
Corporate income tax benefit (expense)			27,032				(1,063	)			—			—			—
Income from discontinued operations			—				150				—			—			—

Consolidated net income (loss)		$	38			$	27,687			$	(4,098	)	$	(5,884	)	$	(65,382	)


1	Amortization of unfavorable processing agreements exceeds amortization of favorable processing agreements resulting in a credit in depreciation and amortization for Fulghum.


		As of December 31,
		2013				2012
		(in thousands)
Total assets
East Dubuque		$	175,430			$	125,100
Pasadena			188,836				191,279
Fulghum Fibres			188,397				—
Wood pellets			42,089				58
Energy technologies			6,135				10,197

Total segment assets		$	600,887			$	326,634

Reconciliation of segment total assets to consolidated total assets:
Segment total assets		$	600,887			$	326,634
RNP – partnership and other			42,078				60,266
Corporate and other			60,625				92,302

Consolidated total assets		$	703,590			$	479,202


Partnership and unallocated expenses represent costs that relate directly to RNP and its subsidiaries but are not allocated to a segment. Partnership and unallocated expenses recorded in selling, general and administrative expenses consist primarily of business development expenses for RNP; unit-based compensation expense for executives of RNP; services from the Company for executive, legal, finance, accounting, human resources and investor relations support in accordance with the services agreement between RNP and the Company; audit and tax fees; legal fees; compensation for RNP partnership level personnel; board expense; and certain insurance costs. Partnership and unallocated expenses recorded in other expense represent primarily loss on debt extinguishment partially offset by fair value adjustment to earn-out consideration. Unallocated interest expense represents primarily interest expense on the RNP Notes. Corporate and unallocated expenses represent costs that relate directly to Rentech and its non-RNP subsidiaries but are not allocated to a segment. Corporate and unallocated expenses recorded in operating expenses consist primarily of selling, general and administrative expenses and depreciation and amortization. For the years ended December 31, 2013 and 2012, corporate and unallocated interest expense consists primarily of interest expense on the RNHI Revolving Loan and the convertible debt, which was completely redeemed for cash on December 31, 2012, respectively.
The Company’s revenue by geographic area, based on where the customer takes title to the product, was as follows:


		For Calendar Years
		Ended December 31,
		2013				2012
		(in thousands)
United States		$	352,514			$	261,925
Other			22,341				—

Total revenues		$	374,855			$	261,925

The following table sets forth assets by geographic area:


		As of
		December 31,				December 31,
		2013				2012
		(in thousands)
United States		$	633,886			$	479,202
Other			69,704				—

Total assets		$	703,590			$	479,202

Net_Income_Loss_Per_Common_Sha

Net Income (Loss) Per Common Share Attributable To Rentech	12 Months Ended
Net Income (Loss) Per Common Share Attributable To Rentech	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Net Income (Loss) Per Common Share Attributable To Rentech	'
	Note 20 — Net Income (Loss) Per Common Share Attributable To Rentech
	For the calendar years ended December 31, 2013 and 2012, the three months ended December 31, 2011 and 2010 and the fiscal year ended September 30, 2011, approximately 16.1 million, 16.7 million, 41.3 million, 40.8 million and 40.5 million shares, respectively, of Rentech’s common stock issuable pursuant to stock options, stock warrants, restricted stock units and convertible debt were excluded from the calculation of diluted income (loss) per share because their inclusion would have been anti-dilutive.

Selected_Quarterly_Financial_D

Selected Quarterly Financial Data (Unaudited)	12 Months Ended
Selected Quarterly Financial Data (Unaudited)	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]	'
Selected Quarterly Financial Data (Unaudited)	'

	Note 21 — Selected Quarterly Financial Data (Unaudited)

	Selected unaudited condensed consolidated financial information for the calendar years ended December 31, 2013 and 2012 is presented in the tables below (in thousands, except per share data).



		First			Second			Third			Fourth
		Quarter			Quarter			Quarter			Quarter
	For the 2013 Calendar Year
	Revenues	$	59,667		$	120,153		$	115,762		$	79,273
	Gross profit (loss)	$	22,772		$	42,314		$	21,199		$	(2,594	)
	Operating income (loss)	$	2,068		$	25,074		$	(20,216	)	$	(15,806	)
	Income (loss) from continuing operations	$	786		$	44,306		$	(23,578	)	$	(21,476	)
	Net income (loss)	$	786		$	44,306		$	(23,578	)	$	(21,476	)
	Net (income) loss attributable to noncontrolling interests	$	(6,026	)	$	(11,474	)	$	8,985		$	6,945
	Net income (loss) attributable to Rentech	$	(5,240	)	$	32,832		$	(14,593	)	$	(14,531	)
	Net income (loss) per common share allocated to Rentech:
	Basic and diluted:
	Continuing operations	$	(0.02	)	$	0.14		$	(0.06	)	$	(0.06	)
	Discontinued operations	$	0		$	0		$	0		$	0

	Net income (loss)	$	(0.02	)	$	0.14		$	(0.06	)	$	(0.06	)


		First			Second			Third			Fourth
		Quarter			Quarter			Quarter			Quarter
	For the 2012 Calendar Year
	Revenues	$	38,588		$	70,707		$	60,170		$	92,460
	Gross profit	$	22,635		$	45,655		$	35,040		$	28,589
	Operating income (loss)	$	6,578		$	29,448		$	16,604		$	(9,286	)
	Income (loss) from continuing operations	$	4,326		$	25,679		$	15,443		$	(17,911	)
	Income from discontinued operations, net of tax	$	—		$	—		$	134		$	16
	Net income (loss)	$	4,326		$	25,679		$	15,577		$	(17,895	)
	Net (income) attributable to noncontrolling interests	$	(7,590	)	$	(16,159	)	$	(11,307	)	$	(6,631	)
	Net income (loss) attributable to Rentech	$	(3,264	)	$	9,520		$	4,270		$	(24,526	)
	Net income (loss) per common share allocated to Rentech:
	Basic and diluted:
	Continuing operations	$	(0.01	)	$	0.04		$	0.02		$	(0.11	)
	Discontinued operations	$	0		$	0		$	0		$	0

	Net income (loss)	$	(0.01	)	$	0.04		$	0.02		$	(0.11	)


	The gross loss during the three months ended December 31, 2013 was primarily attributable to (i) turnaround expenses at the East Dubuque Facility and the Pasadena Facility of approximately $7.8 million and $1.7 million, respectively, (ii) a write-down of the Pasadena Facility’s inventory of approximately $5.1 million, (iii) fixed operating costs while the East Dubuque Facility was idle of approximately $4.2 million, and (iv) the $1.0 million insurance deductible for the fire which occurred in November 2013 at the East Dubuque Facility.

Subsequent_Events

Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2013
Subsequent Events [Abstract]	'
Subsequent Events	'
	Note 22 — Subsequent Events
	On February 13, 2014, RNP announced a cash distribution to its common unitholders for the period October 1, 2013 through and including December 31, 2013 of $0.05 per common unit which resulted in total distributions in the amount of approximately $2.0 million, including payments to phantom unitholders. RNHI received a distribution of approximately $1.2 million, representing its share of distributions based on its ownership of common units. The cash distribution was paid on February 28, 2014 to unitholders of record at the close of business on February 24, 2014.
	On March 7, 2014 the Borrowers entered into the First Amendment to the 2013 RNP Credit Agreement (the “First RNP Amendment”). The First RNP Amendment replaces in certain circumstances the financial test that the Borrowers must satisfy for any borrowing from the Secured Leverage Ratio to a Fixed Charge Coverage Ratio (each as defined in the 2013 RNP Credit Agreement) for the period from the date of the amendment until immediately prior to the time RNP reports its fiscal year 2014 annual results (the “FCCR End Date”). The Fixed Charge Coverage Ratio that the Borrowers have to meet from the date of the First RNP Amendment through the date immediately prior to the time RNP reports its 2014 first quarter results is 2.00 to 1.00, and thereafter through the FCCR End Date is 2.25 to 1.00. For the year ended December 31, 2013, RNP’s Fixed Charge Coverage Ratio was 3.27 to 1.00.
	The First RNP Amendment also modifies for a specified period the financial test applicable to the announcement or payment of a distribution. In the event that RNP has no amounts outstanding under the 2013 RNP Credit Agreement on the date of the announcement or payment of an RNP distribution, the minimum Fixed Charge Coverage Ratio that it has to meet in order to pay distributions in the period from the date of the First RNP Amendment through the date immediately prior to reporting RNP’s 2014 first quarter results is 2.00 to 1.00, and thereafter through the FCCR End Date is 2.25 to 1.00. If there is any amount outstanding under the 2013 RNP Credit Agreement on the date of the announcement or payment of a distribution from the period beginning with the date of the First RNP Amendment through the FCCR End Date, RNP must have a Secured Leverage Ratio not in excess of 3.75 to 1.00. Following the FCCR End Date, to announce or pay a distribution RNP must have a Secured Leverage Ratio not in excess of 3.75 to 1.00. In addition, before RNP can make distributions, RNP must have at least $8.75 million available to be drawn under the 2013 RNP Credit Agreement on a pro forma basis.
	In March 2014, the Company announced that it had entered into a definitive agreement with Sunshine Kaidi New Energy Group Co., Ltd. (“Kaidi”) to sell its alternative energy technologies and decommissioned PDU. The transaction provides the Company at closing with an initial cash purchase price for our technology and equipment of $15.3 million, and the possibility of a success payment of up to $16.2 million.
	Closing of the transaction with Kaidi, which is expected in mid-2014, is subject to customary conditions, including regulatory approvals in the United States and the People’s Republic of China. The Company will recognize a gain on the transaction when consummated. The transaction may result in the energy technologies segment being reflected as a discontinued operation starting in 2014.

Schedule_II_Valuation_and_Qual

Schedule II - Valuation and Qualifying Accounts	12 Months Ended
Schedule II - Valuation and Qualifying Accounts	Dec. 31, 2013
Valuation And Qualifying Accounts [Abstract]	'
Schedule II - Valuation and Qualifying Accounts	'
	SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS


		Balance at		Charged to		Deductions and			Balance at
		Beginning		Expense		Write-Offs			End of Period
		of Period
		(in thousands)
	Calendar Year Ended December 31, 2013
	Deferred tax valuation account	$	39,128	$	—	$	(10,424	)	$	28,704
	Calendar Year Ended December 31, 2012
	Allowance for doubtful accounts	$	100	$	—	$	(100	)	$	—
	Deferred tax valuation account	$	32,018	$	—	$	7,110		$	39,128
	Reserve for REN earn-out	$	697	$	—	$	(697	)	$	—
	Three Months Ended December 31, 2011
	Allowance for doubtful accounts	$	100	$	—	$	—		$	100
	Deferred tax valuation account	$	126,831	$	—	$	94,813		$	32,018
	Reserve for REN earn-out	$	697	$	—	$	—		$	697
	Year Ended September 30, 2011
	Allowance for doubtful accounts	$	100	$	—	$	—		$	100
	Deferred tax valuation account	$	100,144	$	26,687	$	—		$	126,831
	Reserve for REN earn-out	$	697	$	—	$	—		$	697

Summary_of_Certain_Significant1

Summary of Certain Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2013

Accounting Policies [Abstract]

Principles of Consolidation

Subsequent Events

The Company has evaluated events occurring between December 31, 2013 and the date of these financial statements to ensure that such events are properly reflected in these statements.

Use of Estimates

Revenue Recognition

East Dubuque and Pasadena Policy

East Dubuque Contracts

Pasadena Contracts

Fulghum Fibres Contracts

Deferred Revenue

Cost of Sales

Accounting for Derivative Instruments

Research and Development Expenses

Cash

The Company has checking and savings accounts with major financial institutions. At times balances with these institutions may be in excess of federally insured limits.

Accounts Receivable

Accounts and Other Receivables

Inventories

Property, Plant and Equipment

Type of Asset

Estimated Useful Life

Building and building improvements

4-40 years

Land improvements

5-20 years

Machinery and equipment

7-22 years

Furniture, fixtures and office equipment

3-10 years

Computer equipment and software

2-5 years

Vehicles

2-15 years

Leasehold improvements

Useful life or remaining lease term whichever is shorter

Ammonia catalyst

3-10 years

Platinum catalyst

Based on units of production

The Company has recorded asset retirement obligations (“AROs”) related to future costs associated with (i) the removal of contaminated material at the former phosphorous plant at the Pasadena Facility and handling (ii) disposal of asbestos at the East Dubuque Facility and (iii) removal of machinery and equipment at Fulghum mills on leased property. The fair value of a liability for an ARO is recorded in the period in which it is incurred and the cost of such liability increases the carrying amount of the related long-lived asset by the same amount. The liability is accreted each period through charges to operating expense and the capitalized cost is depreciated over the remaining useful life of the asset. The liability at December 31, 2013 and 2012 was approximately $3.0 million and $3.1 million.

Construction in Progress

Property Held for Sale

Acquisition Method of Accounting

Goodwill

Intangible Assets

Intangible assets consist of the following at December 31, 2013 and 2012 (amounts in thousands):

2013

2012

Average Life

Trade names

5,496

—

Indefinite

Wood chip processing agreements

29,765

—

17-Jan

Off-take contract

2,811

—

Technologies to produce fertilizers

23,680

Fertilizer marketing agreements

3,088

1.5

Intangibles, gross

64,840

26,768

Less: accumulated amortization

(5,110

)

(583

)

Intangibles, net

59,730

26,185

The amortization of the assets will result in amortization expense of approximately $4.3 million in 2014 and $4.4 million for each of the next four years thereafter.

Income Taxes

Net Income (Loss) Per Common Share Allocated To Rentech

Comprehensive Income (Loss)

Variable Interest Entities

Recent Accounting Pronouncements

Summary_of_Certain_Significant2

Summary of Certain Significant Accounting Policies (Tables)	12 Months Ended
Summary of Certain Significant Accounting Policies (Tables)	Dec. 31, 2013
Accounting Policies [Abstract]	'
Property, Plant and Equipment Stated at Cost Less Accumulated Depreciation	'
	Property, plant and equipment is stated at cost less accumulated depreciation. Depreciation expense is calculated using the straight-line method over the estimated useful lives of the assets, except for platinum catalyst, as follows:


	Type of Asset	Estimated Useful Life
	Building and building improvements	4-40 years
	Land improvements	5-20 years
	Machinery and equipment	7-22 years
	Furniture, fixtures and office equipment	3-10 years
	Computer equipment and software	2-5 years
	Vehicles	2-15 years
	Leasehold improvements	Useful life or remaining lease term whichever is shorter
	Ammonia catalyst	3-10 years
	Platinum catalyst	Based on units of production
Summary of Intangible Assets	'
	Intangible assets consist of the following at December 31, 2013 and 2012 (amounts in thousands):


		2013			2012			Average Life
	Trade names	$	5,496		$	—			Indefinite
	Wood chip processing agreements		29,765			—			17-Jan
	Off-take contract		2,811			—			10
	Technologies to produce fertilizers		23,680			23,680			20
	Fertilizer marketing agreements		3,088			3,088			1.5

	Intangibles, gross	$	64,840		$	26,768
	Less: accumulated amortization		(5,110	)		(583	)

	Intangibles, net	$	59,730		$	26,185

Acquisition_Tables

Acquisition (Tables)	12 Months Ended
Acquisition (Tables)	Dec. 31, 2013
Purchase Price	'
	The purchase price consisted of the following (amounts in thousands):


	Cash (through borrowings under a previous credit agreement) less working capital adjustments		$	136,308
	Fair market value of 538,793 Common Units issued			20,000
	Estimate of potential earn-out consideration(1)			4,920

	Total purchase price		$	161,228


	-1	The amount of earn-out consideration reflected in the table above reflects the Company’s estimate, as of November 1, 2012, of the amount of the earn-out consideration RNP will be required to pay pursuant to the Purchase Agreement, as defined in Note 6 — Fair Value. The earn-out consideration will be measured at each reporting date with changes in its fair value recognized in the consolidated statements of operations. As of December 31, 2013, the fair value of the potential earn-out consideration was $0.
Fulghum [Member]	'
Final Purchase Price Allocation	'
	The Company’s preliminary purchase price allocation as of May 1, 2013 is as follows (amounts in thousands):


	Cash		$	10,137
	Accounts receivable			3,936
	Inventories			2,389
	Prepaid expenses and other current assets			952
	Other receivables, net			5,435
	Property, plant and equipment			94,382
	Intangible assets (Trade name - $5,496 and Processing agreements - $29,765)			35,261
	Goodwill			29,932
	Other assets			2,974
	Accounts payable			(6,547	)
	Accrued liabilities			(5,823	)
	Customer deposits			(1,059	)
	Asset retirement obligation			(178	)
	Credit facility and loans			(61,865	)
	Unfavorable processing agreements			(6,496	)
	Deferred income taxes			(35,262	)
	Noncontrolling interests			(4,000	)

	Total preliminary purchase price		$	64,168

Agrifos [Member]	'
Final Purchase Price Allocation	'
	RNP’s final purchase price allocation as of November 1, 2012 is as follows (amounts in thousands):


	Cash		$	2,622
	Accounts receivable			3,204
	Inventories			30,373
	Prepaid expenses and other current assets			566
	Property, plant and equipment			68,688
	Construction in progress			7,011
	Intangible assets (Technology—$23,680 and Marketing Agreement—$3,088)			26,768
	Goodwill			57,231
	Other assets			73
	Accounts payable			(10,638	)
	Accrued liabilities			(6,640	)
	Customer deposits			(13,301	)
	Asset retirement obligation			(2,776	)
	Other long-term liabilities			(1,953	)

	Total purchase price		$	161,228

Pro_Forma_Information_Tables

Pro Forma Information (Tables)	12 Months Ended
Pro Forma Information (Tables)	Dec. 31, 2013
Text Block [Abstract]	'
Pro Forma Information	'
	The unaudited pro forma information has been prepared as if the Fulghum Acquisition and the Agrifos Acquisition, as defined in Note 3 — Fulghum Acquisition and Note 4 — Agrifos Acquisition, had taken place on January 1, 2012. The unaudited pro forma information is not necessarily indicative of the results that the Company would have achieved had the transactions actually taken place on January 1, 2012, and the unaudited pro forma information does not purport to be indicative of future financial operating results.


			For the Calendar Year Ended
			December 31, 2013
			As Reported			Pro Forma			Pro Forma
			As Reported			Adjustments			Pro Forma
			(in thousands)
	Revenues		$	374,855		$	36,683		$	411,538
	Net income (loss)(1)		$	38		$	(27,332	)	$	(27,294	)
	Net loss attributable to Rentech		$	(1,532	)	$	(27,467	)	$	(28,999	)
	Basic net loss per common share attributable to Rentech		$	(0.01	)	$	(0.12	)	$	(0.13	)
	Diluted net loss per common share attributable to Rentech		$	(0.01	)	$	(0.12	)	$	(0.13	)



			For the Calendar Year Ended
			December 31, 2012
			As Reported			Pro Forma			Pro Forma
			As Reported			Adjustments			Pro Forma
			(in thousands)
	Revenues		$	261,925		$	226,346		$	488,271
	Net income(1)		$	27,687		$	29,137		$	56,824
	Net income (loss) attributable to Rentech		$	(14,000	)	$	29,573		$	15,573
	Basic net income (loss) per common share attributable to Rentech		$	(0.06	)	$	0.13		$	0.07
	Diluted net income (loss) per common share attributable to Rentech		$	(0.06	)	$	0.13		$	0.07

	-1	As discussed in Note 18 — Income Taxes, during the calendar year ended December 31, 2013, there was a release of a valuation allowance resulting from recording deferred tax liabilities from the Fulghum Acquisition. Since the pro forma information is presented as if the transaction had taken place on January 1, 2012, the release of the valuation allowance is included in the pro forma results for the calendar year ended December 31, 2012 and excluded from the pro forma results for the calendar year ended December 31, 2013.

Fair_Value_Tables

Fair Value (Tables)	12 Months Ended
Fair Value (Tables)	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Disclosure	'
	The following table presents the financial instruments that require fair value disclosure as of December 31, 2013.


		Fair Value								Carrying
		Fair Value								Value
		(in thousands)
		Level 1			Level 2			Level 3
	Liabilities
	RNP Notes	$	318,400		$	—		$	—	$	320,000
	Fulghum debt		—			45,970			—		47,452
	RNHI Revolving Loan		—			50,000			—		50,000
	QS Construction Facility		—			4,527			—		4,527
	Earn-out consideration		—			—			1,544		1,544
	The following table presents the financial instruments that require fair value disclosure as of December 31, 2012.


		Fair Value								Carrying
		Fair Value								Value
		(in thousands)
		Level 1			Level 2			Level 3
	Liabilities
	Credit facilities and term loan	$	—		$	193,290		$	—	$	193,290
	Interest rate swaps		—			929			—		929
	Earn-out consideration		—			—			4,920		4,920
Net Loss on Interest Rate Swaps	'
	Net loss on interest rate swaps:


		For the Calendar Years Ended
		December 31,
		2013			2012
		(in thousands)
	Realized loss	$	(24	)	$	(22	)
	Unrealized gain (loss)		17			(929	)

	Total net loss on interest rate swaps	$	(7	)	$	(951	)

Inventories_Tables

Inventories (Tables)	12 Months Ended
Inventories (Tables)	Dec. 31, 2013
Inventory Disclosure [Abstract]	'
Inventories	'
	Inventories consisted of the following:


		As of December 31,
		2013		2012
		(in thousands)
	Finished goods	$	27,638	$	21,756
	Raw materials		7,448		5,269
	Other		290		115

	Total inventory	$	35,376	$	27,140

Property_Plant_and_Equipment_T

Property, Plant and Equipment (Tables)	12 Months Ended
Property, Plant and Equipment (Tables)	Dec. 31, 2013
Property Plant And Equipment [Abstract]	'
Property, Plant and Equipment	'
	Property, plant and equipment consisted of the following:


		As of December 31,
		2013			2012
		(in thousands)
	Land and land improvements	$	26,149		$	22,988
	Buildings and building improvements		33,096			27,120
	Machinery and equipment and catalysts		334,645			135,636
	Furniture, fixtures and office equipment		1,137			1,085
	Computer equipment and computer software		7,977			5,981
	Vehicles		4,624			309
	Leasehold improvements		2,348			114
	Other		210			210

			410,186			193,443
	Less: accumulated depreciation		(75,526	)		(59,248	)

	Total property, plant and equipment, net	$	334,660		$	134,195

Construction in Progress	'
	Construction in progress consisted of the following:


		As of December 31,
		2013			2012
		(in thousands)
	East Dubuque Facility		2,195			52,435
	Pasadena Facility		31,335			8,512
	Fulghum Fibres		273			—
	Wawa Project		17,007			—
	Atikokan Project		8,458			—
	Other		868			470

	Total construction in progress	$	60,136		$	61,417

Goodwill_Tables

Goodwill (Tables)	12 Months Ended
Goodwill (Tables)	Dec. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract]	'
Reconciliation of Change in Carrying Value of Goodwill	'
	A reconciliation of the change in the carrying value of goodwill is as follows (in thousands):


	Balance at December 31, 2011	$	7,209
	Agrifos Acquisition		56,592
	Goodwill impairment – energy technologies		(7,209	)

	Balance at December 31, 2012	$	56,592
	Increase attributable to Pasadena		639
	Fulghum Acquisition		29,932
	Goodwill impairment – Pasadena		(30,029	)

	Balance at December 31, 2013	$	57,134

Impairments_Tables

Impairments (Tables)	12 Months Ended
Impairments (Tables)	Dec. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract]	'
Financial Impact Recorded in Statement of Operations	'
	The financial impact recorded in the fiscal year ended September 30, 2011 statement of operations is as follows:


	Project	Loss on
	Project	Impairments
		(in thousands)
	Rialto Project	$	(27,238	)
	Natchez Project		(26,645	)
	Port St. Joe Project		(4,806	)
	Miscellaneous		(53	)

	Total	$	(58,742	)

Debt_Tables

Debt (Tables)	12 Months Ended
Debt (Tables)	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Long-term Debt	'
	Fulghum debt at December 31, 2013 consisted of the following (in thousands):


	Outstanding debt	$	45,290
	Plus: unamortized premium		2,162

	Total debt		47,452
	Less: current portion		(8,401	)

	Long-term debt	$	39,051

Summary of Total Debt	'
	As of December 31, 2013, the Company was in compliance with all covenants under the RNP Notes, Fulghum debt, RNHI Revolving Loan and the 2013 RNP Credit Agreement. Total debt consisted of the following:


		As of December 31,
		2013			2012
		(in thousands)
	Second 2012 Credit Agreement	$	—		$	193,290
	RNP Notes		320,000			—
	Fulghum debt		47,452			—
	RNHI Revolving Loan		50,000			—
	QS Construction Facility		4,527			—

	Total debt	$	421,979		$	193,290
	Less: current portion		(9,916	)		(7,750	)

	Long-term debt	$	412,063		$	185,540

Future Maturities of Long-term Debt	'
	Future maturities of total debt are as follows (in thousands):


	For the Calendar Years Ending December 31
	2014	$	9,916
	2015		7,324
	2016		55,535
	2017		4,285
	2018		1,636
	Thereafter		343,283

		$	421,979

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
Commitments and Contingencies (Tables)	Dec. 31, 2013
Commitments And Contingencies Disclosure [Abstract]	'
Commitments for Natural Gas Purchases	'
	Commitments for natural gas purchases consist of the following:

		As of December 31,
		2013		2012
		(in thousands,
		except weighted
		average rate)
	MMBtus under fixed-price contracts		2,071		1,955
	MMBtus under index-price contracts		81		143

	Total MMBtus under contracts		2,152		2,098

	Commitments to purchase natural gas	$	8,571	$	7,531
	Weighted average rate per MMBtu based on the fixed rates and the indexes applicable to each contract	$	3.98	$	3.59
Summary of Future Minimum Lease Payments	'
	Future minimum lease payments as of December 31, 2013 are as follows (in thousands):


	For the Calendar Years Ending December 31,
	2014	$	3,382
	2015		3,631
	2016		2,656
	2017		2,117
	2018 and thereafter		14,874

		$	26,660

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	12 Months Ended
Stockholders' Equity (Tables)	Dec. 31, 2013
Equity [Abstract]	'
Performance Shares and Restricted Stock Units Issued by the Company	'
	During the calendar years ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011, the Company issued the following performance shares and restricted stock units:


		Number of Awards
		For the Calendar Years				For the Three		For the Fiscal
		Ended December 31,				Months Ended		Year Ended
						December 31,		September 30,
		2013		2012		2011		2011
	Type of Award
	Performance awards		3,005,000		1,963,000		2,960,000		—
	Time-vested awards		1,994,000		1,136,000		3,508,000		2,195,000

	Total		4,999,000		3,099,000		6,468,000		2,195,000

Accounting_for_Equity_Based_Co1

Accounting for Equity Based Compensation (Tables)	12 Months Ended
Accounting for Equity Based Compensation (Tables)	Dec. 31, 2013
Charges Associated with All Equity Based Grants	'
	During the calendar years ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011, charges associated with all equity-based grants were recorded as follows:


		For the Calendar						For the Three			For the Fiscal
		Years Ended						Months Ended			Year Ended
		December 31,						December 31,			September 30,
		2013			2012			2011			2011
		(in thousands)
	Compensation expense	$	5,319		$	7,357		$	1,015		$	1,063
	Board compensation expense		603			591			50			604

	Total compensation expense		5,922			7,948			1,065			1,667
	Consulting expense		18			74			9			62

	Total expense	$	5,940		$	8,022		$	1,074		$	1,729

	Reduction to both basic and diluted earnings per share from compensation expense	$	0.03		$	0.04		$	—		$	0.01
Fair Value of Options and Warrants	'
	The Company uses the Black-Scholes option pricing model to determine the weighted average fair value of options and warrants. The assumptions utilized to determine the fair value of options and warrants are indicated in the following table:


		For the Calendar						For the Three		For the Fiscal
		Years Ended						Months Ended		Year Ended
		December 31,						December 31,		September 30,
		2013			2012			2011		2011
	Risk-free interest rate		—			—		1.16% - 1.74%		1.55% - 2.69%
	Expected volatility		—			—		104.00%		97.0% - 98.0%
	Expected life (in years)		—			—		6.00 - 8.00		5.00 - 8.00
	Dividend yield		—			—		0.00%		0.00%
	Forfeiture rate		—			—		14.00%		0.0% - 8.0%
Number of Shares Reserved, Outstanding and Available for Issuance	'
	The number of shares reserved, outstanding and available for issuance are as follows:


		Shares Reserved			Shares Underlying						Shares Available for Issuance
		as of December 31,			Outstanding Awards as of						as of December 31,
					December 31,
		2013			2013			2012			2013		2012
	Name of Plan	(in thousands)
	2005 Stock Option Plan		1,000			195			195			—		—
	2006 Incentive Award Plan:
	Stock options		8,000			1,338			1,710			—		67
	Restricted stock units and performance share awards					1,322			1,745			—		—
	2009 Incentive Award Plan:
	Stock options		32,900			1,713			2,255			4,483		3,513
	Restricted stock units and performance share awards					9,991			9,223			—		—
	Adjustment for Special Distribution		312			244			312			—		—

			42,212			14,803			15,440			4,483		3,580
	Restricted stock units not from a plan		1,225			17			33			—		—

			43,437			14,820			15,473			4,483		3,580
Equity Option [Member]	'
Charges Associated with Equity Based Compensation	'
	During the calendar years ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011, charges associated with stock option grants were recorded as follows:


		For the Calendar Years						For the Three			For the Fiscal
		Ended December 31,						Months Ended			Year Ended
								December 31,			September 30,
		2013			2012			2011			2011
					(in thousands)
	Compensation expense	$	516		$	658		$	216		$	632
	Board compensation expense		—			—			—			129

	Total compensation expense		516			658			216			761
	Consulting expense		18			22			9			30

	Total expense	$	534		$	680		$	225		$	791

Equity Based Compensation Transactions	'
	Option transactions during the calendar years ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011 are summarized as follows:

		Number of			Weighted			Aggregate
		Shares			Average			Intrinsic
					Exercise			Value
					Price
	Outstanding at September 30, 2010		2,407,000		$	2.9
	Granted		3,217,000			0.96
	Exercised		—
	Canceled / Expired		(689,000	)		2.06

	Outstanding at September 30, 2011		4,935,000			1.75
	Granted		50,000			1.58
	Exercised		(32,000	)		0.95
	Canceled / Expired		(281,000	)		3.67

	Outstanding at December 31, 2011		4,672,000			1.64
	Granted		—			—
	Exercised		(276,000	)		1.1
	Canceled / Expired		(236,000	)		1.89
	Adjustment for Special Distribution		312,000

	Outstanding at December 31, 2012		4,472,000			1.67		$	5,848,000
	Granted		—			—
	Exercised		(711,000	)		1.03
	Canceled / Expired		(271,000	)		2.4

	Outstanding at December 31, 2013		3,490,000		$	1.59		$	2,144,448

	Options exercisable at December 31, 2013		3,436,000		$	1.6		$	2,110,045
	Options exercisable at December 31, 2012		3,485,000		$	1.73
	Options exercisable at December 31, 2011		2,739,000		$	2.11
	Options exercisable at September 30, 2011		2,116,000		$	2.81
	Weighted average fair value of options granted during the three months ended December 31, 2011				$	1.32
	Weighted average fair value of options granted during the fiscal year ended September 30, 2011				$	0.78
Summary of Options and Warrants Outstanding and Exercisable	'
	The following information summarizes stock options outstanding and exercisable at December 31, 2013:


		Outstanding									Exercisable
					Weighted Average			Weighted					Weighted
					Remaining			Average					Average
		Number			Contractual Life			Exercise			Number		Exercise
	Range of Exercise Prices	Outstanding			in Years			Price			Exercisable		Price
	$0.56-$0.92		2,193,000			6.6		$	0.88			2,166,000	$	0.88
	$0.96-$1.00		27,000			7.49			0.96			18,000		0.96
	$1.12-$1.51		493,000			2.72			1.31			475,000		1.3
	$2.07-$2.50		32,000			2.31			2.07			32,000		2.07
	$3.50-$3.50		21,000			2.95			3.5			21,000		3.5
	$3.87-$4.00		724,000			2.55			3.88			724,000		3.88

			3,490,000			5.16		$	1.6			3,436,000	$	1.6

Warrants [Member]	'
Charges Associated with Equity Based Compensation	'
	During the calendar years ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011, charges associated with grants of warrants were recorded as follows:


		For the Calendar						For the Three			For the Fiscal
		Years Ended						Months Ended			Year Ended
		December 31,						December 31,			September 30,
		2013			2012			2011			2011
								(in thousands)
	Compensation expense	$	—		$	—		$	6		$	26
	Board compensation expense		—			—			—			—

	Total compensation expense	$	—		$	—		$	6		$	26

Equity Based Compensation Transactions	'
	Warrant transactions during the calendar years ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011 are summarized as follows:


		Number of			Weighted
		Shares			Average
					Exercise
					Price
	Outstanding at September 30, 2010		12,596,000		$	1.89
	Granted		1,980,000			0.99
	Exercised		—			—
	Canceled / Expired		—			—

	Outstanding at September 30, 2011		14,576,000		$	1.77
	Granted		—			—
	Vested		394,000			1.82
	Exercised		(2,464,000	)		0.91
	Canceled / Expired		(2,082,000	)		1.82

	Outstanding at December 31, 2011		10,424,000		$	1.96
	Granted		—			—
	Vested		—			—
	Exercised		(5,156,000	)		1.27
	Canceled / Expired		(4,018,000	)		3.28

	Outstanding at December 31, 2012		1,250,000		$	0.57
	Granted		—			—
	Vested		—			—
	Exercised		—			—
	Canceled / Expired		—			—

	Outstanding at December 31, 2013		1,250,000		$	0.57

	Warrants exercisable at December 31, 2013		1,250,000		$	0.57
	Warrants exercisable at December 31, 2012		1,250,000		$	0.57
	Warrants exercisable at December 31, 2011		10,424,000		$	1.96
	Warrants exercisable at September 30, 2011		14,576,000		$	1.77
	Weighted average fair value of warrants granted during the fiscal year ended September 30, 2011				$	0.64
Summary of Options and Warrants Outstanding and Exercisable	'
	The following information summarizes warrants outstanding and exercisable at December 31, 2013:


		Outstanding									Exercisable
					Weighted Average			Weighted					Weighted
					Remaining			Average					Average
		Number			Contractual Life			Exercise			Number		Exercise
	Range of Exercise Prices	Outstanding			in Years			Price			Exercisable		Price
	$0.57		1,250,000			9.25		$	0.57			1,250,000	$	0.57
Restricted Stock Units and Performance Share Award [Member]	'
Charges Associated with Equity Based Compensation	'
	During the calendar years ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011, charges associated with RSUs and Performance Share Award grants were recorded as follows:


		For the Calendar						For the Three			For the Fiscal
		Years Ended						Months Ended			Year Ended
		December 31,						December 31,			September 30,
		2013			2012			2011			2011
		(in thousands)
	Compensation expense	$	4,803		$	6,699		$	793		$	405
	Board compensation expense		202			190			50			75

	Total compensation expense	$	5,005		$	6,889		$	843		$	480

Equity Based Compensation Transactions	'
	RSU and Performance Share Award transactions during the calendar year ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011 are summarized as follows:


		Number of			Weighted			Aggregate
		Shares			Average			Intrinsic
					Grant Date			Value
					Fair Value
	Outstanding at September 30, 2010		7,560,000			1.3
	Granted		2,195,000			0.98
	Vested and Settled in Shares		(1,212,000	)		1.35
	Vested and Surrendered for Withholding Taxes Payable		(578,000	)		1.33
	Canceled / Expired		(1,342,000	)		1.3

	Outstanding at September 30, 2011		6,623,000			1.18
	Granted		6,468,000			1.5
	Vested and Settled in Shares		(739,000	)		1.08
	Vested and Surrendered for Withholding Taxes Payable		(371,000	)		1.09
	Canceled / Expired		(93,000	)		1.12

	Outstanding at December 31, 2011		11,888,000			1.37
	Granted		3,099,000			2.55
	Vested and Settled in Shares		(2,080,000	)		1.35
	Vested and Surrendered for Withholding Taxes Payable		(975,000	)		1.4
	Canceled / Expired		(931,000	)		1.37

	Outstanding at December 31, 2012		11,001,000			1.71		$	28,934,000
	Granted		4,999,000			1.66
	Vested and Settled in Shares		(2,680,000	)		1.49
	Vested and Surrendered for Withholding Taxes Payable		(1,812,000	)		1.37
	Canceled / Expired		(178,000	)		2.18

	Outstanding at December 31, 2013		11,330,000			1.76		$	23,793,000

Restricted Stock Units and Performance Share Award [Member] \| 2011 LTIP [Member]	'
Charges Associated with Equity Based Compensation	'
	During the calendar years ended December 31, 2013 and 2012 and the three months ended December 31, 2011, charges associated with all equity-based grants issued by RNP under the 2011 LTIP were recorded as follows:


		For the Calendar Years						For the Three Months
		Ended December 31,						Ended December 31,
		2013			2012			2011
		(in thousands)
	Stock based compensation expense	$	1,460		$	2,827		$	63

Phantom Share Units (PSUs) [Member]	'
Equity Based Compensation Transactions	'
	Phantom unit transactions during the calendar years ended December 31, 2013 and 2012 and the three months ended December 31, 2011 are summarized as follows:


		Number of			Weighted			Aggregate
		Shares			Average			Intrinsic
					Grant Date			Value
					Fair Value
	Granted		163,388		$	18.4

	Outstanding at December 31, 2011		163,388			18.4
	Granted		54,059			34.86
	Vested and Settled in Shares		(42,350	)		(15.68	)
	Vested and Surrendered for Withholding Taxes Payable		(20,040	)		(18.40	)
	Canceled / Expired		(119	)		(18.40	)

	Outstanding at December 31, 2012		154,938		$	23.78		$	5,839,626
	Granted		116,508			18.71
	Vested and Settled in Shares		(49,409	)		(23.42	)
	Vested and Surrendered for Withholding Taxes Payable		(27,127	)		(21.75	)
	Canceled / Expired		(1,278	)		(35.14	)

	Outstanding at December 31, 2013		193,632		$	20.97		$	3,407,929

Future_Minimum_Lease_Receipts_

Future Minimum Lease Receipts (Tables)	12 Months Ended
Future Minimum Lease Receipts (Tables)	Dec. 31, 2013
Leases [Abstract]	'
Schedule of Minimum Future Rentals on Noncancelable Operating Leases	'
	The following is a schedule by years of minimum future rentals on non-cancelable operating leases as of December 31, 2013 (in thousands):


	For the Calendar Years Ending December 31,
	2014	$	41,900
	2015		90,951
	2016		94,378
	2017		91,629
	2018		84,573

		$	403,431

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	12 Months Ended
Employee Benefit Plans (Tables)	Dec. 31, 2013
Postemployment Benefits [Abstract]	'
Summary of Changes in Projected Benefit Obligation	'
	The following tables summarize the projected benefit obligation, the assets and the funded status of the Pension Plans and the Postretirement Plan at December 31, 2013 and 2012:


		As of December 31, 2013						As of December 31, 2012
		Pension			Postretirement			Pension			Postretirement
		(in thousands)
	Projected benefit obligation
	Benefit obligation at beginning of year	$	4,841		$	1,136		$	5,213		$	863
	Service cost		137			43			29			4
	Interest cost		194			43			31			5
	Amendment		—			—			—			332
	Actuarial (gain) loss		(528	)		(233	)		(412	)		(54	)
	Actual benefit paid		(139	)		(136	)		(20	)		(14	)

	Benefit obligation at end of year		4,505			853			4,841			1,136

	Fair value of plan assets
	Fair value of plan assets at beginning of year		4,333			—			4,279			—
	Actual return on plan assets		624			—			74			—
	Employer contributions		109			136			—			14
	Actual benefit paid		(139	)		(136	)		(20	)		(14	)

	Fair value of plan assets at end of year		4,927			—			4,333			—

	Funded status at end of year		422			(853	)	$	(508	)	$	(1,136	)

	Amounts recognized in the consolidated balance sheet
	Noncurrent assets	$	422		$	—		$	—		$	—
	Current liabilities		—			(86	)		—			(95	)
	Noncurrent liabilities		—			(767	)		(508	)		(1,041	)

		$	422			(853	)	$	(508	)	$	(1,136	)

Summary of Net Periodic Benefit Cost and Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income	'
	The components of net periodic benefit cost and other changes in plan assets and benefit obligations recognized in other comprehensive income are as follows for the calendar year ended December 31, 2013 and for the two-month period ended December 31, 2012:



		For the Calendar Year						For the Two-Month Period
		Ended December						Ended December
		31, 2013						31, 2012
		Pension			Postretirement			Pension			Postretirement
		(in thousands)
	Net periodic benefit cost
	Service cost	$	137		$	43		$	29		$	4
	Interest cost		194			43			31			5
	Expected return on plan assets		(260	)		—			(42	)		—
	Amortization of prior service cost		—			22			—			—
	Amortization of net gain		(5	)		—			—			—

	Net periodic pension costs	$	66		$	108		$	18		$	9

	Other changes in plan assets and benefit obligations recognized in other comprehensive income
	Net actuarial gain	$	(893	)	$	(233	)	$	(444	)	$	(54	)
	Recognized actuarial gain		5			—			—			—
	Prior service cost		—			—			—			332
	Recognized prior service cost		—			(22	)		—			—

	Total recognized in other comprehensive (income) loss	$	(888	)	$	(255	)	$	(444	)	$	278


Summary of Accumulated Other Comprehensive Income (Loss) Not Yet Recognized in Net Periodic Cost	'
	Accumulated other comprehensive income (loss) at December 31, 2013 and 2012 consists of the following amounts that have not yet been recognized in net periodic benefit cost:


		As of December 31, 2013						As of December 31, 2012
		Pension			Postretirement			Pension			Postretirement
		(in thousands)
	Net (gain) loss	$	(1,332	)	$	(287	)	$	(444	)	$	(54	)
	Prior service costs		—			310			—			332

		$	(1,332	)	$	23		$	(444	)	$	278
Weighted Average Assumptions Used to Determine Benefit Obligations	'
	Weighted average assumptions used to determine benefit obligations:


		As of December 31, 2013						As of December 31, 2012
		Pension			Postretirement			Pension			Postretirement
	Discount rate		4.8	%		4.7	%		4.1	%		4	%
Weighted Average Assumptions Used to Determine Net Pension Cost	'
	Weighted average assumptions used to determine net pension cost:


		For the Year Ended						For the Year Ended
		December 31, 2013						December 31, 2012
		Pension			Postretirement			Pension			Postretirement
	Discount rate		4.1	%		4	%		3.6	%		3.6	%
	Expected rate of return on assets		6	%		N/A			6	%		N/A


		Postretirement
		As of December 31,
		2013			2012
	Health care cost trend: initial		7.25	%		7.5	%
	Health care cost trend: ultimate		5	%		5	%
	Year ultimate reached		2023			2023
Schedule of Allocation of Plan Assets	'
	As the Postretirement Plan provides a fixed dollar amount to participants, increasing or decreasing the health care cost trend rate by 1% would not have a material impact on the December 31, 2013 and 2012 obligation.


		As of December 31, 2013						As of December 31, 2012
		Target			Percentage of			Target			Percentage of
		Allocation			Pension Plan			Allocation			Pension Plan
					Assets 2013						Assets 2012
	Asset Category
	Equity securities		50	%		52	%		50	%		51	%
	Debt securities		50	%		48	%		50	%		49	%
Summary of Pension Plan Assets Measured at Fair Value	'
	The pension plan assets, which are deemed to be Level 1, measured at fair value consist of the following at December 31, 2013 and 2012 (in thousands):


		As of December 31,
		2013			2012
	Mutual funds — equity	$	2,560		$	2,193
	Mutual funds — fixed income		2,356			2,134
	Cash		11			6

	Fair value of plan assets	$	4,927		$	4,333

Schedule of Expected Future Benefit Payments	'
	Expected Future Benefit Payments:


		Pension			Postretirement
		(in thousands)
	2014	$	193		$	88
	2015		206			79
	2016		211			58
	2017		223			68
	2018		228			63
	2019-2023		1,259			226

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
Income Taxes (Tables)	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Provision (Benefit) for Income Taxes	'

	The provision (benefit) for income taxes for the calendar years ended December 31, 2013 and 2012, the three months ended December 31, 2011 and the fiscal year ended September 30, 2011 was as follows:



		For the Calendar Years						For the Three Months			For the Fiscal
		Ended December 31,						Ended December 31,			Year Ended
											September 30,
		2013			2012			2011			2011
		(in thousands)
	Current:
	Federal	$	66		$	104		$	—		$	—
	State		359			1,260			2			3
	Foreign		114			—			—			—

	Total Current		539			1,364			2			3

	Deferred:
	Federal	$	(22,038	)	$	—		$	—		$	—
	State		(5,092	)		—			—			—
	Foreign		—			—			—			—

	Total Deferred		(27,130	)		—			—			—

		$	(26,591	)	$	1,364		$	2		$	3

Income Taxes at the Federal Statutory Rate	'
	A reconciliation of the income taxes at the federal statutory rate to the effective tax rate was as follows:


		For the Calendar Years						For the Three Months			For the Fiscal
		Ended December 31,						Ended December 31,			Year Ended
											September 30,
		2013			2012			2011			2011
		(in thousands)
	Federal income tax benefit calculated at the federal statutory rate	$	(9,009	)	$	9,979		$	(2,730	)	$	(21,885	)
	Impact of foreign earnings		669			—			—			—
	State income tax benefit net of federal benefit		(1,133	)		(830	)		3,882			(3,069	)
	Permanent differences, other		330			375			136			434
	Return to provision		467			—			—			—
	Change in state tax rate		—			1,020			—			(2,164	)
	Minority interest, net of state tax benefit		(624	)		(13,153	)		—			—
	Partnership state taxes		(96	)		303			—			—
	Research and development (“R&D”) credit		(6,191	)		—			—			—
	Basis difference in foreign subsidiaries		374			—			—			—
	Partnership basis difference		(1,022	)		(3,439	)		93,527			—
	Change in valuation allowance		(10,424	)		7,109			(94,813	)		26,687
	Other items		68			—			—			—

	Income tax expense
	From continuing operations	$	(26,591	)	$	1,364		$	2		$	3


Components of the Net Deferred Tax Liability and Net Deferred Tax Asset	'
	The components of the net deferred tax liability and net deferred tax asset as of December 31, 2013 and 2012 are as follows:


		As of December 31,
		2013			2012
		(in thousands)
	Current:
	Accruals for financial statement purposes not allowed for income taxes	$	2,626		$	2,511
	Basis difference in prepaid expenses		(344	)		(366	)
	Inventory		—			84
	Unrealized gain		(12	)		—
	Valuation allowance		(1,130	)		(1,463	)

	Current, net		1,140			766
	Long-Term:
	Net operating loss and AMT credit carryforwards	$	55,066		$	42,810
	R&D credit carryforward		6,191			—
	Basis difference relating to intangibles		(11,336	)		722
	Basis difference in property, plant and equipment		(11,421	)		15,770
	Stock option exercises		3,344			6,309
	Basis difference in foreign subsidiaries		(6,142	)		—
	Basis difference in partnership interest		(19,051	)		(29,375	)
	Other items		1,652			663
	Valuation allowance		(27,574	)		(37,665	)

	Long-Term, net	$	(9,271	)	$	(766	)

	Total deferred tax liabilities, net	$	(8,131	)	$	—


Available Carryforwards to Offset Future Taxable Income	'
	As of December 31, 2013, the Company had the following available carryforwards and tax attributes to offset future taxable income:


	Description	Amount			Expiration
		(in thousands)
	Net Operating Losses – Federal	$	136,057		2020 - 2033
	Net Operating Losses – States (Post-Apportionment and Pre-tax)
	Alabama	$	749		2014 - 2029
	California		12,845		2015 - 2031
	Colorado		3,363		2027 - 2034
	Georgia		567		2021 - 2029
	Hawaii		6,101		2024 - 2034
	Illinois		93,836		2019 - 2026
	Louisiana		66		2020 - 2029
	Mississippi		11,765		2019 - 2034
	Virginia		161		2034

		$	129,453

	R&D federal credit	$	6,981		2016 - 2022
	Alternative minimum tax credit	$	1,471		No Expiration
Unrecognized Tax Benefits	'

	A reconciliation of the beginning and ending amounts of unrecognized tax benefits is as follows:



		As of December 31,
		2013			2012			2011
		(in thousands)
	Reconciliation of Unrecognized Tax Liability
	Balance at beginning of year	$	2,754		$	2,754		$	2,754
	Additions based on tax positions taken during a prior period		3,479			—			—
	Additions based on tax positions related to the current period		—			—			—
	Reductions based on tax positions related to prior years		(1,965	)		—			—
	Settlements with taxing authorities		—			—			—
	Lapse of statutes of limitations		—			—			—

	Balance at end of year	$	4,268		$	2,754		$	2,754

Segment_Information_Tables

Segment Information (Tables)	12 Months Ended
Segment Information (Tables)	Dec. 31, 2013
Segment Reporting [Abstract]	'
Segment Information	'
	The Company’s reportable operating segments have been determined in accordance with the Company’s internal management structure, which is organized based on operating activities. The Company evaluates performance based upon several factors, of which the primary financial measure is segment-operating income.


			For the Calendar Years								For the Three Months							For the Fiscal
			Ended December 31,								Ended December 31,							Year Ended
																		September 30,
			2013				2012				2011				2010			2011
			(in thousands)
															(unaudited)
	Revenues
	East Dubuque		$	177,700			$	224,205			$	63,014			$	42,962		$	179,857
	Pasadena			133,675				37,430				—				—			—
	Fulghum Fibres			62,974				—				—				—			—
	Energy technologies			506				290				52				52			206

	Total revenues		$	374,855			$	261,925			$	63,066			$	43,014		$	180,063

	Gross profit (loss)
	East Dubuque		$	80,883			$	133,543			$	25,554			$	16,127		$	76,571
	Pasadena			(9,529	)			(1,704	)			—				—			—
	Fulghum Fibres			12,032				—				—				—			—
	Energy technologies			305				80				2				1			6

	Total gross profit		$	83,691			$	131,919			$	25,556			$	16,128		$	76,577

	Selling, general and administrative expense
	East Dubuque		$	4,576			$	6,242			$	3,336			$	1,431		$	5,786
	Pasadena			4,764				361				—				—			—
	Fulghum Fibres			3,754				—				—				—			—
	Wood pellets			5,479				1,919				—				—			—
	Energy technologies			7,709				4,514				7,162				6,256			22,218

	Total selling, general and administrative expense		$	26,282			$	13,036			$	10,498			$	7,687		$	28,004

	Research and development
	Energy technologies		$	5,747			$	20,944			$	4,202			$	5,426		$	30,009

	Total research and development		$	5,747			$	20,944			$	4,202			$	5,426		$	30,009

	Depreciation and amortization
	East Dubuque		$	191			$	807			$	77			$	112		$	409
	Pasadena			3,886				583				—				—			—
	Fulghum Fibres1			(1,708	)			—				—				—			—
	Wood pellets			26				—				—				—			—
	Energy technologies			122				1,573				489				461			1,816

	Total depreciation and amortization recorded in operating expenses		$	2,517			$	2,963			$	566			$	573		$	2,225

	East Dubuque			9,048				10,690				3,210				2,489			9,611
	Pasadena			4,187				380				—				—			—
	Fulghum Fibres			4,836				—				—				—			—

	Total depreciation and amortization expense recorded in cost of sales			18,071				11,070				3,210				2,489			9,611

	Total depreciation and amortization		$	20,588			$	14,033			$	3,776			$	3,062		$	11,836

	Other operating (income) expenses
	East Dubuque		$	806			$	510			$	(507	)		$	—		$	522
	Pasadena			30,029				—				—				—			—
	Fulghum Fibres			72				—				—				—			—
	Wood pellets			—				—				—				—			—
	Energy technologies			(6,272	)			15,126				583				53			50,851

Total other operating expenses		$	24,635			$	15,636			$	76			$	53		$	51,373

Operating income (loss)
East Dubuque		$	75,310			$	125,984			$	22,648			$	14,584		$	69,854
Pasadena			(48,208	)			(2,648	)			—				—			—
Fulghum Fibres			9,914				—				—				—			—
Wood pellets			(5,505	)			(1,919	)			—				—			—
Energy technologies			(7,001	)			(42,077	)			(12,434	)			(12,195	)		(104,888	)

Total operating income (loss)		$	24,510			$	79,340			$	10,214			$	2,389		$	(35,034	)

Interest (income) expense
East Dubuque		$	—			$	194			$	1,947			$	2,912		$	13,752
Pasadena			8				—				—				—			—
Fulghum Fibres			1,755				—				—				—			—
Energy technologies			(3	)			(1,576	)			2,151				818			2,914

Total interest (income) expense		$	1,760			$	(1,382	)		$	4,098			$	3,730		$	16,666

Net income (loss)
East Dubuque		$	75,244			$	123,721			$	10,455			$	7,096		$	42,341
Pasadena			(48,357	)			(2,648	)			—				—			—
Fulghum Fibres			6,967				—				—				—			—
Wood pellets			(5,180	)			(1,919	)			—				—			—
Energy technologies			(6,891	)			(40,498	)			(14,553	)			(12,980	)		(107,723	)

Total segment net income (loss)		$	21,783			$	78,656			$	(4,098	)		$	(5,884	)	$	(65,382	)

Reconciliation of segment net income (loss) to consolidated net income (loss):
Segment net income (loss)		$	21,783			$	78,656			$	(4,098	)		$	(5,884	)	$	(65,382	)
RNP – partnership and unallocated expenses recorded as selling, general and administrative expenses			(7,945	)			(11,773	)			—				—			—
RNP – partnership and unallocated expenses recorded as other income (expense)			(1,081	)			232				—				—			—
RNP – unallocated interest expense and loss on interest rate swaps			(14,096	)			(2,226	)			—				—			—
RNP – income tax benefit (expense)			303				(303	)			—				—			—
Corporate and unallocated expenses recorded as selling, general and administrative expenses			(24,849	)			(23,432	)			—				—			—
Corporate and unallocated depreciation and amortization expense			(596	)			(791	)			—				—			—
Corporate and unallocated income (expenses) recorded as other income (expense)			19				(2,708	)			—				—			—
Corporate and unallocated interest expense			(532	)			(9,055	)			—				—			—
Corporate income tax benefit (expense)			27,032				(1,063	)			—				—			—
Income from discontinued operations			—				150				—				—			—

Consolidated net income (loss)		$	38			$	27,687			$	(4,098	)		$	(5,884	)	$	(65,382	)


1	Amortization of unfavorable processing agreements exceeds amortization of favorable processing agreements resulting in a credit in depreciation and amortization for Fulghum.


		As of December 31,
		2013				2012
		(in thousands)
Total assets
East Dubuque		$	175,430			$	125,100
Pasadena			188,836				191,279
Fulghum Fibres			188,397				—
Wood pellets			42,089				58
Energy technologies			6,135				10,197

Total segment assets		$	600,887			$	326,634

Reconciliation of segment total assets to consolidated total assets:
Segment total assets		$	600,887			$	326,634
RNP – partnership and other			42,078				60,266
Corporate and other			60,625				92,302

Consolidated total assets		$	703,590			$	479,202



Summary of Revenue by Geographic Area	'
	The Company’s revenue by geographic area, based on where the customer takes title to the product, was as follows:


			For Calendar Years
			Ended December 31,
			2013				2012
			(in thousands)
	United States		$	352,514			$	261,925
	Other			22,341				—

	Total revenues		$	374,855			$	261,925

Summary of Assets by Geographic Area	'
	The following table sets forth assets by geographic area:


			As of
			December 31,				December 31,
			2013				2012
			(in thousands)
	United States		$	633,886			$	479,202
	Other			69,704				—

	Total assets		$	703,590			$	479,202

Selected_Quarterly_Financial_D1

Selected Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
Selected Quarterly Financial Data (Unaudited) (Tables)	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]	'
Selected Unaudited Condensed Consolidated Financial Information	'

	Selected unaudited condensed consolidated financial information for the calendar years ended December 31, 2013 and 2012 is presented in the tables below (in thousands, except per share data).



		First			Second			Third			Fourth
		Quarter			Quarter			Quarter			Quarter
	For the 2013 Calendar Year
	Revenues	$	59,667		$	120,153		$	115,762		$	79,273
	Gross profit (loss)	$	22,772		$	42,314		$	21,199		$	(2,594	)
	Operating income (loss)	$	2,068		$	25,074		$	(20,216	)	$	(15,806	)
	Income (loss) from continuing operations	$	786		$	44,306		$	(23,578	)	$	(21,476	)
	Net income (loss)	$	786		$	44,306		$	(23,578	)	$	(21,476	)
	Net (income) loss attributable to noncontrolling interests	$	(6,026	)	$	(11,474	)	$	8,985		$	6,945
	Net income (loss) attributable to Rentech	$	(5,240	)	$	32,832		$	(14,593	)	$	(14,531	)
	Net income (loss) per common share allocated to Rentech:
	Basic and diluted:
	Continuing operations	$	(0.02	)	$	0.14		$	(0.06	)	$	(0.06	)
	Discontinued operations	$	0		$	0		$	0		$	0

	Net income (loss)	$	(0.02	)	$	0.14		$	(0.06	)	$	(0.06	)


		First			Second			Third			Fourth
		Quarter			Quarter			Quarter			Quarter
	For the 2012 Calendar Year
	Revenues	$	38,588		$	70,707		$	60,170		$	92,460
	Gross profit	$	22,635		$	45,655		$	35,040		$	28,589
	Operating income (loss)	$	6,578		$	29,448		$	16,604		$	(9,286	)
	Income (loss) from continuing operations	$	4,326		$	25,679		$	15,443		$	(17,911	)
	Income from discontinued operations, net of tax	$	—		$	—		$	134		$	16
	Net income (loss)	$	4,326		$	25,679		$	15,577		$	(17,895	)
	Net (income) attributable to noncontrolling interests	$	(7,590	)	$	(16,159	)	$	(11,307	)	$	(6,631	)
	Net income (loss) attributable to Rentech	$	(3,264	)	$	9,520		$	4,270		$	(24,526	)
	Net income (loss) per common share allocated to Rentech:
	Basic and diluted:
	Continuing operations	$	(0.01	)	$	0.04		$	0.02		$	(0.11	)
	Discontinued operations	$	0		$	0		$	0		$	0

	Net income (loss)	$	(0.01	)	$	0.04		$	0.02		$	(0.11	)

Description_of_Business_Additi

Description of Business - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended	12 Months Ended			12 Months Ended			12 Months Ended		12 Months Ended
	Oct. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Apr. 30, 2013	Dec. 31, 2013	Apr. 30, 2013	Dec. 31, 2013
			Segment		Graanul Invest [Member]	United States [Member]	Chile [Member]	Chile [Member]	Uruguay [Member]	Uruguay [Member]	IPO [Member]
			Store			Store	Store		Store
			Location
			Facility
Subsidiary, Sale of Stock [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Number of operating segments	'	'	5	'	'	'	'	'	'	'	'
Number of operates fertilizer facilities	'	'	2	'	'	'	'	'	'	'	'
Initial public offering, Common stock	'	'	'	'	'	'	'	'	'	'	15,000,000
Price per share	'	'	'	'	'	'	'	'	'	'	$20
Public offering portion of common units ownership percentage	'	'	'	'	'	'	'	'	'	'	39.20%
Percentage after offering	'	'	'	'	'	'	'	'	'	'	60.80%
Equity interest in joint venture	'	'	'	'	50.00%	'	'	'	'	'	100.00%
Proceeds received net of cost	'	$276,007,000	'	($245,000)	'	'	'	'	'	'	$275,100,000
Additional paid-in capital	'	'	541,254,000	539,448,000	'	'	'	'	'	'	240,700,000
Noncontrolling interest	'	'	'	'	'	'	'	'	'	'	34,400,000
Percentage of net book value	'	'	'	'	'	'	'	'	'	'	39.20%
Membership interests acquired in Agrifos percentage	100.00%	'	'	'	'	'	88.00%	'	87.00%	'	'
Number of stores	'	'	32	'	'	26	5	'	1	'	'
Ownership interest in the subsidiary	'	'	'	'	'	'	88.00%	'	87.00%	'	'
Noncontrolling interests	'	'	'	'	'	'	'	4,000,000	'	4,000,000	'
Additional Ownership interest in subsidiary	'	'	'	'	'	'	13.00%	'	'	'	'
Number of facilities	'	'	2	'	'	'	'	'	'	'	'
Equity in loss of investee	'	'	-242,000	'	'	'	'	'	'	'	'
Increased revenue	'	'	$200,000	'	'	'	'	'	'	'	'

Summary_of_Certain_Significant3

Summary of Certain Significant Accounting Policies - Additional Information (Detail) (USD $)

12 Months Ended

0 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

2 Months Ended

12 Months Ended

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2012

Aug. 15, 2013

Dec. 31, 2011

Dec. 31, 2012

Sep. 30, 2011

Dec. 31, 2013

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Sep. 30, 2011

Dec. 31, 2013

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Sep. 30, 2011

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Mississippi [Member]

Patents [Member]

Unfavorable Processing Agreements [Member]

East Dubuque [Member]

Pasadena [Member]

Sales Revenue, Segment [Member]

Accounts Receivable [Member]

Maximum [Member]

Ammonium Sulfate [Member]

East Dubuque [Member]

Pasadena [Member]

East Dubuque [Member]

Ammonium Sulfate [Member]

Significant Accounting Policies [Line Items]

Natural gas sales

$3,400,000

$1,100,000

$100,000

Concentration risk percentage

92.00%

79.00%

83.00%

84.00%

73.00%

Maximum payment of commissions

5,000,000

Period of distribution agreement

'10 years

Commission rate

2.00%

Increase in commission rate on each year

1.00%

Current maximum commission rate

5.00%

Effective commission rate associated with sales under the Distribution Agreement

2.60%

3.60%

2.70%

4.30%

Successive agreement period

'1 year

Termination notice period

'210 days

Agreement to market and sell

59,500

Revenues from sale

100.00%

Deferred revenue

21,643,000

29,699,000

Past due balance period

'90 days

Insurance receivable

1,700,000

Depreciation of inventories

1,200,000

1,000,000

Assets retirement obligation liability

3,000,000

3,100,000

Product demonstration unit classified as held for sale

8,600,000

Property held for sale

6,300,000

Future amortization expense, year one

4,300,000

Future amortization expense, year two

4,400,000

Future amortization expense, year three

4,400,000

Future amortization expense, year four

4,400,000

Future amortization expense, year five

4,400,000

Unfavorable Processing Agreements

4,100,000

Cost for patents

11,900,000

Accumulated amortization

5,110,000

583,000

2,000,000

Amortization expense

$300,000

$1,400,000

$1,000,000

Summary_of_Certain_Significant4

Summary of Certain Significant Accounting Policies - Property, Plant and Equipment Stated at Cost Less Accumulated Depreciation (Detail)	12 Months Ended
	Dec. 31, 2013
Leasehold Improvements [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Life	'Useful life or remaining lease term whichever is shorter
Platinum Catalyst [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Life	'Based on units of production
Building and Building Improvements [Member] \| Minimum [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Life	'4 years
Building and Building Improvements [Member] \| Maximum [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Life	'40 years
Land Improvements [Member] \| Minimum [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Life	'5 years
Land Improvements [Member] \| Maximum [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Life	'20 years
Machinery and Equipment [Member] \| Minimum [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Life	'7 years
Machinery and Equipment [Member] \| Maximum [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Life	'22 years
Furniture, Fixtures and Office Equipment [Member] \| Minimum [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Life	'3 years
Furniture, Fixtures and Office Equipment [Member] \| Maximum [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Life	'10 years
Computer Equipment and Software [Member] \| Minimum [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Life	'2 years
Computer Equipment and Software [Member] \| Maximum [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Life	'5 years
Vehicles [Member] \| Minimum [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Life	'2 years
Vehicles [Member] \| Maximum [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Life	'15 years
Ammonia Catalyst [Member] \| Minimum [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Life	'3 years
Ammonia Catalyst [Member] \| Maximum [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Life	'10 years

Summary_of_Certain_Significant5

Summary of Certain Significant Accounting Policies - Summery of Intangible Assets (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Schedule Of Intangible Assets [Line Items]	'	'
Intangibles, gross	$64,840	$26,768
Less: accumulated amortization	-5,110	-583
Intangibles, net	59,730	26,185
Trade Names [Member]	'	'
Schedule Of Intangible Assets [Line Items]	'	'
Intangibles, gross	5,496	'
Wood Chip Processing Agreements [Member]	'	'
Schedule Of Intangible Assets [Line Items]	'	'
Intangibles, gross	29,765	'
Wood Chip Processing Agreements [Member] \| Minimum [Member]	'	'
Schedule Of Intangible Assets [Line Items]	'	'
Intangible assets, Average life	'1 year	'
Wood Chip Processing Agreements [Member] \| Maximum [Member]	'	'
Schedule Of Intangible Assets [Line Items]	'	'
Intangible assets, Average life	'17 years	'
Off-Take Contract [Member]	'	'
Schedule Of Intangible Assets [Line Items]	'	'
Intangible assets, Average life	'10 years	'
Intangibles, gross	2,811	'
Technology to Produce Fertilizers [Member]	'	'
Schedule Of Intangible Assets [Line Items]	'	'
Intangible assets, Average life	'20 years	'
Intangibles, gross	23,680	23,680
Fertilizer Marketing Agreements [Member]	'	'
Schedule Of Intangible Assets [Line Items]	'	'
Intangible assets, Average life	'1 year 6 months	'
Intangibles, gross	$3,088	$3,088

Fulghum_Acquisition_Additional

Fulghum Acquisition - Additional Information (Detail) (USD $)

3 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Sep. 30, 2011

2-May-13

Dec. 31, 2013

Fulghum [Member]

Business Acquisition [Line Items]

Fulghum cash at closing

$64,200,000

Debt repaid

3,300,000

Additional deferred tax liabilities

15,800,000

Revenue

79,273,000

115,762,000

120,153,000

59,667,000

92,460,000

60,170,000

70,707,000

38,588,000

63,066,000

43,014,000

374,855,000

261,925,000

200,115,000

180,063,000

63,000,000

Net loss

-21,476,000

-23,578,000

44,306,000

786,000

-17,895,000

15,577,000

25,679,000

4,326,000

-4,098,000

-5,884,000

38,000

27,687,000

-63,596,000

-65,382,000

7,000,000

Business Combination, acquisition related costs

$4,100,000

$1,500,000

Fulghum_Acquisition_Preliminar

Fulghum Acquisition - Preliminary Purchase Price Allocation (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Oct. 31, 2012	Dec. 31, 2011	2-May-13	Apr. 30, 2013
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Oct. 31, 2012	Dec. 31, 2011	Fulghum [Member]	Fulghum [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'
Cash	'	'	$2,622	'	'	$10,137
Accounts receivable	'	'	3,204	'	'	3,936
Inventories	'	'	30,373	'	'	2,389
Prepaid expenses and other current assets	'	'	566	'	'	952
Other receivables, net	'	'	'	'	'	5,435
Property, plant and equipment	'	'	68,688	'	'	94,382
Intangible assets	'	'	26,768	'	'	35,261
Goodwill	57,134	56,592	57,231	7,209	'	29,932
Other assets	'	'	73	'	'	2,974
Accounts payable	'	'	-10,638	'	'	-6,547
Accrued liabilities	'	'	-6,640	'	'	-5,823
Customer deposits	'	'	-13,301	'	'	-1,059
Asset retirement obligation	'	'	-2,776	'	'	-178
Credit facility and loans	'	'	'	'	'	-61,865
Unfavorable processing agreements	'	'	'	'	'	-6,496
Deferred income taxes	'	'	'	'	-35,300	-35,262
Noncontrolling interests	'	'	'	'	'	-4,000
Total preliminary purchase price	'	'	$161,228	'	'	$64,168

Fulghum_Acquisition_Preliminar1

Fulghum Acquisition - Preliminary Purchase Price Allocation (Parenthetical) (Detail) (USD $)	Oct. 31, 2012	Apr. 30, 2013	Apr. 30, 2013	Apr. 30, 2013
In Thousands, unless otherwise specified		Fulghum [Member]	Fulghum [Member]	Fulghum [Member]
			Trade Names [Member]	Wood Chip Processing Agreements [Member]
Business Acquisition [Line Items]	'	'	'	'
Intangible assets	$26,768	$35,261	$5,496	$29,765

Agrifos_Acquisition_Additional

Agrifos Acquisition - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended		12 Months Ended
	Oct. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2011
Business Acquisition [Line Items]	'	'	'	'	'	'
Cash	'	'	'	$65,823,000	$128,596,000	'
Company's ownership interest	100.00%	'	'	'	'	'
Additional contingent consideration	50,000,000	'	'	'	'	'
Number of years of adjusted EBITDA to calculate earn out consideration	'2 years	'	'	'	'	'
Escrow agent, initial consideration in cash	7,250,000	'	'	'	'	'
Escrow agent common units, shares	323,276	'	'	'	'	'
Escrow agent common units valued	12,000,000	'	'	'	'	'
Earn-out consideration arrangements description	'Based on the amount by which the two-year Adjusted EBITDA, as defined in the Purchase Agreement, of the Pasadena Facility exceeds certain thresholds	'	'	'	'	'
Increase in accrued liabilities due to fair value adjustment	'	-4,698,000	-2,313,000	-9,402,000	-23,392,000	7,408,000
Revenue from Agrifos	'	'	'	'	37,400,000	'
Net loss from operations of Agrifos	'	'	'	'	2,600,000	'
Acquisition related costs	'	'	'	'	4,100,000	'
Pasadena Facility [Member]	'	'	'	'	'	'
Business Acquisition [Line Items]	'	'	'	'	'	'
Number of years of indemnification obligation	'6 years	'	'	'	'	'
Agrifos [Member]	'	'	'	'	'	'
Business Acquisition [Line Items]	'	'	'	'	'	'
Cash	136,300,000	'	'	'	'	'
Common units valued	20,000,000	'	'	'	'	'
Company's ownership interest in RNP	60.80%	'	'	'	'	'
Company's ownership interest	59.90%	'	'	'	'	'
Increase in preliminary purchase price due to working capital adjustment	'	'	'	300,000	'	'
Increase in cash due to working capital adjustment	'	'	'	2,200,000	'	'
Decrease in other receivables due to working capital adjustment	'	'	'	2,500,000	'	'
Increase in goodwill due to fair value adjustment	'	'	'	600,000	'	'
Increase in accrued liabilities due to fair value adjustment	'	'	'	$300,000	'	'

Agrifos_Acquisition_Purchase_P

Agrifos Acquisition - Purchase Price (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013
Business Combinations [Abstract]	'
Cash (through borrowings under a previous credit agreement) less working capital adjustments	$136,308
Fair market value of 538,793 Common Units issued	20,000
Estimate of potential earn-out consideration	4,920
Total purchase price	$161,228

Agrifos_Acquisition_Purchase_P1

Agrifos Acquisition - Purchase Price (Parenthetical) (Detail) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013
Business Combinations [Abstract]	'
Common Units	538,793
Fair value of the potential earn-out consideration	$0

Agrifos_Acquisition_Final_Purc

Agrifos Acquisition - Final Purchase Price Allocation (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Oct. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Oct. 31, 2012	Dec. 31, 2011
Business Combinations [Abstract]	'	'	'	'
Cash	'	'	$2,622	'
Accounts receivable	'	'	3,204	'
Inventories	'	'	30,373	'
Prepaid expenses and other current assets	'	'	566	'
Property, plant and equipment	'	'	68,688	'
Construction in progress	60,136	61,417	7,011	'
Intangible assets	'	'	26,768	'
Goodwill	57,134	56,592	57,231	7,209
Other assets	'	'	73	'
Accounts payable	'	'	-10,638	'
Accrued liabilities	'	'	-6,640	'
Customer deposits	'	'	-13,301	'
Asset retirement obligation	'	'	-2,776	'
Other long-term liabilities	'	'	-1,953	'
Total preliminary purchase price	'	'	$161,228	'

Agrifos_Acquisition_Final_Purc1

Agrifos Acquisition - Final Purchase Price Allocation (Parenthetical) (Detail) (USD $)	Oct. 31, 2012
In Thousands, unless otherwise specified	Oct. 31, 2012
Business Acquisition [Line Items]	'
Intangible assets	$26,768
Technology to Produce Fertilizers [Member]	'
Business Acquisition [Line Items]	'
Intangible assets	23,680
Marketing-Related Intangible Assets [Member]	'
Business Acquisition [Line Items]	'
Intangible assets	$3,088

Pro_forma_Information_Pro_form

Pro forma Information - Pro forma Information (Detail) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
As Reported [Member]	'	'
Business Acquisition, Pro Forma Information [Abstract]	'	'
Revenues	$374,855	$261,925
Net income (loss)	38	27,687
Net income (loss) attributable to Rentech	-1,532	-14,000
Basic net income (loss) per common share attributable to Rentech	($0.01)	($0.06)
Diluted net income (loss) per common share attributable to Rentech	($0.01)	($0.06)
Pro Forma Adjustments [Member]	'	'
Business Acquisition, Pro Forma Information [Abstract]	'	'
Revenues	36,683	226,346
Net income (loss)	-27,332	29,137
Net income (loss) attributable to Rentech	-27,467	29,573
Basic net income (loss) per common share attributable to Rentech	($0.12)	$0.13
Diluted net income (loss) per common share attributable to Rentech	($0.12)	$0.13
Pro Forma [Member]	'	'
Business Acquisition, Pro Forma Information [Abstract]	'	'
Revenues	411,538	488,271
Net income (loss)	-27,294	56,824
Net income (loss) attributable to Rentech	($28,999)	$15,573
Basic net income (loss) per common share attributable to Rentech	($0.13)	$0.07
Diluted net income (loss) per common share attributable to Rentech	($0.13)	$0.07

Fair_Value_Fair_Value_Disclosu

Fair Value - Fair Value Disclosure (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Liabilities	'	'
RNP Notes	$320,000,000	'
Credit facilities and term loan, Carrying Value	'	193,290,000
RNHI Revolving Loan	50,000,000	'
QS Construction Facility, Carrying Value	4,527,000	'
Earn-out consideration, Carrying Value	1,544,000	4,920,000
Earn-out consideration, Fair value	0	'
Interest Rate Swap [Member]	'	'
Liabilities	'	'
Interest rate swaps	'	929,000
Fulghum [Member]	'	'
Liabilities	'	'
Fulghum debt, Carrying Value	47,452,000	'
Level 1 [Member]	'	'
Liabilities	'	'
RNP Notes	318,400,000	'
Credit facilities and term loan, Fair Value	'	'
Interest rate swaps	'	'
RNHI Revolving Loan	'	'
QS Construction Facility, Fair value	'	'
Earn-out consideration, Fair value	'	'
Level 1 [Member] \| Fulghum [Member]	'	'
Liabilities	'	'
Fulghum debt	'	'
Level 2 [Member]	'	'
Liabilities	'	'
RNP Notes	'	'
Credit facilities and term loan, Fair Value	'	193,290,000
Interest rate swaps	'	929,000
RNHI Revolving Loan	50,000,000	'
QS Construction Facility, Fair value	4,527,000	'
Earn-out consideration, Fair value	'	'
Level 2 [Member] \| Fulghum [Member]	'	'
Liabilities	'	'
Fulghum debt	45,970,000	'
Level 3 [Member]	'	'
Liabilities	'	'
RNP Notes	'	'
Credit facilities and term loan, Fair Value	'	'
Interest rate swaps	'	'
RNHI Revolving Loan	'	'
QS Construction Facility, Fair value	'	'
Earn-out consideration, Fair value	1,544,000	4,920,000
Level 3 [Member] \| Fulghum [Member]	'	'
Liabilities	'	'
Fulghum debt	'	'

Fair_Value_Additional_Informat

Fair Value - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
	Dec. 31, 2013	Swap
Fair Value Of Financial Instruments [Line Items]	'	'
Number of forward interest rate swaps entered	'	2
Number of years to determine fair value of earn out consideration	'2 years	'
Decrease in fair value of earn out liability	$4,900,000	'
Earn-out consideration, Fair value	0	'
Earn-out consideration, Carrying Value	1,544,000	4,920,000
Agrifos [Member]	'	'
Fair Value Of Financial Instruments [Line Items]	'	'
Earn-out consideration, Fair value	0	'
Atikokan Project [Member]	'	'
Fair Value Of Financial Instruments [Line Items]	'	'
Number of years to determine fair value of earn out consideration	'10 years	'
Earn-out consideration, Carrying Value	1,500,000	'
Loan provided to sellers	900,000	'
Interest Rate Swap [Member]	'	'
Fair Value Of Financial Instruments [Line Items]	'	'
Payment to terminate the interest rate swaps	$900,000	'

Fair_Value_Net_Loss_on_Interes

Fair Value - Net Loss on Interest Rate Swaps (Detail) (Not Designated as Hedging Instrument [Member], Interest Rate Swap [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Not Designated as Hedging Instrument [Member] \| Interest Rate Swap [Member]	'	'
Derivative [Line Items]	'	'
Realized loss	($24)	($22)
Unrealized gain (loss)	17	-929
Total net loss on interest rate swaps	($7)	($951)

Inventories_Inventories_Detail

Inventories - Inventories (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Inventory Disclosure [Abstract]	'	'
Finished goods	$27,638	$21,756
Raw materials	7,448	5,269
Other	290	115
Total inventory	$35,376	$27,140

Inventories_Additional_Informa

Inventories - Additional Information (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013
Inventory [Line Items]	'
Write-down of inventory	$12,360
Pasadena Facility [Member]	'
Inventory [Line Items]	'
Write-down of inventory	$12,400

Property_Plant_and_Equipment_P

Property, Plant and Equipment - Property, Plant and Equipment (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, gross	$410,186	$193,443
Less accumulated depreciation	-75,526	-59,248
Total property, plant and equipment, net	334,660	134,195
Land and Land Improvements [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, gross	26,149	22,988
Building and Building Improvements [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, gross	33,096	27,120
Machinery and Equipment and Catalysts [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, gross	334,645	135,636
Furniture Fixtures and Office Equipment [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, gross	1,137	1,085
Computer Equipment and Computer Software [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, gross	7,977	5,981
Vehicles [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, gross	4,624	309
Leasehold Improvements [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, gross	2,348	114
Other [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, gross	$210	$210

PropertyPlant_and_Equipment_Co

Property,Plant and Equipment - Construction in Progress (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Oct. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Oct. 31, 2012
Property, Plant and Equipment [Line Items]	'	'	'
Construction in progress	$60,136	$61,417	$7,011
Construction in Progress for East Dubuque Facility [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Construction in progress	2,195	52,435	'
Construction in Progress for Pasadena Facility [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Construction in progress	31,335	8,512	'
Fulghum Fibers [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Construction in progress	273	'	'
Wawa Project [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Construction in progress	17,007	'	'
Atikokan Project [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Construction in progress	8,458	'	'
Other Construction In Progress [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Construction in progress	$868	$470	'

Property_Plant_and_Equipment_A

Property, Plant and Equipment - Additional Information (Detail) (USD $)	12 Months Ended		0 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	13-May-13	Jun. 07, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012
	Weyerhaeuser Corporation [Member]	Weyerhaeuser Corporation [Member]	Atikokan Renewable Fuels [Member]	Atikokan Renewable Fuels [Member]	Construction In Progress [Member]	Construction In Progress [Member]
	t			t
Property, Plant and Equipment [Line Items]	'	'	'	'	'	'
Portion of capitalized interest costs included in construction in progress	'	'	'	'	$0.80	$0.90
Purchase price	'	'	3.8	'	'	'
Production of wood pellets	450,000	'	'	90,000	'	'
Potential earn-out consideration, percentage of EBITDA	'	'	7.00%	'	'	'
Period of potential earn-out consideration	'	'	'10 years	'	'	'
Loan to sellers repayable from earn-out consideration	'	'	0.9	'	'	'
Purchase price	'	$5.50	'	'	'	'

Goodwill_Reconciliation_of_Cha

Goodwill - Reconciliation of Change in Carrying Value of Goodwill (Detail) (USD $)	3 Months Ended	12 Months Ended			12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2013	Oct. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2013
	Sep. 30, 2013	Dec. 31, 2013	Oct. 31, 2012	Dec. 31, 2011	Agrifos [Member]	Energy Technologies [Member]	Pasadena [Member]	Fulghum [Member]
Goodwill [Line Items]	'	'	'	'	'	'	'	'
Beginning balance	'	$56,592	$57,231	$7,209	'	'	'	'
Acquisition of goodwill	'	'	'	'	56,592	'	639	29,932
Goodwill impairment	-30,000	-30,029	'	'	'	-7,209	-30,029	'
Ending balance	'	$57,134	$57,231	$7,209	'	'	'	'

Impairments_Additional_Informa

Impairments - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2011	Sep. 30, 2011
	Sep. 30, 2013	Dec. 31, 2013	Subsidiary	Port St. Joe Project [Member]	Natchez Project [Member]
Schedule Of Loss On Impairment [Line Items]	'	'	'	'	'
Write down inventory	'	$12,360,000	'	'	'
Goodwill impairment loss	30,000,000	30,029,000	'	'	'
Change in fair value assumption of goodwill	'	5.00%	'	'	'
Expected goodwill impairment charges on change in fair value assumption gross margin rate on sale	'	15,000,000	'	'	'
Expected goodwill impairment charges on change in fair value assumption discount rate	'	0.01	'	'	'
Expected goodwill impairment charges on change in fair value assumption gross margin rate on sale	'	16,500,000	'	'	'
Number of subsidiaries	'	'	2	'	'
Impairment Loss On Intangible Assets	'	'	16,000,000	'	'
Contingent consideration, liability	'	'	'	1,600,000	'
Appraised value of property	'	'	'	'	$2,500,000

Impairments_Financial_Impact_R

Impairments - Financial Impact Recorded in Statement of Operations (Detail) (USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2011
Schedule Of Loss On Impairment [Line Items]	'	'	'	'	'
Loss on impairments	($583)	($53)	($15,965)	($59,272)	($58,742)
Rialto Project [Member]	'	'	'	'	'
Schedule Of Loss On Impairment [Line Items]	'	'	'	'	'
Loss on impairments	'	'	'	'	-27,238
Natchez Project [Member]	'	'	'	'	'
Schedule Of Loss On Impairment [Line Items]	'	'	'	'	'
Loss on impairments	'	'	'	'	-26,645
Port St. Joe Project [Member]	'	'	'	'	'
Schedule Of Loss On Impairment [Line Items]	'	'	'	'	'
Loss on impairments	'	'	'	'	-4,806
Miscellaneous [Member]	'	'	'	'	'
Schedule Of Loss On Impairment [Line Items]	'	'	'	'	'
Loss on impairments	'	'	'	'	($53)

Debt_Additional_Information_De

Debt - Additional Information (Detail) (USD $)

3 Months Ended

12 Months Ended

0 Months Ended

3 Months Ended

12 Months Ended

Share data in Millions, unless otherwise specified

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Sep. 30, 2011

Dec. 31, 2013

Apr. 12, 2013

Feb. 28, 2012

Dec. 31, 2013

Apr. 12, 2013

Dec. 31, 2013

Apr. 30, 2013

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Sep. 30, 2011

Sep. 24, 2013

Dec. 31, 2013

Dec. 31, 2012

Oct. 31, 2012

Dec. 31, 2013

Oct. 31, 2012

Dec. 31, 2013

Nov. 25, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Sep. 23, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Senior Notes [Member]

Term Loan [Member]

Revolving Credit Facility [Member]

Bom Revolving Credit Facility [Member]

2013 RNP Credit Agreement [Member]

Fulghum [Member]

RNHI [Member]

Two Thousand Twelve Credit Agreement [Member]

RNHI Revolving Loan [Member]

RNP Note Payable [Member]

Convertible Notes [Member]

Secured leverage ratio less than one point seven five [Member]

Secured leverage ratio equal to or more than one point seven five [Member]

Minimum [Member]

Maximum [Member]

United States [Member]

South America [Member]

Revolving Credit Facility [Member]

Capex Facility [Member]

Bom Revolving Credit Facility [Member]

RNHI [Member]

Debt Instrument [Line Items]

Long Term Debt Outstanding

$421,979,000

$193,290,000

$47,000,000

$193,300,000

$50,000,000

$320,000,000

Multiple draw term loan

100,000,000

35,000,000

110,000,000

35,000,000

Term loan used to finance cash consideration paid in the acquisition of Agrifos and transaction expenses

155,000,000

Maturity date instrument

15-Apr-21

31-Oct-17

Credit facility interest rate description

'Interest at a rate equal to an applicable margin plus, at the Borrowers' option, either (a) in the case of base rate borrowings, a rate equal to the highest of (1) the prime rate, (2) the federal funds rate plus 0.5% or (3) LIBOR for an interest period of three months plus 1.00% or (b) in the case of LIBOR borrowings, the offered rate per annum for deposits of dollars for the applicable interest period on the day that is two business days prior to the first day of such interest period.

'Interest at a rate equal to LIBOR plus 4.00% per annum

'interest at a rate equal to an applicable margin plus, at RNLLC's option, either (a) in the case of base rate borrowings, a rate equal to the highest of (1) the prime rate, (2) the federal funds rate plus 0.5% or (3) LIBOR for an interest period of three months plus 1.00% or (b) in the case of LIBOR borrowings, the offered rate per annum for deposits of dollars for the applicable interest period on the day that was two business days prior to the first day of such interest period. The applicable margin for borrowings under the 2012 Credit Agreement was 2.75% with respect to base rate borrowings and 3.75% with respect to LIBOR borrowings

Fee to lenders on average undrawn available portion of credit facility

0.50%

0.75%

Interest rate on borrowings under credit agreement, LIBOR plus percentage

1.00%

Margin for borrowings with respect to base rate borrowings

2.25%

2.50%

2.75%

Margin for borrowings with respect to LIBOR borrowings

3.25%

3.50%

3.75%

Interest rate on borrowings under credit agreement, federal funds plus percentage

0.50%

Senior secured notes issued

320,000,000

Senior secured note interest percentage

6.50%

Date of first required payment

15-Oct-13

Debt instrument redemption price as percentage of principal amount

100.00%

Debt instrument redemption percentage of principal amount before specified date maximum

35.00%

Equity offering percentage of principal amount

106.50%

Debt instrument latest call date

15-Apr-16

Multiple draw term loan

35,000,000

Amount of letter of credit sublimit

10,000,000

Line of credit facility expected increase in borrowing capacity maximum

15,000,000

Secured leverage ratio prescribed for borrowing

3.75

Secured leverage ratio at reporting date

4.71

outstanding advances under RNP Credit facility

193,290,000

Debt instrument leverage ratio

1.75

Repayment of obligations under Notes, subject to first lien cap

65,000,000

Repayment of obligations under Notes, subject to percentage of RNP's consolidated net tangible assets

20.00%

Line of credit facility minimum repayment or cancellation under agreement

5,000,000

BOM Credit Agreement Expiry Date

25-Nov-15

12-Apr-18

Outstanding debt

45,300,000

40,700,000

4,600,000

Weighted average interest rate

7.00%

Maturity dates range, description

'Maturity dates ranging from 2015 through 2028

Maturity dates range

'2015

'2028

Total amount under revolving loan facility

3,000,000

100,000,000

Revolving loan borrowed

50,000,000

Common unit held by RNHI in RNP

23.25

Number of Common unit given as collateral

15.4

Number of common unit expected to be provided as collateral

19.4

Spread rate over LIBOR

4.00%

Refinancing fee to be paid

2.75%

Revolving loan collateral fee

0.007

Revolving loan maturity period

'3 years

Letter of credit fee

3.75%

Percentage of commitment fee

0.75%

Letters of credit issued

1,100,000

Constructed capacity

75,000

Loss on extinguishment of debt

($10,263,000)

($4,593,000)

($6,001,000)

($4,801,000)

($19,486,000)

($13,816,000)

($10,300,000)

($4,800,000)

($13,800,000)

($6,000,000)

($2,100,000)

($2,700,000)

Debt_Longterm_Debt_Detail

Debt - Long-term Debt (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]	'	'
Total debt	$421,979	'
Less: current portion	-9,916	-7,750
Long-term debt	412,063	185,540
Fulghum [Member]	'	'
Debt Instrument [Line Items]	'	'
Outstanding debt	45,290	'
Plus: unamortized premium	2,162	'
Total debt	47,452	'
Less: current portion	-8,401	'
Long-term debt	$39,051	'

Debt_Summary_of_Total_Debt_Det

Debt - Summary of Total Debt (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]	'	'
Long Term Debt Outstanding	$421,979	$193,290
Less: current portion	-9,916	-7,750
Long-term debt	412,063	185,540
Second 2012 Credit Agreement [Member]	'	'
Debt Instrument [Line Items]	'	'
Long Term Debt Outstanding	'	193,290
RNP Note Payable [Member]	'	'
Debt Instrument [Line Items]	'	'
Long Term Debt Outstanding	320,000	'
Fulghum [Member]	'	'
Debt Instrument [Line Items]	'	'
Long Term Debt Outstanding	47,452	'
RNHI Revolving Loan [Member]	'	'
Debt Instrument [Line Items]	'	'
Long Term Debt Outstanding	50,000	'
QS Construction Facility [Member]	'	'
Debt Instrument [Line Items]	'	'
Long Term Debt Outstanding	$4,527	'

Debt_Future_Maturities_of_Long

Debt - Future Maturities of Long-term Debt (Detail) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2013
Debt Disclosure [Abstract]	'
2014	$9,916
2015	7,324
2016	55,535
2017	4,285
2018	1,636
Thereafter	343,283
Total debt	$421,979

Advance_for_Equity_Investment_

Advance for Equity Investment - Additional Information (Detail) (Peabody Venture Fund [Member], USD $)	1 Months Ended
In Millions, unless otherwise specified	31-May-07
Peabody Venture Fund [Member]	'
Schedule Of Investments In Joint Venture [Line Items]	'
Equity option fund	$10
Development costs	20.00%
Percentage equity contributions	20.00%
Advance for equity investment	$7.90

Commitments_and_Contingencies_1

Commitments and Contingencies - Commitments for Natural Gas Purchases (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
	MMBTU	MMBTU
Oil and Gas Delivery Commitments and Contracts [Line Items]	'	'
Total MMBtus under contracts	2,152,000	2,098,000
Commitments to purchase natural gas	$8,571	$7,531
Weighted average rate per MMBtu based on the fixed rates and the indexes applicable to each contract	3.98	3.59
MMBtus under Fixed-Price Contracts [Member]	'	'
Oil and Gas Delivery Commitments and Contracts [Line Items]	'	'
Total MMBtus under contracts	2,071,000	1,955,000
MMBtus under Index-Price Contracts [Member]	'	'
Oil and Gas Delivery Commitments and Contracts [Line Items]	'	'
Total MMBtus under contracts	81,000	143,000

Commitments_and_Contingencies_2

Commitments and Contingencies - Additional Information (Detail) (USD $)

3 Months Ended

12 Months Ended

0 Months Ended

3 Months Ended

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Sep. 30, 2011

Apr. 17, 2013

Dec. 31, 2013

Nov. 25, 2013

Mar. 31, 2014

MMBTU

2013 Drax Contract [Member]

Ontario Power Generation [Member]

Canadian National Contract [Member]

KD Contract [Member]

Subsequent Event [Member]

Wood Pellets [Member]

Minimum [Member]

Maximum [Member]

MMBTU

Rail_Carloads

Subsequent Event [Line Items]

Total MMBtus associated with additional forward purchase contracts

2,152,000

2,098,000

500,000

Purchase commitments

$4,500,000

Weighted average rate per MMBtu

3.98

3.59

9.27

Total lease expense

600,000

2,000,000

2,400,000

2,100,000

Operating leases expiration period

31-Oct-28

Engineering, procurement and construction contract value

25,000,000

Guaranteed obligations

20,000,000

Wood pallets required to sell from Wawa Project to Drax

400,000

Contract term period

'10 years

'5 years

Contract term period

'10 years

Quantity required to deliver under Atikokan Project

45,000

Maximum quantity required to deliver under Atikokan Project

90,000

Location of Atikokan Project from port of Quebec

1,300

Location of Wawa Project from port of Quebec

1,100

Minimum rail carloads committed to transport during next fiscal year

1,500

Minimum rail carloads committed to transport thereafter

3,600

Penalty for delivery shortfalls per car

1,000

Purchase contract Period

'1 year

Committed quantity of wood pellets to be purchased

15,000

20,000

Estimated time of installation of ammonia safety flare

1-Dec-15

Cost of project under settlement agreement with environmental protection agency

$300,000

Commitments_and_Contingencies_3

Commitments and Contingencies - Summary of Future Minimum Lease Payments (Detail) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2013
Commitments And Contingencies Disclosure [Abstract]	'
2014	$3,382
2015	3,631
2016	2,656
2017	2,117
2018 and thereafter	14,874
Total	$26,660

Stockholders_Equity_Additional

Stockholders' Equity - Additional Information (Detail) (USD $)

0 Months Ended

1 Months Ended

12 Months Ended

24 Months Ended

0 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

Apr. 22, 2013

Feb. 29, 2012

Dec. 31, 2013

Dec. 31, 2012

Sep. 30, 2011

Sep. 30, 2009

Dec. 31, 2013

Dec. 31, 2011

Jul. 09, 2013

Dec. 28, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Sep. 30, 2011

Dec. 31, 2013

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Sep. 30, 2011

Dec. 31, 2011

Maximum [Member]

SilvaGas Holdings Corporation [Member]

Series D Junior Participating Preferred Stock [Member]

Performance Stock Units [Member]

Restricted Stock Units (RSUs) [Member]

2011 LTIP [Member]

Restricted Stock [Member]

Executive Officer [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Aggregate initial offering price

$200,000,000

Weighted average closing share price as per performance vesting requirement for special distribution

Trial period of weighted average closing share price

'30 days

Special one time distribution per share

$0.19

Special dividend payment accrued for PSU

300,000

Special distribution payment

500,000

43,300,000

43,800,000

Dividend per share added to closing price

$0.19

Common stock repurchased authorized amount

25,000,000

Repurchase of common stock, period

'12 months

Shares repurchased

9,100,000

Aggregate purchase price of shares

16,400,000

Shares released from escrow account

3,400,000

Payment of shares as final consideration

2,000,000

Issuance of shares in patents

2,000,000

Vesting of restricted stock unit award

'12 days

'3 years

Minimum percentage of acquired outstanding shares of the Companies common stock

4.99%

Outstanding shares of the Companies common stock

1.00%

Share Price

$3.75

Company has reserved Preferred Stock

45,000

Cash bonus awards allocated to purchase vested restricted stock

10.00%

Options awarded to group of employees

3,000,000

Accrued compensation expense

$1,900,000

Company's value weighted average share price period

'30 days

Company's value weighted average share price

Time vested restricted stock awards

3,500,000

2,000,000

1,100,000

2,200,000

2,000,000

Adjustment in the event of certain transactions or changes in capitalization

4,483,000

3,580,000

4,483,000

3,825,000

Stockholders_Equity_Performanc

Stockholders' Equity - Performance Shares and Restricted Stock Units Issued by the Company (Detail)	3 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2011
Type of Award	'	'	'	'
Total	6,468,000	4,999,000	3,099,000	2,195,000
Performance Awards [Member]	'	'	'	'
Type of Award	'	'	'	'
Total	2,960,000	3,005,000	1,963,000	'
Time Vested Awards [Member]	'	'	'	'
Type of Award	'	'	'	'
Total	3,508,000	1,994,000	1,136,000	2,195,000

Accounting_for_Equity_Based_Co2

Accounting for Equity Based Compensation - Additional Information (Detail) (USD $)

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 12, 2012

Sep. 30, 2011

Dec. 31, 2013

Dec. 31, 2012

Sep. 30, 2011

Dec. 31, 2012

Sep. 30, 2011

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Sep. 30, 2011

Sep. 30, 2010

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Sep. 30, 2011

Dec. 31, 2005

Sep. 30, 2010

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Sep. 30, 2011

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Sep. 30, 2011

Sep. 30, 2010

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Sep. 30, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Sep. 30, 2011

Director [Member]

Consultant [Member]

Stock Option [Member]

Warrants [Member]

Phantom Share Units (PSUs) [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units and Performance Share Award [Member]

Performance Shares [Member]

Adjustment for Special Distribution [Member]

2005 Stock Option Plan [Member]

2006 and 2009 Incentive [Member]

2005 and 2009 stock option [Member]

2011 LTIP [Member]

2006 Incentive Award Plan [Member]

2009 Incentive Award Plan [Member]

Stock Option [Member]

Minimum [Member]

Maximum [Member]

Minimum [Member]

Maximum [Member]

Phantom Share Units (PSUs) [Member]

Stock Option [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units and Performance Share Award [Member]

Installment

Director [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vesting of restricted stock unit award

'12 days

'3 years

'1 year

'3 years

'1 year

Tax benefit

Period for using last day of the month stock price to project expected stock price volatility

'54 months

Adjustment for special dividend

14,820,000

15,473,000

4,672,000

3,490,000

4,472,000

4,935,000

2,407,000

17,000

33,000

244,000

312,000

195,000

1,338,000

1,710,000

1,322,000

1,745,000

Expiration term of options under the company's 2005 stock option plan

'5 years

'3 years

'10 years

Total intrinsic value of options exercised

21,000

900,000

300,000

Unrecognized compensation cost

25,460

3,000,000

8,000,000

Weighted-average period for cost to be recognized

'9 months

'1 year 10 months 24 days

Number of Shares, Granted

1,980,000

3,500,000

163,388

116,508

54,059

6,468,000

4,999,000

3,099,000

2,195,000

1,322,000

1,745,000

2,567,000

1,812,000

9,991,000

9,223,000

8,963,000

4,228,000

Exercise price of common stock

$1.82

Percentage increase in vested warrants, Year One

10.00%

Percentage increase in vested warrants, Year two

15.00%

Percentage increase in vested warrants, Year three

20.00%

Percentage increase in vested warrants, Year Four

25.00%

Weighted average price of vested warrants, Year one

$2.10

Weighted average price of vested warrants, Year Two

$2.75

Weighted average price of vested warrants, year Three

$3.50

Weighted average price of vested warrants, Year Four

$4.25

Percentage increase in non vested warrants

30.00%

Weighted average price of non vested warrants

$5.25

Shares vested

394,000

2,082,500

739,000

2,680,000

2,080,000

1,212,000

Shares nonvested

1,050,000

Warrants assigned to a third party

262,500

Warrants held to a third party

787,500

Original warrant vested

787,500

Other warrants held

393,750

Warrants expired

31-Dec-11

Shares vest on each annual anniversary date of the commencement date of the agreement

'One-third

Vesting of the restricted stock unit grant

'3 months

Vesting of the restricted stock unit grant change in control

'2 years

Share based awards, key assumptions, expected volatility rate

104.00%

57.51%

Share based awards, key assumptions, risk-free rate

0.64%

Share based awards, key assumptions, dividend yield

0.00%

Outstanding RSU's and Performance Share Awards

10,424,000

1,250,000

10,424,000

14,576,000

12,596,000

163,388

193,632

154,938

11,888,000

11,330,000

11,001,000

11,888,000

6,623,000

7,560,000

RSU's not granted

17,000

358,000

583,000

Grant date fair value of RSU's and Performance Share Awards

1,200,000

3,900,000

4,200,000

2,400,000

Shares issued

6,468,000

4,999,000

3,099,000

2,195,000

178,400

234,400

440,000

25,000

259,400

465,000

116,508

5,510

Accrued compensation expense

$401,400

$401,000

$400,000

$52,000

$32,000

$216,000

$516,000

$658,000

$761,000

$6,000

$26,000

$1,200,000

$1,900,000

$843,000

$5,005,000

$6,889,000

$480,000

$63,000

$1,460,000

$2,827,000

$300,000

Phantom units award

108,218

2,780

Number of installment for Phantom units award

Weighted-average period

'2 years 2 months 12 days

Accounting_for_Equity_Based_Co3

Accounting for Equity Based Compensation - Charges Associated with All Equity Based Grants (Detail) (Equity Based Grant [Member], USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2011
Equity Based Grant [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Compensation expense	$1,015,000	$5,319,000	$7,357,000	$1,063,000
Board compensation expense	50,000	603,000	591,000	604,000
Total compensation expense	1,065,000	5,922,000	7,948,000	1,667,000
Consulting expense	9,000	18,000	74,000	62,000
Total expense	$1,074,000	$5,940,000	$8,022,000	$1,729,000
Reduction to both basic and diluted earnings per share from compensation expense	'	$0.03	$0.04	$0.01

Accounting_for_Equity_Based_Co4

Accounting for Equity Based Compensation - Fair Value of Options and Warrants (Detail)	3 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2013	Dec. 12, 2012	Sep. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Risk-free interest rate, Minimum	1.16%	'	'	1.55%
Risk-free interest rate	'	'	'	'
Expected volatility, Minimum	'	'	'	97.00%
Expected volatility	104.00%	'	'	'
Expected life (in years)	'	'	'	'
Dividend yield	0.00%	'	'	0.00%
Forfeiture rate	14.00%	'	'	'
Risk-free interest rate, Maximum	1.74%	'	'	2.69%
Expected volatility, Maximum	'	'	'	98.00%
Minimum [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Expected life (in years)	'6 years	'	'	'5 years
Forfeiture rate	'	'	'	0.00%
Maximum [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Expected life (in years)	'8 years	'	'	'8 years
Forfeiture rate	'	'	'	8.00%

Accounting_for_Equity_Based_Co5

Accounting for Equity Based Compensation - Number of Share Reserved, Outstanding and Available for Issuance (Detail)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Sep. 30, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Shares Reserved	43,437,000	'	'	'	'
Shares Underlying Outstanding Awards	14,820,000	15,473,000	'	'	'
Shares Available for Issuance	4,483,000	3,580,000	'	'	'
Stock Option [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Shares Underlying Outstanding Awards	3,490,000	4,472,000	4,672,000	4,935,000	2,407,000
Restricted Stock Units (RSUs) [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Shares Reserved	1,225,000	'	'	'	'
Shares Underlying Outstanding Awards	17,000	33,000	'	'	'
2005 Stock Option Plan [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Shares Reserved	1,000,000	'	'	'	'
Shares Underlying Outstanding Awards	195,000	195,000	'	'	'
2006 Incentive Award Plan [Member] \| Stock Option [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Shares Reserved	8,000,000	'	'	'	'
Shares Underlying Outstanding Awards	1,338,000	1,710,000	'	'	'
Shares Available for Issuance	'	67,000	'	'	'
2006 Incentive Award Plan [Member] \| Restricted Stock Units (RSUs) [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Shares Underlying Outstanding Awards	1,322,000	1,745,000	'	'	'
2009 Incentive Award Plan [Member] \| Stock Option [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Shares Reserved	32,900,000	'	'	'	'
Shares Underlying Outstanding Awards	1,713,000	2,255,000	'	'	'
Shares Available for Issuance	4,483,000	3,513,000	'	'	'
2009 Incentive Award Plan [Member] \| Restricted Stock Units (RSUs) [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Shares Underlying Outstanding Awards	9,991,000	9,223,000	'	'	'
Adjustment for Special Distribution [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Shares Reserved	312,000	'	'	'	'
Shares Underlying Outstanding Awards	244,000	312,000	'	'	'
Adjustment for Special Distribution [Member] \| Stock Option [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Shares Underlying Outstanding Awards	'	312,000	'	'	'
Incentive Award Plan [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Shares Reserved	42,212,000	'	'	'	'
Shares Underlying Outstanding Awards	14,803,000	15,440,000	'	'	'
Shares Available for Issuance	4,483,000	3,580,000	'	'	'

Accounting_for_Equity_Based_Co6

Accounting for Equity Based Compensation - Charges Associated with Equity Based Compensation (Detail) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2011
2011 LTIP [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock based compensation expense	$63,000	$1,460,000	$2,827,000	'
Restricted Stock Units and Performance Share Award [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Compensation expense	793,000	4,803,000	6,699,000	405,000
Board compensation expense	50,000	202,000	190,000	75,000
Stock based compensation expense	843,000	5,005,000	6,889,000	480,000
Stock Option [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Compensation expense	216,000	516,000	658,000	632,000
Board compensation expense	'	'	'	129,000
Stock based compensation expense	216,000	516,000	658,000	761,000
Consulting expense	9,000	18,000	22,000	30,000
Total expense	225,000	534,000	680,000	791,000
Warrants [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Compensation expense	6,000	'	'	26,000
Board compensation expense	'	'	'	'
Stock based compensation expense	$6,000	'	'	$26,000

Accounting_for_Equity_Based_Co7

Accounting for Equity Based Compensation - Equity Based Compensation Transactions (Detail) (USD $)

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2010

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Sep. 30, 2011

Dec. 31, 2005

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Sep. 30, 2011

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Sep. 30, 2011

Dec. 31, 2012

Adjustment for Special Distribution [Member]

Phantom Share Units (PSUs) [Member]

Warrants [Member]

Restricted Stock Units and Performance Share Award [Member]

Stock Option [Member]

Adjustment for Special Distribution [Member]

Schedule Of Share Based Compensation Restricted Stock Units Award Activity [Line Items]

Weighted Average Exercise Price, Beginning Balance

$1.77

$0.57

$1.96

$1.89

Outstanding, Beginning Balance

14,820,000

15,473,000

244,000

312,000

4,935,000

4,472,000

4,672,000

2,407,000

312,000

Weighted average grant date fair value, Beginning Balance

$23.78

$18.40

$1.18

$1.71

$1.37

$1.30

Adjustment for special distribution

14,820,000

15,473,000

244,000

312,000

4,672,000

3,490,000

4,472,000

4,935,000

312,000

Weighted Average Exercise Price, Granted

$0.99

Number of Shares, Granted

50,000

3,217,000

Weighted Average Exercise Price, Exercised

Weighted Average Exercise Price, Vested

$1.82

Number of Shares, Exercised

-32,000

-711,000

-276,000

Weighted Average Exercise Price, Exercised

$0.91

$1.27

Number of Shares, Canceled / Expired

-281,000

-271,000

-236,000

-689,000

Outstanding, Ending Balance

14,820,000

15,473,000

244,000

312,000

4,672,000

3,490,000

4,472,000

4,935,000

312,000

Weighted Average Exercise Price, Canceled / Expired

$1.82

$3.28

$1.82

Weighted Average Exercise Price, Beginning Balance

$1.75

$1.67

$1.64

$2.90

Weighted Average Exercise Price, Ending Balance

$1.96

$0.57

$1.96

$1.77

Warrants exercisable, Weighted Average Exercise Price

$1.96

$0.57

$1.77

Weighted Average Exercise Price, Granted

$1.58

$0.96

Weighted Average Exercise Price, Exercised

$0.95

$1.03

$1.10

Grant date fair value of each unit

$18.40

$18.71

$34.86

$0.64

$1.50

$1.66

$2.55

$0.98

Weighted Average Exercise Price, Cancelled/ Expired

$3.67

$2.40

$1.89

$2.06

Weighted average grant date fair value, vested and settled in shares

($23.42)

($15.68)

$1.08

$1.49

$1.35

Weighted Average Exercise Price, Ending Balance

$1.64

$1.59

$1.67

$1.75

Vested and Surrendered for Withholding Taxes Payable

($21.75)

($18.40)

$1.09

$1.37

$1.40

$1.33

Options exercisable, Number of shares

2,739,000

3,436,000

3,485,000

2,116,000

Aggregate intrinsic value - Ending balance

$23,793,000

$28,934,000

$2,144,448

$5,848,000

Weighted average grant date fair value, Canceled / Expired

($35.14)

($18.40)

$1.12

$2.18

$1.37

$1.30

Options exercisable, Weighted Average Exercise Price

$2.11

$1.60

$1.73

$2.81

Options exercisable, Aggregate Intrinsic Value

2,110,045

Weighted average grant date fair value, Ending Balance

$20.97

$23.78

$18.40

$1.37

$1.76

$1.71

$1.18

Weighted average fair value of options granted

$1.32

$0.78

Aggregate Intrinsic Value

23,793,000

28,934,000

2,144,448

5,848,000

Aggregate Intrinsic Value

$3,407,929

$5,839,626

Outstanding, Beginning Balance

154,938

163,388

14,576,000

1,250,000

10,424,000

12,596,000

6,623,000

11,001,000

11,888,000

7,560,000

Number of Shares, Granted

163,388

116,508

54,059

1,980,000

3,500,000

6,468,000

4,999,000

3,099,000

2,195,000

Vested and Settled in Shares

-49,409

-42,350

Number of Share, Vested and Settled

394,000

2,082,500

739,000

2,680,000

2,080,000

1,212,000

Number of Share, Exercised

-2,464,000

-5,156,000

Vested and Surrendered for Withholding Taxes Payable

-27,127

-20,040

-371,000

-1,812,000

-975,000

-578,000

Number of Shares, Canceled / Expired

-1,278

-119

-2,082,000

-4,018,000

-93,000

-178,000

-931,000

-1,342,000

Outstanding, Ending Balance

163,388

193,632

154,938

10,424,000

1,250,000

10,424,000

14,576,000

11,888,000

11,330,000

11,001,000

6,623,000

Warrants exercisable, Number of shares

10,424,000

1,250,000

14,576,000

Accounting_for_Equity_Based_Co8

Accounting for Equity Based Compensation - Summary of Options and Warrants Outstanding and Exercisable (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013
Stock Option [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Number Outstanding	3,490,000
Weighted Average Remaining Contractual Life in Years	'5 years 1 month 28 days
Weighted Average Exercise Price	$1.60
Number Exercisable	3,436,000
Exercisable, Weighted Average Exercise Price	$1.60
Stock Option [Member] \| Range One [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Range of Exercise Prices, Lower Range Limit	$0.56
Range of Exercise Prices, Upper Range Limit	$0.92
Number Outstanding	2,193,000
Weighted Average Remaining Contractual Life in Years	'6 years 7 months 6 days
Weighted Average Exercise Price	$0.88
Number Exercisable	2,166,000
Exercisable, Weighted Average Exercise Price	$0.88
Stock Option [Member] \| Range Two [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Range of Exercise Prices, Lower Range Limit	$0.96
Range of Exercise Prices, Upper Range Limit	$1
Number Outstanding	27,000
Weighted Average Remaining Contractual Life in Years	'7 years 5 months 27 days
Weighted Average Exercise Price	$0.96
Number Exercisable	18,000
Exercisable, Weighted Average Exercise Price	$0.96
Stock Option [Member] \| Range Three [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Range of Exercise Prices, Lower Range Limit	$1.12
Range of Exercise Prices, Upper Range Limit	$1.51
Number Outstanding	493,000
Weighted Average Remaining Contractual Life in Years	'2 years 8 months 19 days
Weighted Average Exercise Price	$1.31
Number Exercisable	475,000
Exercisable, Weighted Average Exercise Price	$1.30
Stock Option [Member] \| Range Four [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Range of Exercise Prices, Lower Range Limit	$2.07
Range of Exercise Prices, Upper Range Limit	$2.50
Number Outstanding	32,000
Weighted Average Remaining Contractual Life in Years	'2 years 3 months 22 days
Weighted Average Exercise Price	$2.07
Number Exercisable	32,000
Exercisable, Weighted Average Exercise Price	$2.07
Stock Option [Member] \| Range Five [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Range of Exercise Prices, Lower Range Limit	$3.50
Range of Exercise Prices, Upper Range Limit	$3.50
Number Outstanding	21,000
Weighted Average Remaining Contractual Life in Years	'2 years 11 months 12 days
Weighted Average Exercise Price	$3.50
Number Exercisable	21,000
Exercisable, Weighted Average Exercise Price	$3.50
Stock Option [Member] \| Range Six [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Range of Exercise Prices, Lower Range Limit	$3.87
Range of Exercise Prices, Upper Range Limit	$4
Number Outstanding	724,000
Weighted Average Remaining Contractual Life in Years	'2 years 6 months 18 days
Weighted Average Exercise Price	$3.88
Number Exercisable	724,000
Exercisable, Weighted Average Exercise Price	$3.88
Warrants [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Exercise Prices	$0.57
Number Outstanding	1,250,000
Weighted Average Remaining Contractual Life in Years	'9 years 3 months
Weighted Average Exercise Price	$0.57
Number Exercisable	1,250,000
Exercisable, Weighted Average Exercise Price	$0.57

Future_Minimum_Lease_Receipts_1

Future Minimum Lease Receipts - Schedule of Minimum Future Rentals on Noncancelable Operating Leases (Detail) (USD $)	Dec. 31, 2013
Leases [Abstract]	'
2014	$41,900
2015	90,951
2016	94,378
2017	91,629
2018	84,573
Minimum future rentals on noncancelable operating leases	$403,431

Employee_Benefit_Plans_Additio

Employee Benefit Plans - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2011
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Minimum age eligible to participate in defined contribution plan	'	'18 years	'	'
Partnership Contributed Defined Contribution Plans	$200,000	$1,200,000	$1,000,000	$900,000
Number of pension plan	'	'2	'	'
Period of service during a year of employment	'	'1000 hours	'	'
Retirement age	'	'55 years	'	'
Age limit up to which participants are eligible for supplements at retirement	'	'20 years	'	'
Age up to which supplements are paid	'	'65 years	'	'
Percentage of increase decrease in health care cost trend rate	'	1.00%	1.00%	'
Saving and Profit Sharing Plan [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Plan cost for the benefit of qualified employees	'	108,000	9,000	'
Pension [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Net periodic benefit cost	'	-56,000	'	'
Expected future partnership contribution for defined contribution plans	'	0	'	'
Postretirement [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Net periodic benefit cost	'	6,000	'	'
Expected future partnership contribution for defined contribution plans	'	$88,000	'	'
Range One [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Partnership Matching	'	100.00%	'	'
Participants salary deferrals	'	3.00%	'	'
Range Two [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Partnership Matching	'	50.00%	'	'
Participants salary deferrals	'	3.00%	'	'

Employee_Benefit_Plans_Summary

Employee Benefit Plans - Summary of Changes in Projected Benefit Obligation (Detail) (USD $)	2 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Fair value of plan assets	'	'	'
Fair value of plan assets at end of year	$4,333	$4,927	$4,333
Pension [Member]	'	'	'
Projected benefit obligation	'	'	'
Benefit obligation at beginning of year	'	4,841	5,213
Service cost	29	137	29
Interest cost	31	194	31
Amendment	'	'	'
Actuarial (gain) loss	'	-528	-412
Actual benefit paid	'	-139	-20
Benefit obligation at end of year	4,841	4,505	4,841
Fair value of plan assets	'	'	'
Fair value of plan assets at beginning of year	'	4,333	4,279
Actual return on plan assets	'	624	74
Employer contributions	'	109	'
Actual benefit paid	'	-139	-20
Fair value of plan assets at end of year	4,333	4,927	4,333
Funded status at end of year	-508	422	-508
Amounts recognized in the consolidated balance sheet	'	'	'
Noncurrent assets	'	422	'
Current liabilities	'	'	'
Noncurrent liabilities	-508	'	-508
Total liabilities	-508	422	-508
Postretirement [Member]	'	'	'
Projected benefit obligation	'	'	'
Benefit obligation at beginning of year	'	1,136	863
Service cost	4	43	4
Interest cost	5	43	5
Amendment	'	'	332
Actuarial (gain) loss	'	-233	-54
Actual benefit paid	'	-136	-14
Benefit obligation at end of year	1,136	853	1,136
Fair value of plan assets	'	'	'
Fair value of plan assets at beginning of year	'	'	'
Actual return on plan assets	'	'	'
Employer contributions	'	136	14
Actual benefit paid	'	-136	-14
Fair value of plan assets at end of year	'	'	'
Funded status at end of year	-1,136	-853	-1,136
Amounts recognized in the consolidated balance sheet	'	'	'
Noncurrent assets	'	'	'
Current liabilities	-95	-86	-95
Noncurrent liabilities	-1,041	-767	-1,041
Total liabilities	($1,136)	($853)	($1,136)

Employee_Benefit_Plans_Compone

Employee Benefit Plans - Components of Net Periodic Benefit Cost and Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Detail) (USD $)	2 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Other changes in plan assets and benefit obligations recognized in other comprehensive income	'	'	'
Total recognized in other comprehensive (income) loss	'	($1,143)	($166)
Pension [Member]	'	'	'
Net periodic benefit cost	'	'	'
Service cost	29	137	29
Interest cost	31	194	31
Expected return on plan assets	-42	-260	'
Amortization of prior service cost	'	'	'
Amortization of net gain	'	-5	'
Net periodic pension costs	18	66	'
Other changes in plan assets and benefit obligations recognized in other comprehensive income	'	'	'
Net actuarial gain	-444	-893	'
Recognized actuarial gain	'	5	'
Total recognized in other comprehensive (income) loss	-444	-888	'
Postretirement [Member]	'	'	'
Net periodic benefit cost	'	'	'
Service cost	4	43	4
Interest cost	5	43	5
Expected return on plan assets	'	'	'
Amortization of prior service cost	'	22	'
Amortization of net gain	'	'	'
Net periodic pension costs	9	108	'
Other changes in plan assets and benefit obligations recognized in other comprehensive income	'	'	'
Net actuarial gain	-54	-233	'
Prior service cost	332	'	'
Recognized prior service cost	'	-22	'
Total recognized in other comprehensive (income) loss	$278	($255)	'

Employee_Benefit_Plans_Summary1

Employee Benefit Plans - Summary of Recognized in Accumulated Other Comprehensive Income (Loss) (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Pension [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Net (gain) loss	($1,332)	($444)
Prior service costs	'	'
Total recognized in other comprehensive (income) loss	-1,332	-444
Postretirement [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Net (gain) loss	-287	-54
Prior service costs	310	332
Total recognized in other comprehensive (income) loss	$23	$278

Employee_Benefit_Plan_Weighted

Employee Benefit Plan - Weighted Average Assumptions Used to Determine Benefit Obligations (Detail)	Dec. 31, 2013	Dec. 31, 2012
Pension [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Discount rate	4.80%	4.10%
Postretirement [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Discount rate	4.70%	4.00%

Employee_Benefit_Plans_Weighte

Employee Benefit Plans - Weighted Average Assumptions Used to Determine Net Pension Cost (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Pension [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Discount rate	4.10%	3.60%
Expected rate of return on assets	6.00%	6.00%
Postretirement [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Discount rate	4.00%	3.60%
Expected rate of return on assets	'	'
Health care cost trend: initial	7.25%	7.50%
Health care cost trend: ultimate	5.00%	5.00%
Year ultimate reached	'2023	'2023

Employee_Benefit_Plans_Schedul

Employee Benefit Plans - Schedule of Allocation of Plan Assets (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Mutual Funds - Equity [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Target Allocation	50.00%	50.00%
Percentage of Pension Plan	52.00%	51.00%
Mutual Funds - Fixed Income [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Target Allocation	50.00%	50.00%
Percentage of Pension Plan	48.00%	49.00%

Employee_Benefit_Plans_Summary2

Employee Benefit Plans - Summary of Pension Plan Assets Measured at Fair Value (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]	'	'
Fair value of plan assets	$4,927	$4,333
Mutual Funds - Equity [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Fair value of plan assets	2,560	2,193
Mutual Funds - Fixed Income [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Fair value of plan assets	2,356	2,134
Cash [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Fair value of plan assets	$11	$6

Employee_Benefit_Plans_Schedul1

Employee Benefit Plans - Schedule of Expected Benefit Contribution (Detail) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2013
Pension [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
2014	$193
2015	206
2016	211
2017	223
2018	228
2019-2023	1,259
Postretirement [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
2014	88
2015	79
2016	58
2017	68
2018	63
2019-2023	$226

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended				12 Months Ended
	Oct. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	2-May-13	Apr. 30, 2013
	Oct. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Chile [Member]	Uruguay [Member]	Fulghum [Member]	Fulghum [Member]	Fulghum [Member]
Income Taxes [Line Items]	'	'	'	'	'	'	'	'	'	'
Acquisition date	'	'	'	'	'	'	'	1-May-13	'	'
Deferred income taxes	'	'	'	'	'	'	'	'	$35,300,000	$35,262,000
Deferred tax liabilities related to identifiable tangible and intangible assets	'	'	'	'	'	'	'	'	15,800,000	'
Deferred tax liabilities	'	'	'	'	'	'	'	37,800,000	'	'
Valuation reserve	'	'	'	'	'	'	'	27,400,000	'	'
Number of years of profitability determining realizability of deferred tax assets	'	'3 years	'	'	'	'	'	'	'	'
Percent of equity interest owned	100.00%	'	'	'	'	88.00%	87.00%	'	'	'
Unrecognized tax benefits	'	4,268,000	2,754,000	2,754,000	2,754,000	'	'	'	'	'
Unrecognized tax benefits that would impact effective tax rate if recognized	'	1,500,000	'	'	'	'	'	'	'	'
Unrecognized tax benefits that would not impact effective tax rate if recognized	'	2,800,000	'	'	'	'	'	'	'	'
Period not reasonably possible that unrecognized tax benefits will significantly decrease	'	'Next 12 months	'	'	'	'	'	'	'	'
Provision related to uncertain positions	'	'	'	'	'	$900,000	$700,000	'	'	'

Income_Taxes_Provision_Benefit

Income Taxes - Provision (Benefit) for Income Taxes (Detail) (USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2011
Current:	'	'	'	'	'	'
Federal	'	'	$66	$104	'	'
State	2	'	359	1,260	'	3
Foreign	'	'	114	'	'	'
Total Current	2	'	539	1,364	'	3
Deferred:	'	'	'	'	'	'
Federal	'	'	-22,038	'	'	'
State	'	'	-5,092	'	'	'
Foreign	'	'	'	'	'	'
Total Deferred	'	'	-27,130	'	'	'
Income tax expense From continuing operations	$2	$2	($26,591)	$1,364	$6	$3

Income_Taxes_Income_Taxes_at_t

Income Taxes - Income Taxes at the Federal Statutory Rate (Detail) (USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2011
Income Tax Disclosure [Abstract]	'	'	'	'	'	'
Federal income tax benefit calculated at the federal statutory rate	($2,730)	'	($9,009)	$9,979	'	($21,885)
Impact of foreign earnings	'	'	669	'	'	'
State income tax benefit net of federal benefit	3,882	'	-1,133	-830	'	-3,069
Permanent differences, other	136	'	330	375	'	434
Return to provision	'	'	467	'	'	'
Change in state tax rate	'	'	'	1,020	'	-2,164
Minority interest, net of state tax benefit	'	'	-624	-13,153	'	'
Partnership state taxes	'	'	-96	303	'	'
Research and development ("R&D") credit	'	'	-6,191	'	'	'
Basis difference in foreign subsidiaries	'	'	374	'	'	'
Partnership basis difference	93,527	'	-1,022	-3,439	'	'
Change in valuation allowance	-94,813	'	-10,424	7,109	'	26,687
Other items	'	'	68	'	'	'
Income tax expense From continuing operations	$2	$2	($26,591)	$1,364	$6	$3

Income_Taxes_Components_of_the

Income Taxes - Components of the Net Deferred Tax Liability and Net Deferred Tax Asset (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current:	'	'
Accruals for financial statement purposes not allowed for income taxes	$2,626	$2,511
Basis difference in prepaid expenses	-344	-366
Inventory	'	84
Unrealized gain	-12	'
Valuation allowance	-1,130	-1,463
Current, net	1,140	766
Long-Term:	'	'
Net operating loss and AMT credit carryforwards	55,066	42,810
R&D credit carryforward	6,191	'
Basis difference relating to Intangibles	-11,336	722
Basis difference in property, plant and equipment	-11,421	15,770
Stock option exercises	3,344	6,309
Basis difference in foreign subsidiaries	-6,142	'
Basis difference in partnership interest	-19,051	-29,375
Other items	1,652	663
Valuation allowance	-27,574	-37,665
Long-Term, net	-9,271	-766
Total deferred tax liabilities, net	($8,131)	'

Income_Taxes_Available_Carryfo

Income Taxes - Available Carryforwards to Offset Future Taxable Income (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013
Operating Loss Carryforwards [Line Items]	'
R&D federal credit	$6,981
Alternative minimum tax credit	1,471
Operating loss carryforwards expiration, start	'2016
Operating loss carryforwards expiration, end	'2022
Federal [Member]	'
Operating Loss Carryforwards [Line Items]	'
Net Operating Losses	136,057
Operating loss carryforwards expiration, start	'2020
Operating loss carryforwards expiration, end	'2033
State and Local Jurisdiction [Member]	'
Operating Loss Carryforwards [Line Items]	'
Net Operating Losses	129,453
Alabama [Member] \| State and Local Jurisdiction [Member]	'
Operating Loss Carryforwards [Line Items]	'
Net Operating Losses	749
Operating loss carryforwards expiration, start	'2014
Operating loss carryforwards expiration, end	'2029
California [Member] \| State and Local Jurisdiction [Member]	'
Operating Loss Carryforwards [Line Items]	'
Net Operating Losses	12,845
Operating loss carryforwards expiration, start	'2015
Operating loss carryforwards expiration, end	'2031
Colorado [Member] \| State and Local Jurisdiction [Member]	'
Operating Loss Carryforwards [Line Items]	'
Net Operating Losses	3,363
Operating loss carryforwards expiration, start	'2027
Operating loss carryforwards expiration, end	'2034
Georgia [Member] \| State and Local Jurisdiction [Member]	'
Operating Loss Carryforwards [Line Items]	'
Net Operating Losses	567
Operating loss carryforwards expiration, start	'2021
Operating loss carryforwards expiration, end	'2029
Hawaii [Member] \| State and Local Jurisdiction [Member]	'
Operating Loss Carryforwards [Line Items]	'
Net Operating Losses	6,101
Operating loss carryforwards expiration, start	'2024
Operating loss carryforwards expiration, end	'2034
Illinois [Member] \| State and Local Jurisdiction [Member]	'
Operating Loss Carryforwards [Line Items]	'
Net Operating Losses	93,836
Operating loss carryforwards expiration, start	'2019
Operating loss carryforwards expiration, end	'2026
Louisiana [Member] \| State and Local Jurisdiction [Member]	'
Operating Loss Carryforwards [Line Items]	'
Net Operating Losses	66
Operating loss carryforwards expiration, start	'2020
Operating loss carryforwards expiration, end	'2029
Mississippi [Member] \| State and Local Jurisdiction [Member]	'
Operating Loss Carryforwards [Line Items]	'
Net Operating Losses	11,765
Operating loss carryforwards expiration, start	'2019
Operating loss carryforwards expiration, end	'2034
Virginia [Member] \| State and Local Jurisdiction [Member]	'
Operating Loss Carryforwards [Line Items]	'
Net Operating Losses	$161
Operating loss carryforwards expiration, start	'
Operating loss carryforwards expiration, end	'2034

Income_Taxes_Unrecognized_Tax_

Income Taxes - Unrecognized Tax Benefits (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of Unrecognized Tax Liability	'	'	'
Balance at beginning of year	$2,754	$2,754	$2,754
Additions based on tax positions taken during a prior period	3,479	'	'
Additions based on tax positions related to the current period	'	'	'
Reductions based on tax positions related to prior years	-1,965	'	'
Settlements with taxing authorities	'	'	'
Lapse of statutes of limitations	'	'	'
Balance at end of year	$4,268	$2,754	$2,754

Segment_Information_Additional

Segment Information - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2013
	Segment
Segment Reporting [Abstract]	'
Number of Operating segments before acquisition of Fulghum, Atikokan, Wawa and winding down of the PDU	3
Number of operating segments	5

Segment_Information_Segment_In

Segment Information - Segment Information (Detail) (USD $)

3 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Sep. 30, 2011

Segment Reporting Information [Line Items]

Total revenues

$79,273

$115,762

$120,153

$59,667

$92,460

$60,170

$70,707

$38,588

$63,066

$43,014

$374,855

$261,925

$200,115

$180,063

Total gross profit

-2,594

21,199

42,314

22,772

28,589

35,040

45,655

22,635

25,556

16,128

83,691

131,919

86,005

76,577

Total selling, general and administrative expense

10,498

7,687

59,076

48,240

30,815

28,004

Total research and development

4,202

5,426

5,747

20,944

28,785

30,009

Total depreciation and amortization

566

573

3,113

3,754

2,218

2,225

Total operating income (loss)

-15,806

-20,216

25,074

2,068

-9,286

16,604

29,448

6,578

10,214

2,389

-8,880

43,344

-27,209

-35,034

Total segment net income (loss)

-21,476

-23,578

44,306

786

-17,911

15,443

25,679

4,326

-4,098

-5,884

27,537

-63,596

-65,382

Net loss attributable to Rentech common shareholders

-14,531

-14,593

32,832

-5,240

-24,526

4,270

9,520

-3,264

-8,531

-5,518

-1,532

-14,000

-67,296

-64,283

Income from discontinued operations

134

150

Consolidated net income (loss)

-21,476

-23,578

44,306

786

-17,895

15,577

25,679

4,326

-4,098

-5,884

27,687

-63,596

-65,382

Total assets

703,590

479,202

703,590

479,202

Total assets

703,590

479,202

703,590

479,202

Reportable Segments [Member]

Segment Reporting Information [Line Items]

Total gross profit

25,556

16,128

83,691

131,919

76,577

Total selling, general and administrative expense

10,498

7,687

26,282

13,036

28,004

Total depreciation and amortization recorded in operating expenses

566

573

2,517

2,963

2,225

Total research and development

4,202

5,426

5,747

20,944

30,009

Total depreciation and amortization expense recorded in cost of sales

3,210

2,489

18,071

11,070

9,611

Total depreciation and amortization

3,776

3,062

20,588

14,033

11,836

Total other operating expenses

24,635

15,636

51,373

Total operating income (loss)

10,214

2,389

24,510

79,340

-35,034

Total interest (income) expense

4,098

3,730

1,760

-1,382

16,666

Total segment net income (loss)

-4,098

-5,884

21,783

78,656

-65,382

Net loss attributable to Rentech common shareholders

-4,098

-5,884

21,783

78,656

-65,382

Income (expenses) recorded as other income (expense)

-7,945

-11,773

Segment Reconciling Items [Member]

Segment Reporting Information [Line Items]

Total assets

600,887

326,634

600,887

326,634

Total assets

600,887

326,634

600,887

326,634

Rnp Partnership and other [Member]

Segment Reporting Information [Line Items]

Total assets

42,078

60,266

42,078

60,266

Total assets

42,078

60,266

42,078

60,266

Corporate and Unallocated Expenses Recorded as Selling, General and Administrative Expenses [Member]

Segment Reporting Information [Line Items]

Total assets

60,625

92,302

60,625

92,302

Total assets

60,625

92,302

60,625

92,302

East Dubuque [Member] | Reportable Segments [Member]

Segment Reporting Information [Line Items]

Total revenues

63,014

42,962

177,700

224,205

179,857

Total gross profit

25,554

16,127

80,883

133,543

76,571

Total selling, general and administrative expense

3,336

1,431

4,576

6,242

5,786

Total depreciation and amortization recorded in operating expenses

112

191

807

409

Total depreciation and amortization expense recorded in cost of sales

3,210

2,489

9,048

10,690

9,611

Total other operating expenses

-507

806

510

522

Total operating income (loss)

22,648

14,584

75,310

125,984

69,854

Total interest (income) expense

1,947

2,912

194

13,752

Total segment net income (loss)

10,455

7,096

75,244

123,721

42,341

Total assets

175,430

125,100

175,430

125,100

Total assets

175,430

125,100

175,430

125,100

Pasadena [Member] | Reportable Segments [Member]

Segment Reporting Information [Line Items]

Total revenues

133,675

37,430

Total gross profit

-9,529

-1,704

Total selling, general and administrative expense

4,764

361

Total depreciation and amortization recorded in operating expenses

3,886

583

Total depreciation and amortization expense recorded in cost of sales

4,187

380

Total other operating expenses

30,029

Total operating income (loss)

-48,208

-2,648

Total interest (income) expense

Total segment net income (loss)

-48,357

-2,648

Total assets

188,836

191,279

188,836

191,279

Total assets

188,836

191,279

188,836

191,279

Fulghum Fibers [Member] | Reportable Segments [Member]

Segment Reporting Information [Line Items]

Total revenues

62,974

Total gross profit

12,032

Total selling, general and administrative expense

3,754

Total depreciation and amortization recorded in operating expenses

-1,708

Total depreciation and amortization expense recorded in cost of sales

4,836

Total other operating expenses

Total operating income (loss)

9,914

Total interest (income) expense

1,755

Total segment net income (loss)

6,967

Total assets

188,397

Total assets

188,397

Wood Pellets [Member] | Reportable Segments [Member]

Segment Reporting Information [Line Items]

Total selling, general and administrative expense

5,479

1,919

Total depreciation and amortization recorded in operating expenses

Total operating income (loss)

-5,505

-1,919

Total segment net income (loss)

-5,180

-1,919

Total assets

42,089

Total assets

42,089

Energy Technologies [Member] | Reportable Segments [Member]

Segment Reporting Information [Line Items]

Total revenues

506

290

206

Total gross profit

305

Total selling, general and administrative expense

7,162

6,256

7,709

4,514

22,218

Total depreciation and amortization recorded in operating expenses

489

461

122

1,573

1,816

Total research and development

4,202

5,426

5,747

20,944

30,009

Total other operating expenses

583

-6,272

15,126

50,851

Total operating income (loss)

-12,434

-12,195

-7,001

-42,077

-104,888

Total interest (income) expense

2,151

818

-3

-1,576

2,914

Total segment net income (loss)

-14,553

-12,980

-6,891

-40,498

-107,723

Total assets

6,135

10,197

6,135

10,197

Total assets

6,135

10,197

6,135

10,197

RNP - Partnership and Unallocated Expenses Recorded as Other Income (Expense) [Member] | Reportable Segments [Member]

Segment Reporting Information [Line Items]

Income (expenses) recorded as other income (expense)

-1,081

232

RNP - Unallocated Interest Expense and Loss on Interest Rate Swaps [Member]

Segment Reporting Information [Line Items]

Income (expenses) recorded as other income (expense)

-14,096

-2,226

RNP - Unallocated Interest Expense and Loss on Interest Rate Swaps [Member] | Parent Company [Member]

Segment Reporting Information [Line Items]

Income (expenses) recorded as other income (expense)

-532

-9,055

RNP - Income Tax Benefit (Expense) [Member]

Segment Reporting Information [Line Items]

Income (expenses) recorded as other income (expense)

303

-303

RNP - Income Tax Benefit (Expense) [Member] | Parent Company [Member]

Segment Reporting Information [Line Items]

Income (expenses) recorded as other income (expense)

27,032

-1,063

Corporate and Unallocated Expenses Recorded as Selling, General and Administrative Expenses [Member]

Segment Reporting Information [Line Items]

Income (expenses) recorded as other income (expense)

-24,849

-23,432

Depreciation and Amortization Expenses [Member] | Parent Company [Member]

Segment Reporting Information [Line Items]

Income (expenses) recorded as other income (expense)

-596

-791

Corporate and Unallocated Income (Expense) Recorded as Other Income (Expense) [Member]

Segment Reporting Information [Line Items]

Income (expenses) recorded as other income (expense)

$19

($2,708)

Segment_Information_Summary_of

Segment Information - Summary of Revenue by Geographic Area (Detail) (USD $)

3 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Sep. 30, 2011

Segment Reporting Information [Line Items]

Total revenues

$79,273

$115,762

$120,153

$59,667

$92,460

$60,170

$70,707

$38,588

$63,066

$43,014

$374,855

$261,925

$200,115

$180,063

United States [Member]

Segment Reporting Information [Line Items]

Total revenues

352,514

261,925

Other [Member]

Segment Reporting Information [Line Items]

Total revenues

$22,341

Segment_Information_Summary_of1

Segment Information - Summary of Assets by Geographic Area (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]	'	'
Total assets	$703,590	$479,202
United States [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Total assets	633,886	479,202
Other [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Total assets	$69,704	'

Net_Income_Loss_Per_Common_Sha1

Net Income (Loss) Per Common Share Attributable to Rentech - Additional Information (Detail)	3 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2011
Earnings Per Share [Abstract]	'	'	'	'	'
Anti-dilutive common stock	41.3	40.8	16.1	16.7	40.5

Selected_Quarterly_Financial_D2

Selected Quarterly Financial Data (Unaudited) - Selected Unaudited Condensed Consolidated Financial Information (Detail) (USD $)	3 Months Ended										12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2011
Quarterly Financial Data [Abstract]	'	'	'	'	'	'	'	'	'	'	'	'	'	'
Revenues	$79,273	$115,762	$120,153	$59,667	$92,460	$60,170	$70,707	$38,588	$63,066	$43,014	$374,855	$261,925	$200,115	$180,063
Gross profit (loss)	-2,594	21,199	42,314	22,772	28,589	35,040	45,655	22,635	25,556	16,128	83,691	131,919	86,005	76,577
Operating income (loss)	-15,806	-20,216	25,074	2,068	-9,286	16,604	29,448	6,578	10,214	2,389	-8,880	43,344	-27,209	-35,034
Income (loss) from continuing operations	-21,476	-23,578	44,306	786	-17,911	15,443	25,679	4,326	-4,098	-5,884	38	27,537	-63,596	-65,382
Income from discontinued operations, net of tax	'	'	'	'	16	134	'	'	'	'	'	150	'	'
Net income (loss)	-21,476	-23,578	44,306	786	-17,895	15,577	25,679	4,326	-4,098	-5,884	38	27,687	-63,596	-65,382
Net (income) loss attributable to noncontrolling interests	6,945	8,985	-11,474	-6,026	-6,631	-11,307	-16,159	-7,590	-4,433	366	-1,570	-41,687	-3,700	1,099
Net income (loss) attributable to Rentech	($14,531)	($14,593)	$32,832	($5,240)	($24,526)	$4,270	$9,520	($3,264)	($8,531)	($5,518)	($1,532)	($14,000)	($67,296)	($64,283)
Basic and diluted:	'	'	'	'	'	'	'	'	'	'	'	'	'	'
Continuing operations	($0.06)	($0.06)	$0.14	($0.02)	($0.11)	$0.02	$0.04	($0.01)	'	'	'	'	'	'
Discontinued operations	$0	$0	$0	$0	$0	$0	$0	$0	'	'	'	'	'	'
Net income (loss)	($0.06)	($0.06)	$0.14	($0.02)	($0.11)	$0.02	$0.04	($0.01)	($0.04)	($0.02)	($0.01)	($0.06)	($0.30)	($0.29)

Selected_Quarterly_Financial_D3

Selected Quarterly Financial Data (Unaudited) - Additional Information (Detail) (USD $)	12 Months Ended	1 Months Ended	3 Months Ended
	Dec. 31, 2013	Nov. 30, 2013	Dec. 31, 2013	Dec. 31, 2013
	Dec. 31, 2013	East Dubuque [Member]	East Dubuque [Member]	Pasadena [Member]
Interim Reporting [Line Items]	'	'	'	'
Turnaround expenses	'	'	$7,800,000	$1,700,000
Write-down of inventory	12,360,000	'	'	5,100,000
Fixed operating cost during idle time	'	'	4,200,000	'
Insurance deductible for the fire	'	$1,000,000	'	'

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2013	Mar. 07, 2014	Feb. 13, 2014	Mar. 31, 2014	Feb. 13, 2014	Feb. 13, 2014
		2013 RNP Credit Agreement [Member]	Subsequent Event [Member]	Subsequent Event [Member]	Subsequent Event [Member]	Subsequent Event [Member]	Subsequent Event [Member]
			2013 RNP Credit Agreement [Member]	2013 RNP Credit Agreement [Member]	Alternative Energy Technologies and Decommissioned PDU [Member]	RNP [Member]	RNP [Member]
							RNHI [Member]
Subsequent Event [Line Items]	'	'	'	'	'	'	'
Cash distribution declared to RNP's common unitholders, per unit	'	'	'	'	'	$0.05	'
Cash distribution declared to RNP's common unitholders	'	'	'	'	'	$2,000,000	$1,200,000
Cash distribution declaration date	'	'	'	'	'	13-Feb-14	'
Cash distribution date to be paid	'	'	'	'	'	28-Feb-14	'
Cash distribution date of record	'	'	'	'	'	24-Feb-14	'
Fixed charge coverage ratio after first amendment	'	'	2	'	'	'	'
Fixed charge coverage ratio end date	'	'	2.25	'	'	'	'
Fixed charge coverage ratio	'	3.27	'	'	'	'	'
outstanding advances under RNP Credit facility	193,290,000	0	'	0	'	'	'
Secured leverage ratio not in excess of	'	'	3.75	'	'	'	'
Minimum borrowing capacity to be maintained before making distributions	'	'	8,750,000	'	'	'	'
Maximum secured leverage ratio following end date	'	'	3.75	'	'	'	'
Initial cash purchase price of assets sold	'	'	'	'	15,300,000	'	'
Probable cash purchase price of assets sold	'	'	'	'	$16,200,000	'	'

Schedule_II_Valuation_and_Qual1

Schedule II - Valuation and Qualifying Accounts (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2011
Deferred Tax Valuation Account [Member]	'	'	'	'
Valuation and Qualifying Accounts Disclosure [Line Items]	'	'	'	'
Valuation Allowances and Reserves, Beginning Balance	$126,831	$39,128	$32,018	$100,144
Valuation Allowances and Reserves, Charged to Expense	'	'	'	26,687
Valuation Allowances and Reserves, Deductions and Write-Offs	94,813	-10,424	7,110	'
Valuation Allowances and Reserves, Balance, Ending Balance	32,018	28,704	39,128	126,831
Allowance for Doubtful Accounts [Member]	'	'	'	'
Valuation and Qualifying Accounts Disclosure [Line Items]	'	'	'	'
Valuation Allowances and Reserves, Beginning Balance	100	'	100	100
Valuation Allowances and Reserves, Charged to Expense	'	'	'	'
Valuation Allowances and Reserves, Deductions and Write-Offs	'	'	-100	'
Valuation Allowances and Reserves, Balance, Ending Balance	100	'	'	100
Reserve for REN earn-out [Member]	'	'	'	'
Valuation and Qualifying Accounts Disclosure [Line Items]	'	'	'	'
Valuation Allowances and Reserves, Beginning Balance	697	'	697	697
Valuation Allowances and Reserves, Charged to Expense	'	'	'	'
Valuation Allowances and Reserves, Deductions and Write-Offs	'	'	-697	'
Valuation Allowances and Reserves, Balance, Ending Balance	$697	'	'	$697