Bison Merger Sub I (FMSA) 10-Q 3 Nov 16 2016 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Oct. 31, 2016
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
Trading Symbol	FMSA
Entity Registrant Name	Fairmount Santrol Holdings Inc.
Entity Central Index Key	1,010,858
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		222,766,186

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income (Loss) (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Revenues	$ 134,775	$ 170,950	$ 394,482	$ 693,763
Cost of goods sold (excluding depreciation, depletion, amortization, and stock compensation expense shown separately)	114,873	131,679	347,466	499,357
Gross margin	19,902	39,271	47,016	194,406
Operating expenses
Selling, general and administrative expenses	15,443	18,314	53,194	61,538
Depreciation, depletion and amortization expense	17,759	15,260	54,401	47,759
Stock compensation expense	1,799	2,679	7,366	7,180
Asset impairments	0	4,169	90,654	10,644
Restructuring charges		284	1,155	8,957
Other operating expense (income)	9,362	(878)	9,266	(278)
Income (loss) from operations	(24,461)	(557)	(169,020)	58,606
Interest expense, net	16,175	15,963	50,043	46,165
Other non-operating expense (income)		1,492	(5)	1,492
Income (loss) before provision for income taxes	(40,636)	(18,012)	(219,058)	10,949
Provision (benefit) for income taxes	(20,013)	28,117	(98,786)	12,057
Net loss	(20,623)	(46,129)	(120,272)	(1,108)
Less: Net income attributable to the non-controlling interest	2	71	15	196
Net loss attributable to Fairmount Santrol Holdings Inc.	$ (20,625)	$ (46,200)	$ (120,287)	$ (1,304)
Loss per share
Basic	$ (0.11)	$ (0.29)	$ (0.71)	$ (0.01)
Diluted	$ (0.11)	$ (0.29)	$ (0.71)	$ (0.01)
Weighted average number of shares outstanding
Basic	183,620	161,413	168,904	161,241
Diluted	183,620	161,413	168,904	161,241

Condensed Consolidated Stateme3

Condensed Consolidated Statements of Comprehensive Income (Loss) (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net loss	$ (20,623)	$ (46,129)	$ (120,272)	$ (1,108)
Other comprehensive income (loss), before tax
Foreign currency translation adjustment	(2)	(1,488)	(362)	(4,841)
Pension obligations	66	74	174	222
Change in fair value of derivative agreements	893	(3,248)	(7,321)	(7,309)
Total other comprehensive income (loss), before tax	957	(4,662)	(7,509)	(11,928)
Benefit from income taxes related to items of other comprehensive income (loss)	(66)	(1,235)	(3,226)	(2,560)
Comprehensive loss, net of tax	(19,600)	(49,556)	(124,555)	(10,476)
Comprehensive income attributable to the non-controlling interest	2	71	15	196
Comprehensive loss attributable to Fairmount Santrol Holdings Inc.	$ (19,602)	$ (49,627)	$ (124,570)	$ (10,672)

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 213,434	$ 171,486
Accounts receivable, net of allowance for doubtful accounts of $3,966 and $2,470 at September 30, 2016 and December 31, 2015, respectively	78,798	73,566
Inventories	53,154	70,494
Prepaid expenses and other assets	9,259	13,404
Refundable income taxes	20,584	26,506
Current assets classified as held-for-sale (includes cash, accounts receivable, inventories, and property, plant, and equipment)		4,218
Total current assets	375,229	359,674
Property, plant and equipment, net	743,999	870,997
Deferred income taxes	834	834
Goodwill	15,301	15,301
Intangibles, net	94,386	96,482
Other assets	9,265	10,961
Total assets	1,239,014	1,354,249
Current liabilities
Current portion of long-term debt	30,394	17,385
Accounts payable	36,579	40,421
Accrued expenses	24,227	26,785
Current liabilities directly related to current assets classified as held-for-sale (includes accounts payable and accrued expenses)		934
Total current liabilities	91,200	85,525
Long-term debt	1,113,688	1,205,721
Deferred income taxes	6,701	89,569
Other long-term liabilities	40,772	33,802
Total liabilities	1,252,361	1,414,617
Commitments and contingent liabilities (Note 12)
Preferred stock: $0.01 par value, 100,000 authorized shares Shares outstanding: 0 at September 30, 2016 and December 31, 2015
Common stock: $0.01 par value, 1,850,000 authorized shares Shares outstanding: 191,947 and 161,433 at September 30, 2016 and December 31, 2015, respectively	2,408	2,391
Additional paid-in capital	494,278	776,705
Retained earnings	284,757	405,044
Accumulated other comprehensive loss	(21,976)	(17,693)
Total equity attributable to Fairmount Santrol Holdings Inc. before treasury stock	759,467	1,166,447
Less: Treasury stock at cost Shares in treasury: 48,916 and 77,765 at September 30, 2016 and December 31, 2015, respectively	(773,126)	(1,227,663)
Total equity (deficit) attributable to Fairmount Santrol Holdings Inc.	(13,659)	(61,216)
Non-controlling interest	312	848
Total equity (deficit)	(13,347)	(60,368)
Total liabilities and equity	$ 1,239,014	$ 1,354,249

Condensed Consolidated Balance5

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 3,966	$ 2,470
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	1,850,000,000	1,850,000,000
Common stock, shares outstanding	191,947,000	161,433,000
Shares in treasury	48,916,000	77,765,000

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Subtotal [Member]	Non-controlling Interest [Member]
Beginning balances at Dec. 31, 2014	$ 33,474	$ 2,387	$ 771,888	$ 497,179	$ (12,809)	$ (1,227,663)	$ 30,982	$ 2,492
Beginning balances, shares at Dec. 31, 2014		160,913				77,765
Stock options exercised	1,767	$ 4	1,763				1,767
Stock options exercised, shares		520
Stock compensation expense	7,180		7,180				7,180
Tax effect of stock options exercised	32		32				32
Transactions with non-controlling interest	(1,592)							(1,592)
Net income (loss)	(1,108)			(1,304)			(1,304)	196
Other comprehensive loss	(9,368)				(9,368)		(9,368)
Ending balances at Sep. 30, 2015	30,385	$ 2,391	780,863	495,875	(22,177)	$ (1,227,663)	29,289	1,096
Ending balances, shares at Sep. 30, 2015		161,433				77,765
Beginning balances at Dec. 31, 2015	(60,368)	$ 2,391	776,705	405,044	(17,693)	$ (1,227,663)	(61,216)	848
Beginning balances, shares at Dec. 31, 2015		161,433				77,765
Re-issuance of treasury stock	161,862		(292,675)			$ 454,537	161,862
Re-issuance of treasury stock, shares						(28,750)
Stock options exercised	$ 3,950	$ 17	3,933				3,950
Stock options exercised, shares	1,729	30,514				(99)
Stock compensation expense	$ 7,366		7,366				7,366
Tax effect of stock options exercised, forfeited, or expired	(1,051)		(1,051)				(1,051)
Transactions with non-controlling interest	(551)							(551)
Net income (loss)	(120,272)			(120,287)			(120,287)	15
Other comprehensive loss	(4,283)				(4,283)		(4,283)
Ending balances at Sep. 30, 2016	$ (13,347)	$ 2,408	$ 494,278	$ 284,757	$ (21,976)	$ (773,126)	$ (13,659)	$ 312
Ending balances, shares at Sep. 30, 2016		191,947				48,916

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Statement of Cash Flows [Abstract]
Net loss	$ (120,272)	$ (1,108)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and depletion	50,891	44,355
Amortization	8,471	8,586
Reserve for doubtful accounts	2,645
Write-off of deferred financing costs		864
Asset impairments	90,654	6,967
Non-cash restructuring charges		1,162
Inventory write-downs and reserves	10,302	(83)
Loss on sale of fixed assets	315	424
Unrealized loss on interest rate swaps		48
Deferred income taxes and taxes payable	(80,248)	4,417
Refundable income taxes	5,922	(9,997)
Stock compensation expense	7,366	7,180
Change in operating assets and liabilities:
Accounts receivable	(5,035)	114,818
Inventories	7,039	54,764
Prepaid expenses and other assets	1,873	21,738
Accounts payable	4,723	(37,028)
Accrued expenses	225	20
Net cash provided by (used in) operating activities	(15,129)	217,127
Cash flows from investing activities
Proceeds from sale of fixed assets	5,630
Capital expenditures and stripping costs	(28,712)	(91,548)
Other investing activities	(1,631)
Net cash used in investing activities	(24,713)	(91,548)
Cash flows from financing activities
Payments on long-term debt	(78,250)	(10,595)
Payments on capital leases and other long-term debt	(5,067)	(5,522)
Proceeds from option exercises	3,950	1,767
Proceeds from primary stock offering	161,862
Tax effect of stock options exercised, forfeited, or expired	(1,051)	32
Distributions to non-controlling interest	(551)	(219)
Other financing activities		(4,592)
Net cash provided by (used in) financing activities	80,893	(19,129)
Change in cash and cash equivalents related to assets classified as held-for-sale	1,376	(3,120)
Foreign currency adjustment	(479)	(773)
Increase in cash and cash equivalents	41,948	102,557
Cash and cash equivalents:
Beginning of period	171,486	76,923
End of period	$ 213,434	$ 179,480

Significant Accounting Policies

Significant Accounting Policies	9 Months Ended
	Sep. 30, 2016
Accounting Policies [Abstract]
Significant Accounting Policies	1. Significant Accounting Policies Basis of Presentation The unaudited condensed consolidated financial statements of Fairmount Santrol Holdings Inc. and its consolidated subsidiaries (collectively, the “Company”) have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. In the opinion of management, the unaudited condensed consolidated financial statements reflect all adjustments (which are of a normal, recurring nature) and disclosures necessary for a fair statement of the financial position, results of operations, comprehensive income, and cash flows of the reported interim periods. The condensed consolidated balance sheet as of December 31, 2015 was derived from audited financial statements, but does not include all disclosures required by GAAP. Interim results are not necessarily indicative of the results to be expected for the full year or any other interim period. These unaudited condensed consolidated financial statements should be read in conjunction with the Company’s consolidated financial statements as filed in the 2015 Annual Report on Form 10-K and notes thereto and information included elsewhere in this Quarterly Report on Form 10-Q. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. Change in Classification In the three months ended June 30, 2016, the Company changed the classification of certain operating expenses on the Condensed Consolidated Statements of Income (Loss). Previously, the Company classified expenses incurred related to the downturn in the proppant market as “restructuring and other charges.” The Company now further classifies these types of expenses between asset impairments and restructuring charges. All periods presented have been restated accordingly. See Note 15 for further detail. Recent Accounting Pronouncements In April 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2015-03 – Interest – Imputation of Interest In February 2016, the FASB issued ASU No. 2016-02 – Leases Leases In March 2016, the FASB issued ASU No. 2016-09 – Compensation – Stock Compensation In April and May 2016, the FASB issued ASU No. 2016-10 – Revenue from Contracts with Customers – Identifying Performance Obligations and Licensing Revenue Recognition and Derivatives and Hedging – Recession of SEC Guidance Revenue from Contracts with Customers – Narrow-Scope Improvements and Practical Expedients – Revenue from Contracts with Customers In August 2016, the FASB issued ASU No. 2016-15 – Statement of Cash Flows – Classifications of Certain Cash Receipts and Cash Payments

Inventories

Inventories	9 Months Ended
	Sep. 30, 2016
Inventory Disclosure [Abstract]
Inventories	2. Inventories At September 30, 2016 and December 31, 2015, inventories consisted of the following: September 30, 2016 December 31, 2015 Raw materials $ 6,721 $ 10,145 Work-in-process 12,262 14,613 Finished goods 36,767 48,648 55,750 73,406 Less: LIFO reserve (2,596 ) (2,912 ) Inventories $ 53,154 $ 70,494

Property, Plant, and Equipment

Property, Plant, and Equipment	9 Months Ended
	Sep. 30, 2016
Property, Plant and Equipment [Abstract]
Property, Plant, and Equipment	3. Property, Plant, and Equipment At September 30, 2016 and December 31, 2015, property, plant, and equipment consisted of the following: September 30, 2016 December 31, 2015 Land and improvements $ 85,289 $ 82,966 Mineral reserves and mine development 249,714 323,691 Machinery and equipment 577,240 575,034 Buildings and improvements 153,615 171,791 Furniture, fixtures, and other 3,450 3,609 Construction in progress 38,059 37,047 1,107,367 1,194,138 Accumulated depletion and depreciation (363,368 ) (323,141 ) Property, plant, and equipment, net $ 743,999 $ 870,997 Under ASC 360 Property, Plant, and Equipment If the ongoing uncertainty in oil and gas markets continues, it is possible that additional assets, both tangible and intangible, could be subject to additional impairment losses in future periods.

Long-Term Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Long-Term Debt	4. Long-Term Debt At September 30, 2016 and December 31, 2015, long-term debt consisted of the following: September 30, 2016 December 31, 2015 Term B-1 Loans $ 16,754 $ 156,134 Term B-2 Loans 896,029 902,402 Extended Term B-1 Loans 158,716 159,878 2016 Extended Term Loans 69,502 — Industrial Revenue bond 10,000 10,000 Revolving credit facility and other 88 101 Capital leases, net 4,514 9,301 Deferred financing costs, net (11,521 ) (14,710 ) 1,144,082 1,223,106 Less: current portion (30,394 ) (17,385 ) Long-term debt including leases $ 1,113,688 $ 1,205,721 As detailed in “Recent Accounting Pronouncements” in Note 1, ASU 2015-03 dictates that debt issuance costs related to a recognized debt liability are presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The “Deferred financing costs, net” line in the table above is the application of this new guidance. On September 5, 2013, the Company entered into the Second Amended and Restated Credit Agreement (the “2013 Amended Credit Agreement”). The 2013 Amended Credit Agreement initially contained a revolving credit facility (“Revolving Credit Facility”) and two tranches of term loans, a term B-1 facility (“Term B-1 Loans”) and a term B-2 facility (“Term B-2 Loans”). The Revolving Credit Facility, the Term B-1 Loans, and the Term B-2 Loans are secured by a first priority lien on substantially all of the Company’s domestic assets. The 2013 Amended Credit Agreement was amended in March 2014, April 2015, and May 2015 as well as joinder agreements as of August 2014 and September 2014. These amendments and joinder agreements made various changes to maturity dates and interest rate margins. In addition, amounts that were initially Term B-1 Loans and balances on the Revolving Credit Facility were converted into term loans with essentially the same terms as the Term B-2 Loans (the “Extended Term B-1 Loans”). The applicable margin for B-1 and B-2 Base Rate loans was 2.5% and the margin on B-1 and B-2 Eurodollar Rate loans was 3.5%. On September 30, 2015, the Company entered into an amendment to the 2013 Amended Credit Agreement that modified the Revolving Credit Facility. These modifications consisted primarily of (i) a reduction in the U.S. revolving commitments from $124,000 to $99,000 (while the aggregate Canadian revolving commitment remained at $1,000) and (ii) changes in the financial covenant governing the availability of amounts under the Revolving Credit Facility if, and only if, the Company has drawn, including letters of credit, more than $31,250 on the Revolving Credit Facility. Generally, if the Company’s leverage ratio is greater than 4.75:1.00 during the period from the third quarter of 2015 through the fourth quarter of 2016, so long as the stated quarterly adjusted EBITDA thresholds are exceeded, the amount available to borrow under the Revolving Credit Facility is increased from $31,250 to $40,000. Commencing with the end of the first quarter of 2017, the quarterly adjusted EBITDA thresholds are discontinued and the full amount of the revolving commitment ($100,000) is available so long as the Company’s leverage ratio does not exceed a revised limit (6.50:1.00 for the first quarter of 2017 declining quarterly to 4.75:1.00 for the fourth quarter of 2017). As of September 30, 2016, the Company’s leverage ratio was 96.0:1.00. On April 28, 2016, the Company entered into an amendment to the 2013 Amended Credit Agreement that extended the maturity of certain of the Term B-1 Loans to July 15, 2018 (the “2016 Extended Term Loans”). The Company made a prepayment of accrued interest of $227 and principal of $69,580 on April 28, 2016 to the lenders consenting to the amendment. Accrued interest on the extended remainder of the Term B-1 Loan is due at maturity on July 15, 2018. Under the terms of the agreement, the change in the maturities of the Term B-1 Loans and the 2016 Extended Term Loans are as follows: Principal Payments Due Date Prior to Extension Subsequent to Extension 4/28/2016 (A) $ — $ 69,580 6/30/2016 400 43 9/30/2016 400 43 12/31/2016 400 43 3/17/2017 154,812 16,723 7/15/2018 — 69,580 Total (B) $ 156,012 $ 156,012 (A) - The principal payment shown for April 28, 2016 represents a prepayment of principal to the lenders consenting to the extended maturity. (B) - These amounts do not reflect the amortization of original issue discounts. Accrued interest related to the $16,723 principal payment due on March 17, 2017 will also be due on the same date, as shown above. The applicable base rate margin on the interest rate for the Base Rate Term B-1 Loans, the Extended Term B-1 Loans, the 2016 Extended Term Loans, and the Term B-2 Loans is 2.5% and the applicable margin on the interest rate for the Eurodollar Term B-1, Extended Term B-1, 2016 Extended Term Loans, and the Term B-2 Loans is 3.5%. The Eurodollar Extended Term B-1, 2016 Extended Term, and Term B-2 Loans all contain a 1% rate floor, plus the applicable margin. The Term B-1 Loan does not contain any type of interest rate floor. As of September 30, 2016, Term B-1 Loans, Term B-2 Loans, Extended Term B-1 Loans, the 2016 Extended Term Loans, and the Revolving Credit Facility had interest rates of 4.4%, 4.5%, 4.5%, 4.5%, and 4.3%, respectively. As of September 30, 2016, there was $17,432 available unused capacity on the Revolving Credit Facility and $13,818 committed to outstanding letters of credit. As of September 30, 2016, the Company has not drawn on the Revolving Credit Facility. The Company has a $10,000 Industrial Revenue Bond outstanding related to the construction of a manufacturing facility in Wisconsin. The bond bears interest, which is payable monthly, at a variable rate. The rate was 0.91% at September 30, 2016. The bond matures on September 1, 2027 and is collateralized by a letter of credit of $10,000. On October 17, 2016, subsequent to the end of the third quarter, the Company re-purchased $3,000 of the Extended Term B-1 Loans at 91.5% of par. The related gain on this debt re-purchase will be recognized in the three months ended December 31, 2016.

Earnings (Loss) per Share

Earnings (Loss) per Share	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Earnings (Loss) per Share	5. Earnings (Loss) per Share The table below shows the computation of basic and diluted earnings (loss) per share for the three and nine months ended September 30, 2016 and 2015: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Numerator: Net loss attributable to Fairmount Santrol Holdings Inc. $ (20,625 ) $ (46,200 ) $ (120,287 ) $ (1,304 ) Denominator: Basic weighted average shares outstanding 183,620 161,413 168,904 161,241 Dilutive effect of employee stock options, RSUs, and PRSUs — — — — Diluted weighted average shares outstanding 183,620 161,413 168,904 161,241 Loss per common share - basic $ (0.11 ) $ (0.29 ) $ (0.71 ) $ (0.01 ) Loss per common share - diluted $ (0.11 ) $ (0.29 ) $ (0.71 ) $ (0.01 ) Because the Company incurred a loss in the three and nine months ended September 30, 2016 and 2015, respectively, the impact of dilution has not been included in the earnings per share calculation as the effect of including these potential common shares would be antidilutive.

Derivative Instruments

Derivative Instruments	9 Months Ended
	Sep. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	6. Derivative Instruments The Company enters into interest rate swap agreements as a means to partially hedge its variable interest rate risk on debt instruments. The current notional value of these swap agreements is $525,225, which represents a total of approximately 46% of term debt outstanding at September 30, 2016 and effectively fixes the variable rate in a range of 0.83% to 3.115% for the portion of the debt that is hedged. The interest rate swap agreements mature at various dates between March 15, 2017 and September 5, 2019. The derivative instruments are recorded on the balance sheet at their fair values. Changes in the fair value of derivatives are recorded each period in current earnings or in other comprehensive income, depending on whether a derivative is designated as part of a hedging relationship and, if it is, depending on the type of hedging relationship. For cash flow hedges in which the Company is hedging the variability of cash flows related to a variable-rate liability, the effective portion of the gain or loss on the derivative instrument is reported in other comprehensive income in the periods during which earnings are impacted by the variability of the cash flows of the hedged item. The ineffective portion of all hedges is recognized in current period earnings. As interest expense is accrued on the debt obligation, amounts in accumulated other comprehensive income (loss) related to the interest rate swaps are reclassified into income to obtain a net cost on the debt obligation equal to the effective yield of the fixed rate of each swap. In the event that an interest rate swap is terminated prior to maturity, gains or losses in accumulated other comprehensive income (loss) remain deferred and are reclassified into earnings in the periods in which the hedged forecasted transaction affects earnings. The Company formally designates and documents instruments at inception that qualify for hedge accounting of underlying exposures in accordance with GAAP. Both at inception and for each reporting period, the Company assesses whether the financial instruments used in hedging transactions are effective in offsetting changes in cash flows of the related underlying exposure. The following table summarizes the fair values and the respective classification in the Condensed Consolidated Balance Sheets as of September 30, 2016 and December 31, 2015: Assets (Liabilities) Interest Rate Swap Agreements Balance Sheet Classification September 30, 2016 December 31, 2015 Designated as hedges Other long-term liabilities $ (18,972 ) $ (12,107 ) Designated as hedges Other assets 22 118 $ (18,950 ) $ (11,989 ) In order to represent the ineffective portion of interest rate swap agreements designated as hedges, the Company recognized in interest expense the following in the three and nine months ended September 30, 2016 and 2015: Derivatives in ASC 815-20 Cash Flow Hedging Relationships Location of Gain (Loss) Recognized in Income on Derivative (Ineffective Portion) Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Interest rate swap agreements Interest expense (income) $ (153 ) $ 14 $ 46 $ 30 $ (153 ) $ 14 $ 46 $ 30 The Company expects $6,982 to be reclassified from accumulated other comprehensive income (loss) into interest expense within the next twelve months.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements	7. Fair Value Measurements Financial instruments held by the Company include cash equivalents, accounts receivable, accounts payable, long-term debt (including the current portion thereof) and interest rate swaps. The Company is also liable for contingent consideration from an acquisition that is subject to fair value measurement. Fair value is defined as the price that would be received to sell an asset, or paid to transfer a liability, in an orderly transaction between market participants at the measurement date. In determining fair value, the Company utilizes certain assumptions that market participants would use in pricing the asset or liability, including assumptions about risk and/or the risks inherent in the inputs to the valuation technique. Based on the examination of the inputs used in the valuation techniques, the Company is required to provide the following information according to the fair value hierarchy. The fair value hierarchy ranks the quality and reliability of the information used to determine fair values. Financial assets and liabilities at fair value will be classified and disclosed in one of the following three categories: Level 1 Quoted market prices in active markets for identical assets or liabilities Level 2 Observable market based inputs or unobservable inputs that are corroborated by market data Level 3 Unobservable inputs that are not corroborated by market data A financial instrument’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The book value of cash equivalents, accounts receivable and accounts payable are considered to be representative of their fair values because of their short maturities. The carrying value of the Company’s long-term debt (including the current portion thereof) is recognized at amortized cost. The fair value of the Term B-1 Loans, the Extended Term B-1 Loans, the 2016 Extended Term Loans, and the Term B-2 Loans differs from amortized costs and is valued at prices obtained from a readily-available source for trading non-public debt, which represent quoted prices for identical or similar assets in markets that are not active, and therefore is considered Level 2. The following table presents the fair value as of September 30, 2016 and December 31, 2015 for the Company’s long-term debt: Long-Term Debt Fair Value Measurements Quoted Prices Other Unobservable Total September 30, 2016 Term B-1 Loans $ — $ 16,179 $ — $ 16,179 Term B-2 Loans — 799,505 — 799,505 Extended Term B-1 Loans — 139,140 — 139,140 2016 Extended Term Loans — 66,275 — 66,275 $ — $ 1,021,099 $ — $ 1,021,099 December 31, 2015 Term B-1 Loans $ — $ 106,360 $ — $ 106,360 Term B-2 Loans — 443,580 — 443,580 Extended Term B-1 Loans — 76,922 — 76,922 $ — $ 626,862 $ — $ 626,862 The following table presents the amounts carried at fair value as of September 30, 2016 and December 31, 2015 for the Company’s other financial instruments. Recurring Fair Value Measurements Quoted Prices Other Unobservable (Level 3) Total September 30, 2016 Interest rate swap agreements $ — $ (18,950 ) $ — $ (18,950 ) $ — $ (18,950 ) $ — $ (18,950 ) December 31, 2015 Interest rate swap agreements $ — $ (11,989 ) $ — $ (11,989 ) $ — $ (11,989 ) $ — $ (11,989 )

Common Stock and Stock-Based Co

Common Stock and Stock-Based Compensation	9 Months Ended
	Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Common Stock and Stock-Based Compensation	8. Common Stock and Stock-Based Compensation The Company granted options to purchase 1,740 and 1,631 shares of common stock in the nine months ended September 30, 2016 and 2015, respectively. The average grant date fair value was $2.24 and $3.96 for options issued in the nine months ended September 30, 2016 and 2015, respectively. The Company issued restricted stock units (“RSUs”) of 1,025 and 363 in the nine months ended September 30, 2016 and 2015, respectively. The Company issued performance restricted stock units (“PRSUs”) of 481 and 0 in the nine months ended September 30, 2016 and 2015, respectively. Options Weighted Restricted Weighted Performance Weighted Outstanding at December 31, 2015 16,277 $ 6.28 579 $ 10.45 — $ — Granted 1,740 2.24 1,025 2.42 481 2.27 Exercised (1,729 ) 2.34 (14 ) 8.83 — — Forfeited (475 ) 8.53 (116 ) 6.98 (23 ) 2.04 Expired (697 ) 8.64 — — — — Outstanding at September 30, 2016 15,116 $ 6.07 1,474 $ 5.11 458 $ 2.28 In the three months ended June 30, 2016, the Company recorded approximately $2,135 of stock compensation expense related to a modification of the retirement provisions of the Company’s Long Term Incentive Plans. The modification allows retirement-eligible participants (defined as age 55, plus 10 years of service) to continue to vest in options following retirement, and also allows retired participants to exercise options for up to 10 years from grant date.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Income Taxes	9. Income Taxes The Company computes and applies to ordinary income an estimated annual effective tax rate on a quarterly basis based on current and forecasted business levels and activities, including the mix of domestic and foreign results and enacted tax laws. The estimated annual effective tax rate is updated quarterly based on actual results and updated operating forecasts. Ordinary income refers to income (loss) before income tax expense excluding significant, unusual, or infrequently occurring items. The tax effect of an unusual or infrequently occurring item is recorded in the interim period in which it occurs as a discrete item of tax. For the three months ended September 30, 2016, the Company recorded a tax benefit of $20,013 on a loss before income taxes of $40,636 resulting in an effective tax rate of 49.2%, compared to a tax expense of $28,117 on a loss before income taxes of $18,012 resulting in an effective tax rate of negative 156.1% for the same period of 2015. The increase in the effective tax rate is primarily attributable to the impact of depletion as well as a tax benefit from a loss carryback, applied against forecasted results in 2016 as compared to 2015. The effective rate differs from the U.S. federal statutory rate due primarily to the benefit from a loss carryback and depletion. For the nine months ended September 30, 2016, the Company recorded a tax benefit $98,786 on a loss before income taxes of $219,058 resulting in an effective tax rate of 45.1%, compared to a tax expense of $12,057 on income before income taxes of $10,949 resulting in an effective tax rate of 110.1% for the same period of 2015. The decrease in the effective tax rate is primarily attributable to a decrease in the impact of depletion applied against forecasted results in 2016 as compared to forecasted results in 2015. The effective rate differs from the U.S. federal statutory rate due primarily to the benefit from a loss carryback and depletion.

Defined Benefit Plans

Defined Benefit Plans	9 Months Ended
	Sep. 30, 2016
Compensation and Retirement Disclosure [Abstract]
Defined Benefit Plans	10. Defined Benefit Plans The Company maintained two defined benefit pension plans, the Wedron pension plan and the Troy Grove pension plan, covering union employees at certain facilities that provide benefits based upon years of service or a combination of employee earnings and length of service. The benefits under the Wedron plan were frozen effective December 31, 2012. Net periodic benefit cost recognized for other Company defined benefit pension plans for the three and nine months ended September 30, 2016 and 2015 is as follows: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Components of net periodic benefit cost Service cost $ 21 27 $ 63 $ 81 Interest cost 87 85 261 255 Expected return on plan assets (120 ) (127 ) (360 ) (381 ) Amortization of prior service cost — 4 — 12 Amortization of net actuarial loss 66 70 175 210 Net periodic benefit cost $ 54 $ 59 $ 139 $ 177 The Company contributed $59 and $48 during the nine months ended September 30, 2016 and 2015, respectively. Total expected employer contributions during the year ending December 31, 2016 are $76.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2016
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	11. Accumulated Other Comprehensive Income (Loss) The components of accumulated other comprehensive income (loss) attributable to Fairmount Santrol Holdings Inc. at September 30, 2016 and December 31, 2015 were as follows: September 30, 2016 Gross Tax Effect Net Amount Foreign currency translation $ (10,392 ) $ 2,012 $ (8,380 ) Additional pension liability (3,840 ) 1,464 (2,376 ) Unrealized gain (loss) on interest rate hedges (17,449 ) 6,229 (11,220 ) $ (31,681 ) $ 9,705 $ (21,976 ) December 31, 2015 Gross Tax Effect Net Amount Foreign currency translation $ (10,030 ) $ 1,318 $ (8,712 ) Additional pension liability (4,014 ) 1,464 (2,550 ) Unrealized gain (loss) on interest rate hedges (10,128 ) 3,697 (6,431 ) $ (24,172 ) $ 6,479 $ (17,693 ) The following table presents the changes in accumulated other comprehensive income by component for the nine months ended September 30, 2016: Nine Months Ended September 30, 2016 Unrealized Foreign Additional gain (loss) currency pension on interest translation liability rate hedges Total Beginning balance $ (8,712 ) $ (2,550 ) $ (6,431 ) $ (17,693 ) Other comprehensive income (loss) before reclassifications 332 — (8,015 ) (7,683 ) Amounts reclassified from accumulated other comprehensive income (loss) — 174 3,226 3,400 Ending balance $ (8,380 ) $ (2,376 ) $ (11,220 ) $ (21,976 ) The following table presents the reclassifications out of accumulated other comprehensive income during the nine months ended September 30, 2016: Amount reclassified from accumulated other comprehensive Affected line item on Details about accumulated other comprehensive income income the statement of income Change in fair value of derivative swap agreements Interest rate hedging contracts $ 4,963 Interest expense Tax effect (1,738 ) Tax expense (benefit) $ 3,225 Net of tax Amortization of pension obligations Prior service cost $ — Cost of sales Actuarial losses 175 Cost of sales 175 Total before tax Tax effect — Tax expense 175 Net of tax Total reclassifications for the period $ 3,400 Net of tax

Commitments and Contingent Liab

Commitments and Contingent Liabilities	9 Months Ended
	Sep. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	12. Commitments and Contingent Liabilities The Company has entered into numerous mineral rights agreements, in which payments under the agreements are expensed as incurred. Certain agreements require annual payments while other agreements require payments based upon annual tons mined and others a combination thereof. The Company has entered into agreements with third party terminal operators whereby certain minimum payments are due regardless of terminal utilization. The Company leases certain machinery, equipment (including railcars), buildings and office space under operating lease arrangements. Total rent expense associated with these leases was $51,130 and $50,681 for the nine months ended September 30, 2016 and 2015, respectively. The Company is subject to a contingent consideration arrangement related to the purchase of Self-Suspending Proppant LLC (“SSP”), which was accounted for as an acquisition of a group of assets. The contingent consideration is based on a fixed percentage of the cumulative product margin, less certain adjustments, generated by sales of Propel SSP and other products incorporating SSP technology for the five years commencing on October 1, 2015. The Company entered into an amendment to this agreement on December 17, 2015. This amendment (a) extends the period during which the aggregate earnout payments must equal or exceed $45,000 from the two-year period ending October 1, 2017 until the three-year period ending October 1, 2018; and (b) provides that the aggregate earnout payments during the two-year period ending October 1, 2017 must equal or exceed $15,000 and granted the Seller a security interest in 51% of the equity interests in the Company to secure such $15,000. The amendment does not alter the final threshold earnout amount, which continues to be $195,000 (inclusive of the $45,000 payment, if any) by October 1, 2020. The contingent consideration is accrued and capitalized as part of the cost of the SSP assets at the time a payment is probable and reasonably estimable. Accordingly, the Company accrued and capitalized $1,537 in the nine months ended September 30, 2016. Certain subsidiaries are defendants in lawsuits in which the alleged injuries are claimed to be silicosis-related and to have resulted, in whole or in part, from exposure to silica-containing products, allegedly including those sold by certain subsidiaries. In the majority of cases, there are numerous other defendants. In accordance with its insurance obligations, the defense of these actions has been tendered to and the cases are being defended by the subsidiaries’ insurance carriers. Management believes that the Company’s substantial level of existing and available insurance coverage combined with various open indemnities is more than sufficient to cover any exposure to silicosis-related expenses. An estimate of the possible loss, if any, cannot be made at this time. In December 2015, the Company was notified by the Securities and Exchange Commission (the “SEC”) that it was being investigated for possible violations of the Foreign Corrupt Practices Act (the “FCPA”) and other securities laws relating to matters concerning certain of the Company’s international operations. The Company had previously retained outside legal counsel to investigate the subject matter of the SEC’s investigation, and at that time, the Company determined that no further action was necessary. The Company cannot predict what, if any, further action the SEC may take regarding its investigation, and cannot provide an estimate of the potential costs of the SEC’s investigation or any possible fines, penalties, or other remedial actions that might result, if any, at this time. In the period ended September 30, 2016, the Company completed negotiations with certain railcar lessors and paid approximately $9,800 in fees that resulted in reductions to current railcar operating lease payments, in some cases in exchange for consideration including an extension of the lease terms. In addition, railcar purchase commitments due in 2017 and 2018 approximating $49,500 were cancelled and $136,500 of purchase commitments were deferred, which included $3,900 from future railcar purchase price increases. As a result of these lease modifications, beginning in October 2016, the railcar operating lease expenses recognized under the provisions of ASC 840 will differ from cash lease expense payments. The following table shows the change in future purchase commitments as a result of these negotiations: Payments Due by Period Total Less than 1 Year 1-3 Years 3-5 Years More than 5 Years Original purchase obligations $ 181,968 $ — $ 181,968 $ — $ — Purchase commitment increase (decrease) (45,512 ) — (181,968 ) 136,456 — Revised purchase commitments $ 136,456 $ — $ — $ 136,456 $ — Also as a result of these negotiations, the future minimum operating lease payments on the railcars were also modified. The other operating leases classified as equipment leases did not materially change from the levels as reported in the Company’s Annual Report on Form 10-K. The railcar operating lease expenses were decreased in 2016 and 2017 but, as a result of lease extensions, additional operating lease expense in future periods will now be recognized. The modified future minimum operating lease payments and associated changes are as follows: 2021 and Equipment lease expense 2016 2017 2018 2019 2020 Thereafter December 31, 2015 $ 57,536 $ 47,402 $ 39,610 $ 25,408 $ 13,291 $ 46,579 Future minimum lease expense increase (decrease) from railcar negotiations (2,064 ) (3,707 ) 1,349 11,897 20,189 63,901 Modified future lease expense $ 55,472 $ 43,695 $ 40,959 $ 37,305 $ 33,480 $ 110,480

Transactions with Related Parti

Transactions with Related Parties	9 Months Ended
	Sep. 30, 2016
Related Party Transactions [Abstract]
Transactions with Related Parties	13. Transactions with Related Parties The Company had purchases from an affiliated entity for freight, logistic services and consulting services related to its operations in China of $503 and $176 in the nine months ended September 30, 2016 and 2015, respectively. The Company pays American Securities LLC (“American Securities”), in accordance with its policy, for Board of Directors fees and Company-related expenses, including travel and lodging, market research, and other miscellaneous expenses. Fees and expenses paid to American Securities were $209 and $85 in the nine months ended September 30, 2016 and 2015, respectively.

Segment Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2016
Segment Reporting [Abstract]
Segment Reporting	14. Segment Reporting The Company organizes its business into two reportable segments, Proppant Solutions and Industrial & Recreational Products. The reportable segments are consistent with how management views the markets served by the Company and the financial information reviewed by the chief operating decision maker in deciding how to allocate resources and assess performance. Previously, the segment results were reported based on segment contribution margin, which included selling, general, and administrative expenses directly allocable to an operating segment and excluded certain corporate costs not associated with the operations of the segment. These corporate costs were separately stated and included costs related to functional areas such as operations management, corporate purchasing, accounting, treasury, information technology, legal and human resources. After evaluation in this quarter of the Company’s comparability to industry peers and practices, the chief operating decision maker changed the method to evaluate the Company’s operating segments’ performance based on segment gross margin, which does not include any selling, general, and administrative costs or corporate costs. The change to using segment gross margin results in an increase in segment profitability compared to segment contribution margin as allocable selling, general, and administrative costs were charged against segment contribution margin. This change is effective beginning the three months ended September 30, 2016. All periods presented have been restated accordingly. Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Revenues Proppant Solutions $ 103,140 $ 141,584 $ 302,705 $ 602,603 Industrial & Recreational Products 31,635 29,366 91,777 91,160 Total revenues 134,775 170,950 394,482 693,763 Segment gross margin Proppant Solutions 6,356 26,788 9,419 160,492 Industrial & Recreational Products 13,546 12,483 37,597 33,914 Total segment gross margin 19,902 39,271 47,016 194,406 Operating expenses excluded from segment gross margin Selling, general, and administrative 15,443 18,314 53,194 61,538 Depreciation, depletion, and amortization 17,759 15,260 54,401 47,759 Stock compensation expense 1,799 2,679 7,366 7,180 Asset impairments — 4,169 90,654 10,644 Restructuring charges — 284 1,155 8,957 Other operating expense (income) 9,362 (878 ) 9,266 (278 ) Interest expense, net 16,175 15,963 50,043 46,165 Other non-operating expense (income) — 1,492 (5 ) 1,492 Income (loss) before provision for income taxes $ (40,636 ) $ (18,012 ) $ (219,058 ) $ 10,949

Restructuring Charges

Restructuring Charges	9 Months Ended
	Sep. 30, 2016
Restructuring and Related Activities [Abstract]
Restructuring Charges	15. Restructuring Charges As a result of challenging conditions in the energy market, the Company began taking actions in early 2015 to adjust its overall operational footprint and reduce costs. The Company’s continuing restructuring program primarily consists of workforce reductions and costs to idle or exit facilities. The Company has largely completed these activities, however, a continued sustained downturn in the oil and gas market could reinitiate this restructuring process. A summary of the restructuring costs recognized for the nine months ended September 30, 2016 and 2015, respectively, is as follows: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Restructuring charges Workforce reduction costs, including one-time severance payments $ — $ 284 $ 1,155 $ 1,009 Other exit costs, including multiemployer pension plan withdrawal liability and additional cash costs to exit facilities — — — 7,948 Total restructuring charges $ — $ 284 $ 1,155 $ 8,957 A summary of the restructuring costs by operating segment is as follows: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Restructuring charges Proppant Solutions $ — $ — $ — $ 1,162 Industrial & Recreational Products — — — 6,786 Corporate — 284 1,155 1,009 Total restructuring charges $ — $ 284 $ 1,155 $ 8,957

Indefinite-Lived Intangibles

Indefinite-Lived Intangibles	9 Months Ended
	Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Indefinite-Lived Intangibles	16. Indefinite-Lived Intangibles As of September 30, 2016, the balance of Goodwill was $15,301, which represents goodwill related to acquisitions in the Company’s Industrial & Recreational Products segment. As part of Company policy in its normal course of business, the Company performed a review of qualitative factors and concluded that, as of September 30, 2016, there were no events or changes in circumstances that would more likely than not result in an impairment of the carrying value of its intangible assets, including goodwill. With the current market conditions in the oil and gas industry, there could be future changes that impact the carrying value of other long-lived intangibles, including the supply agreement with FTS International Services, LLC (“FTSI”). As of September 30, 2016, the balance of the FTSI supply agreement, net of accumulated amortization, was $36,250.

Subsequent Event

Subsequent Event	9 Months Ended
	Sep. 30, 2016
Subsequent Events [Abstract]
Subsequent Event	17. Subsequent Event On October 25, 2016, the Company completed a public offering of 30,250 shares of its common stock. In addition, the underwriter has thirty days from the offering date to exercise an overallotment option to purchase an additional 4,538 shares. Cash proceeds received by the Company for the shares sold were approximately $277,000, net of underwriting commissions and estimated offering expenses. After these transactions, there were 222,766 shares of common stock issued and outstanding as of October 31, 2016. The Company intends to use the net proceeds of the offering for general corporate purposes, which include, but are not limited to repayment of debt and satisfaction of other obligations.

Significant Accounting Polici25

Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2016
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The unaudited condensed consolidated financial statements of Fairmount Santrol Holdings Inc. and its consolidated subsidiaries (collectively, the “Company”) have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. In the opinion of management, the unaudited condensed consolidated financial statements reflect all adjustments (which are of a normal, recurring nature) and disclosures necessary for a fair statement of the financial position, results of operations, comprehensive income, and cash flows of the reported interim periods. The condensed consolidated balance sheet as of December 31, 2015 was derived from audited financial statements, but does not include all disclosures required by GAAP. Interim results are not necessarily indicative of the results to be expected for the full year or any other interim period. These unaudited condensed consolidated financial statements should be read in conjunction with the Company’s consolidated financial statements as filed in the 2015 Annual Report on Form 10-K and notes thereto and information included elsewhere in this Quarterly Report on Form 10-Q.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates.
Change in Classification	Change in Classification In the three months ended June 30, 2016, the Company changed the classification of certain operating expenses on the Condensed Consolidated Statements of Income (Loss). Previously, the Company classified expenses incurred related to the downturn in the proppant market as “restructuring and other charges.” The Company now further classifies these types of expenses between asset impairments and restructuring charges. All periods presented have been restated accordingly. See Note 15 for further detail.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In April 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2015-03 – Interest – Imputation of Interest In February 2016, the FASB issued ASU No. 2016-02 – Leases Leases In March 2016, the FASB issued ASU No. 2016-09 – Compensation – Stock Compensation In April and May 2016, the FASB issued ASU No. 2016-10 – Revenue from Contracts with Customers – Identifying Performance Obligations and Licensing Revenue Recognition and Derivatives and Hedging – Recession of SEC Guidance Revenue from Contracts with Customers – Narrow-Scope Improvements and Practical Expedients – Revenue from Contracts with Customers In August 2016, the FASB issued ASU No. 2016-15 – Statement of Cash Flows – Classifications of Certain Cash Receipts and Cash Payments

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 30, 2016
Inventory Disclosure [Abstract]
Schedule of Inventories	At September 30, 2016 and December 31, 2015, inventories consisted of the following: September 30, 2016 December 31, 2015 Raw materials $ 6,721 $ 10,145 Work-in-process 12,262 14,613 Finished goods 36,767 48,648 55,750 73,406 Less: LIFO reserve (2,596 ) (2,912 ) Inventories $ 53,154 $ 70,494

Property, Plant, and Equipment

Property, Plant, and Equipment (Tables)	9 Months Ended
	Sep. 30, 2016
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant, and Equipment	At September 30, 2016 and December 31, 2015, property, plant, and equipment consisted of the following: September 30, 2016 December 31, 2015 Land and improvements $ 85,289 $ 82,966 Mineral reserves and mine development 249,714 323,691 Machinery and equipment 577,240 575,034 Buildings and improvements 153,615 171,791 Furniture, fixtures, and other 3,450 3,609 Construction in progress 38,059 37,047 1,107,367 1,194,138 Accumulated depletion and depreciation (363,368 ) (323,141 ) Property, plant, and equipment, net $ 743,999 $ 870,997

Long-Term Debt (Tables)

Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Schedule of Long-Term Debt	At September 30, 2016 and December 31, 2015, long-term debt consisted of the following: September 30, 2016 December 31, 2015 Term B-1 Loans $ 16,754 $ 156,134 Term B-2 Loans 896,029 902,402 Extended Term B-1 Loans 158,716 159,878 2016 Extended Term Loans 69,502 — Industrial Revenue bond 10,000 10,000 Revolving credit facility and other 88 101 Capital leases, net 4,514 9,301 Deferred financing costs, net (11,521 ) (14,710 ) 1,144,082 1,223,106 Less: current portion (30,394 ) (17,385 ) Long-term debt including leases $ 1,113,688 $ 1,205,721
Summary of Change in Maturities of Term Loans	Under the terms of the agreement, the change in the maturities of the Term B-1 Loans and the 2016 Extended Term Loans are as follows: Principal Payments Due Date Prior to Extension Subsequent to Extension 4/28/2016 (A) $ — $ 69,580 6/30/2016 400 43 9/30/2016 400 43 12/31/2016 400 43 3/17/2017 154,812 16,723 7/15/2018 — 69,580 Total (B) $ 156,012 $ 156,012 (A) - The principal payment shown for April 28, 2016 represents a prepayment of principal to the lenders consenting to the extended maturity. (B) - These amounts do not reflect the amortization of original issue discounts.

Earnings (Loss) per Share (Tabl

Earnings (Loss) per Share (Tables)	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings (Loss) per Share	The table below shows the computation of basic and diluted earnings (loss) per share for the three and nine months ended September 30, 2016 and 2015: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Numerator: Net loss attributable to Fairmount Santrol Holdings Inc. $ (20,625 ) $ (46,200 ) $ (120,287 ) $ (1,304 ) Denominator: Basic weighted average shares outstanding 183,620 161,413 168,904 161,241 Dilutive effect of employee stock options, RSUs, and PRSUs — — — — Diluted weighted average shares outstanding 183,620 161,413 168,904 161,241 Loss per common share - basic $ (0.11 ) $ (0.29 ) $ (0.71 ) $ (0.01 ) Loss per common share - diluted $ (0.11 ) $ (0.29 ) $ (0.71 ) $ (0.01 )

Derivative Instruments (Tables)

Derivative Instruments (Tables)	9 Months Ended
	Sep. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Values of Derivative Instrument and Respective Classification in Condensed Consolidated Balance Sheets	The following table summarizes the fair values and the respective classification in the Condensed Consolidated Balance Sheets as of September 30, 2016 and December 31, 2015: Assets (Liabilities) Interest Rate Swap Agreements Balance Sheet Classification September 30, 2016 December 31, 2015 Designated as hedges Other long-term liabilities $ (18,972 ) $ (12,107 ) Designated as hedges Other assets 22 118 $ (18,950 ) $ (11,989 )
Schedule of Interest Expense Recognized on Derivative	In order to represent the ineffective portion of interest rate swap agreements designated as hedges, the Company recognized in interest expense the following in the three and nine months ended September 30, 2016 and 2015: Derivatives in ASC 815-20 Cash Flow Hedging Relationships Location of Gain (Loss) Recognized in Income on Derivative (Ineffective Portion) Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Interest rate swap agreements Interest expense (income) $ (153 ) $ 14 $ 46 $ 30 $ (153 ) $ 14 $ 46 $ 30

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Schedule of Fair Value on a Long-term debt	The following table presents the fair value as of September 30, 2016 and December 31, 2015 for the Company’s long-term debt: Long-Term Debt Fair Value Measurements Quoted Prices Other Unobservable Total September 30, 2016 Term B-1 Loans $ — $ 16,179 $ — $ 16,179 Term B-2 Loans — 799,505 — 799,505 Extended Term B-1 Loans — 139,140 — 139,140 2016 Extended Term Loans — 66,275 — 66,275 $ — $ 1,021,099 $ — $ 1,021,099 December 31, 2015 Term B-1 Loans $ — $ 106,360 $ — $ 106,360 Term B-2 Loans — 443,580 — 443,580 Extended Term B-1 Loans — 76,922 — 76,922 $ — $ 626,862 $ — $ 626,862
Financial Instruments Carried at Fair Value	The following table presents the amounts carried at fair value as of September 30, 2016 and December 31, 2015 for the Company’s other financial instruments. Recurring Fair Value Measurements Quoted Prices Other Unobservable (Level 3) Total September 30, 2016 Interest rate swap agreements $ — $ (18,950 ) $ — $ (18,950 ) $ — $ (18,950 ) $ — $ (18,950 ) December 31, 2015 Interest rate swap agreements $ — $ (11,989 ) $ — $ (11,989 ) $ — $ (11,989 ) $ — $ (11,989 )

Common Stock and Stock-Based 32

Common Stock and Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Share Based Compensation Activity of Option and Non-option Instruments	Options Weighted Restricted Weighted Performance Weighted Outstanding at December 31, 2015 16,277 $ 6.28 579 $ 10.45 — $ — Granted 1,740 2.24 1,025 2.42 481 2.27 Exercised (1,729 ) 2.34 (14 ) 8.83 — — Forfeited (475 ) 8.53 (116 ) 6.98 (23 ) 2.04 Expired (697 ) 8.64 — — — — Outstanding at September 30, 2016 15,116 $ 6.07 1,474 $ 5.11 458 $ 2.28

Defined Benefit Plans (Tables)

Defined Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2016
Net Periodic Benefit Cost [Member]
Summary of Defined Benefit Plans	Net periodic benefit cost recognized for other Company defined benefit pension plans for the three and nine months ended September 30, 2016 and 2015 is as follows: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Components of net periodic benefit cost Service cost $ 21 27 $ 63 $ 81 Interest cost 87 85 261 255 Expected return on plan assets (120 ) (127 ) (360 ) (381 ) Amortization of prior service cost — 4 — 12 Amortization of net actuarial loss 66 70 175 210 Net periodic benefit cost $ 54 $ 59 $ 139 $ 177

Accumulated Other Comprehensi34

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2016
Equity [Abstract]
Components of Accumulated Other Comprehensive Income (Loss)	The components of accumulated other comprehensive income (loss) attributable to Fairmount Santrol Holdings Inc. at September 30, 2016 and December 31, 2015 were as follows: September 30, 2016 Gross Tax Effect Net Amount Foreign currency translation $ (10,392 ) $ 2,012 $ (8,380 ) Additional pension liability (3,840 ) 1,464 (2,376 ) Unrealized gain (loss) on interest rate hedges (17,449 ) 6,229 (11,220 ) $ (31,681 ) $ 9,705 $ (21,976 ) December 31, 2015 Gross Tax Effect Net Amount Foreign currency translation $ (10,030 ) $ 1,318 $ (8,712 ) Additional pension liability (4,014 ) 1,464 (2,550 ) Unrealized gain (loss) on interest rate hedges (10,128 ) 3,697 (6,431 ) $ (24,172 ) $ 6,479 $ (17,693 )
Changes in Accumulated Other Comprehensive Income by Component	The following table presents the changes in accumulated other comprehensive income by component for the nine months ended September 30, 2016: Nine Months Ended September 30, 2016 Unrealized Foreign Additional gain (loss) currency pension on interest translation liability rate hedges Total Beginning balance $ (8,712 ) $ (2,550 ) $ (6,431 ) $ (17,693 ) Other comprehensive income (loss) before reclassifications 332 — (8,015 ) (7,683 ) Amounts reclassified from accumulated other comprehensive income (loss) — 174 3,226 3,400 Ending balance $ (8,380 ) $ (2,376 ) $ (11,220 ) $ (21,976 )
Reclassifications out of Accumulated Comprehensive Income	The following table presents the reclassifications out of accumulated other comprehensive income during the nine months ended September 30, 2016: Amount reclassified from accumulated other comprehensive Affected line item on Details about accumulated other comprehensive income income the statement of income Change in fair value of derivative swap agreements Interest rate hedging contracts $ 4,963 Interest expense Tax effect (1,738 ) Tax expense (benefit) $ 3,225 Net of tax Amortization of pension obligations Prior service cost $ — Cost of sales Actuarial losses 175 Cost of sales 175 Total before tax Tax effect — Tax expense 175 Net of tax Total reclassifications for the period $ 3,400 Net of tax

Commitments and Contingent Li35

Commitments and Contingent Liabilities (Tables)	9 Months Ended
	Sep. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Change in Future Purchase Commitments	The following table shows the change in future purchase commitments as a result of these negotiations: Payments Due by Period Total Less than 1 Year 1-3 Years 3-5 Years More than 5 Years Original purchase obligations $ 181,968 $ — $ 181,968 $ — $ — Purchase commitment increase (decrease) (45,512 ) — (181,968 ) 136,456 — Revised purchase commitments $ 136,456 $ — $ — $ 136,456 $ —
Schedule of Change in Future Minimum Operating Lease Payments	The modified future minimum operating lease payments and associated changes are as follows: 2021 and Equipment lease expense 2016 2017 2018 2019 2020 Thereafter December 31, 2015 $ 57,536 $ 47,402 $ 39,610 $ 25,408 $ 13,291 $ 46,579 Future minimum lease expense increase (decrease) from railcar negotiations (2,064 ) (3,707 ) 1,349 11,897 20,189 63,901 Modified future lease expense $ 55,472 $ 43,695 $ 40,959 $ 37,305 $ 33,480 $ 110,480

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2016
Segment Reporting [Abstract]
Summarized Financial Information for Reportable Segments	Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Revenues Proppant Solutions $ 103,140 $ 141,584 $ 302,705 $ 602,603 Industrial & Recreational Products 31,635 29,366 91,777 91,160 Total revenues 134,775 170,950 394,482 693,763 Segment gross margin Proppant Solutions 6,356 26,788 9,419 160,492 Industrial & Recreational Products 13,546 12,483 37,597 33,914 Total segment gross margin 19,902 39,271 47,016 194,406 Operating expenses excluded from segment gross margin Selling, general, and administrative 15,443 18,314 53,194 61,538 Depreciation, depletion, and amortization 17,759 15,260 54,401 47,759 Stock compensation expense 1,799 2,679 7,366 7,180 Asset impairments — 4,169 90,654 10,644 Restructuring charges — 284 1,155 8,957 Other operating expense (income) 9,362 (878 ) 9,266 (278 ) Interest expense, net 16,175 15,963 50,043 46,165 Other non-operating expense (income) — 1,492 (5 ) 1,492 Income (loss) before provision for income taxes $ (40,636 ) $ (18,012 ) $ (219,058 ) $ 10,949

Restructuring Charges (Tables)

Restructuring Charges (Tables)	9 Months Ended
	Sep. 30, 2016
Restructuring and Related Activities [Abstract]
Summary of Restructuring Costs Recognized	A summary of the restructuring costs recognized for the nine months ended September 30, 2016 and 2015, respectively, is as follows: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Restructuring charges Workforce reduction costs, including one-time severance payments $ — $ 284 $ 1,155 $ 1,009 Other exit costs, including multiemployer pension plan withdrawal liability and additional cash costs to exit facilities — — — 7,948 Total restructuring charges $ — $ 284 $ 1,155 $ 8,957
Summary of Restructuring and Costs by Operating Segment	A summary of the restructuring costs by operating segment is as follows: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Restructuring charges Proppant Solutions $ — $ — $ — $ 1,162 Industrial & Recreational Products — — — 6,786 Corporate — 284 1,155 1,009 Total restructuring charges $ — $ 284 $ 1,155 $ 8,957

Inventories - Schedule of Inven

Inventories - Schedule of Inventories (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Raw materials	$ 6,721	$ 10,145
Work-in-process	12,262	14,613
Finished goods	36,767	48,648
Inventory gross	55,750	73,406
Less: LIFO reserve	(2,596)	(2,912)
Inventories	$ 53,154	$ 70,494

Property, Plant, and Equipmen39

Property, Plant, and Equipment - Schedule of Property, Plant, and Equipment (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	$ 1,107,367	$ 1,194,138
Accumulated depletion and depreciation	(363,368)	(323,141)
Property, plant, and equipment, net	743,999	870,997
Land and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	85,289	82,966
Mineral Reserves and Mine Development [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	249,714	323,691
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	577,240	575,034
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	153,615	171,791
Furniture, Fixtures and Other [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	3,450	3,609
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	$ 38,059	$ 37,047

Property, Plant, and Equipmen40

Property, Plant, and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Property Plant And Equipment Capitalized Interest Costs [Abstract]
Asset impairments	$ 0	$ 4,169	$ 90,654	$ 10,644

Long-Term Debt - Schedule of Lo

Long-Term Debt - Schedule of Long-Term Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Industrial Revenue bond	$ 10,000	$ 10,000
Revolving credit facility and other	88	101
Capital leases, net	4,514	9,301
Deferred financing costs, net	(11,521)	(14,710)
Long term debt	1,144,082	1,223,106
Long term debt	1,144,082	1,223,106
Less: current portion	(30,394)	(17,385)
Long-term debt including leases	1,113,688	1,205,721
Term B-1 Loans [Member]
Debt Instrument [Line Items]
Term Loans	16,754	156,134
Revolving credit facility and other	156,012
Term B-2 Loans [Member]
Debt Instrument [Line Items]
Term Loans	896,029	902,402
Extended Term B-1 Loans [Member]
Debt Instrument [Line Items]
Term Loans	158,716	$ 159,878
2016 Extended Term Loans [Member]
Debt Instrument [Line Items]
Term Loans	69,502
Revolving credit facility and other	$ 156,012

Long-Term Debt - Additional Inf

Long-Term Debt - Additional Information (Detail) - USD ($)	Sep. 30, 2016	Apr. 28, 2016	Sep. 30, 2016	Sep. 30, 2015	Oct. 17, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Applicable margin on interest rate			0.91%
Outstanding term loans	$ 88,000		$ 88,000			$ 101,000
Debt instrument borrowings, maturity date			Sep. 1, 2027
Prepayment of accrued interest		$ 227,000
Prepayment of principal amount		$ 69,580,000
Outstanding letters of credit	13,818,000		$ 13,818,000
Industrial revenue bond outstanding	10,000,000		10,000,000
Letter of credit	10,000,000		10,000,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Available capacity remaining on the revolving credit facility	$ 17,432,000		$ 17,432,000
Revolving Credit Facility [Member] | Borrowings [Member]
Debt Instrument [Line Items]
Interest rate of borrowings	4.30%		4.30%
3/17/2017 [Member]
Debt Instrument [Line Items]
Outstanding term loans	$ 16,723,000		$ 16,723,000
Debt instrument borrowings, maturity date	Mar. 17, 2017		Mar. 17, 2017
Term B-1 Loans [Member]
Debt Instrument [Line Items]
Outstanding term loans	$ 156,012,000		$ 156,012,000
Term B-1 Loans [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Applicable margin on interest rate	2.50%		2.50%
Term B-1 Loans [Member] | Eurodollar [Member]
Debt Instrument [Line Items]
Applicable margin on interest rate	3.50%		3.50%
Floor rate	0.00%
Term B-1 Loans [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate of borrowings	4.40%		4.40%
Term B-1 Loans [Member] | 3/17/2017 [Member]
Debt Instrument [Line Items]
Outstanding term loans	$ 154,812,000		$ 154,812,000
Term B-2 Loans [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Applicable margin on interest rate	2.50%		2.50%
Term B-2 Loans [Member] | Eurodollar [Member]
Debt Instrument [Line Items]
Applicable margin on interest rate	3.50%		3.50%
Floor rate	1.00%
Term B-2 Loans [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate of borrowings	4.50%		4.50%
2013 Pre Amendment [Member] | Revolving Credit Facility [Member] | US [Member]
Debt Instrument [Line Items]
Total Revolving Credit Facility commitment				$ 124,000,000
2013 Amended Credit Agreement [Member]
Debt Instrument [Line Items]
Leverage ratio			96.00%
2013 Amended Credit Agreement [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Total Revolving Credit Facility commitment				31,250,000
2013 Amended Credit Agreement [Member] | Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Outstanding term loans				31,250,000
2013 Amended Credit Agreement [Member] | Revolving Credit Facility [Member] | US [Member]
Debt Instrument [Line Items]
Total Revolving Credit Facility commitment				99,000,000
2013 Amended Credit Agreement [Member] | Revolving Credit Facility [Member] | Canada [Member]
Debt Instrument [Line Items]
Total Revolving Credit Facility commitment				1,000,000
2013 Amended Credit Agreement [Member] | Period from Third Quarter of 2015 to Fourth Quarter of 2016 [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Total Revolving Credit Facility commitment				$ 40,000,000
2013 Amended Credit Agreement [Member] | Period from Third Quarter of 2015 to Fourth Quarter of 2016 [Member] | Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Leverage ratio				475.00%
2013 Amended Credit Agreement [Member] | First Quarter of 2017 [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Total Revolving Credit Facility commitment				$ 100,000,000
2013 Amended Credit Agreement [Member] | First Quarter of 2017 [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Leverage ratio				650.00%
2013 Amended Credit Agreement [Member] | Fourth Quarter of 2017 [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Leverage ratio				475.00%
2016 Extended Term Loans [Member]
Debt Instrument [Line Items]
Outstanding term loans	$ 156,012,000		$ 156,012,000
Debt instrument borrowings, maturity date		Jul. 15, 2018
2016 Extended Term Loans [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Applicable margin on interest rate	2.50%
2016 Extended Term Loans [Member] | Eurodollar [Member]
Debt Instrument [Line Items]
Applicable margin on interest rate	3.50%
Floor rate	1.00%
2016 Extended Term Loans [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate of borrowings	4.50%		4.50%
2016 Extended Term Loans [Member] | 3/17/2017 [Member]
Debt Instrument [Line Items]
Outstanding term loans	$ 16,723,000		$ 16,723,000
Extended Term B-1 Loans [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Repurchases of term loans					$ 3,000,000
Repurchased term loan as percentage of par					91.50%
Extended Term B-1 Loans [Member] | Eurodollar [Member]
Debt Instrument [Line Items]
Applicable margin on interest rate	3.50%
Floor rate	1.00%
Extended Term B-1 Loans [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate of borrowings	4.50%		4.50%

Long-Term Debt - Summary of Cha

Long-Term Debt - Summary of Change in Maturities of Term Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Apr. 28, 2016	Sep. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Due Date			Sep. 1, 2027
Principal Payments	$ 88		$ 88	$ 101
4/28/2016 [Member]
Debt Instrument [Line Items]
Due Date			Apr. 28, 2016
6/30/2016 [Member]
Debt Instrument [Line Items]
Due Date			Jun. 30, 2016
9/30/2016 [Member]
Debt Instrument [Line Items]
Due Date			Sep. 30, 2016
12/31/2016 [Member]
Debt Instrument [Line Items]
Due Date			Dec. 31, 2016
3/17/2017 [Member]
Debt Instrument [Line Items]
Due Date	Mar. 17, 2017		Mar. 17, 2017
Principal Payments	$ 16,723		$ 16,723
7/15/2018 [Member]
Debt Instrument [Line Items]
Due Date			Jul. 15, 2018
Term B-1 Loans [Member]
Debt Instrument [Line Items]
Principal Payments	156,012		$ 156,012
Term B-1 Loans [Member] | 6/30/2016 [Member]
Debt Instrument [Line Items]
Principal Payments	400		400
Term B-1 Loans [Member] | 9/30/2016 [Member]
Debt Instrument [Line Items]
Principal Payments	400		400
Term B-1 Loans [Member] | 12/31/2016 [Member]
Debt Instrument [Line Items]
Principal Payments	400		400
Term B-1 Loans [Member] | 3/17/2017 [Member]
Debt Instrument [Line Items]
Principal Payments	154,812		154,812
2016 Extended Term Loans [Member]
Debt Instrument [Line Items]
Due Date		Jul. 15, 2018
Principal Payments	156,012		156,012
2016 Extended Term Loans [Member] | 4/28/2016 [Member]
Debt Instrument [Line Items]
Principal Payments	69,580		69,580
2016 Extended Term Loans [Member] | 6/30/2016 [Member]
Debt Instrument [Line Items]
Principal Payments	43		43
2016 Extended Term Loans [Member] | 9/30/2016 [Member]
Debt Instrument [Line Items]
Principal Payments	43		43
2016 Extended Term Loans [Member] | 12/31/2016 [Member]
Debt Instrument [Line Items]
Principal Payments	43		43
2016 Extended Term Loans [Member] | 3/17/2017 [Member]
Debt Instrument [Line Items]
Principal Payments	16,723		16,723
2016 Extended Term Loans [Member] | 7/15/2018 [Member]
Debt Instrument [Line Items]
Principal Payments	$ 69,580		$ 69,580

Earnings (Loss) per Share - Com

Earnings (Loss) per Share - Computation of Basic and Diluted Earnings (Loss) per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Numerator:
Net loss attributable to Fairmount Santrol Holdings Inc.	$ (20,625)	$ (46,200)	$ (120,287)	$ (1,304)
Denominator:
Basic weighted average shares outstanding	183,620,000	161,413,000	168,904,000	161,241,000
Dilutive effect of employee stock options, RSUs, and PRSUs	0	0	0	0
Diluted weighted average shares outstanding	183,620,000	161,413,000	168,904,000	161,241,000
Loss per common share - basic	$ (0.11)	$ (0.29)	$ (0.71)	$ (0.01)
Loss per common share - diluted	$ (0.11)	$ (0.29)	$ (0.71)	$ (0.01)

Derivative Instruments - Additi

Derivative Instruments - Additional Information (Detail) - Interest Rate Swap Agreements [Member] - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2017
Derivative [Line Items]
Notional amount of swap agreements	$ 525,225,000
Current notional amount as percent of term debt outstanding	46.00%
Scenario, Forecast [Member] | Interest Expense [Member]
Derivative [Line Items]
Reclassification from Accumulated other comprehensive income (loss)		$ 6,982,000
Minimum [Member]
Derivative [Line Items]
Derivative variable interest rate	0.83%
Interest rate swap agreement, maturity date	Mar. 15, 2017
Maximum [Member]
Derivative [Line Items]
Derivative variable interest rate	3.115%
Interest rate swap agreement, maturity date	Sep. 5, 2019

Derivative Instruments - Fair V

Derivative Instruments - Fair Values of Derivative Instrument and Respective Classification in Condensed Consolidated Balance Sheets (Detail) - Interest Rate Swap Agreements [Member] - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Derivative, fair value	$ (18,950)	$ (11,989)
Designated as Hedges [Member] | Other Long-Term Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	(18,972)	(12,107)
Designated as Hedges [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	$ 22	$ 118

Derivative Instruments - Schedu

Derivative Instruments - Schedule of Interest Expense Derivatives (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Derivatives, Fair Value [Line Items]
Interest expense (income)	$ (16,175)	$ (15,963)	$ (50,043)	$ (46,165)
Interest Rate Swap Agreements [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member]
Derivatives, Fair Value [Line Items]
Interest expense (income)	(153)	14	46	30
Interest Rate Swap Agreements [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member] | Interest Income Expense [Member]
Derivatives, Fair Value [Line Items]
Interest expense (income)	$ (153)	$ 14	$ 46	$ 30

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Fair Value on a Long-term debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of long term debt	$ 1,021,099	$ 626,862
Term B-1 Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of long term debt	16,179	106,360
Term B-2 Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of long term debt	799,505	443,580
Extended Term B-1 Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of long term debt	139,140	76,922
2016 Extended Term Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of long term debt	66,275
Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of long term debt	1,021,099	626,862
Other Observable Inputs (Level 2) [Member] | Term B-1 Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of long term debt	16,179	106,360
Other Observable Inputs (Level 2) [Member] | Term B-2 Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of long term debt	799,505	443,580
Other Observable Inputs (Level 2) [Member] | Extended Term B-1 Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of long term debt	139,140	$ 76,922
Other Observable Inputs (Level 2) [Member] | 2016 Extended Term Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of long term debt	$ 66,275

Fair Value Measurements - Finan

Fair Value Measurements - Financial Instruments Carried at Fair Value (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Interest Rate Swap Agreements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements	$ (18,950)	$ (11,989)
Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Net Asset (Liability)	(18,950)	(11,989)
Recurring Fair Value Measurements [Member] | Interest Rate Swap Agreements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements	(18,950)	(11,989)
Other Observable Inputs (Level 2) [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Net Asset (Liability)	(18,950)	(11,989)
Other Observable Inputs (Level 2) [Member] | Recurring Fair Value Measurements [Member] | Interest Rate Swap Agreements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements	$ (18,950)	$ (11,989)

Common Stock and Stock Based Co

Common Stock and Stock Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2016	Sep. 30, 2016	Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted to purchase		1,740	1,631
Average grant date fair value of options issued		$ 2.24	$ 3.96
Performance restricted stock units issued		1,025	363
Stock compensation expense related to modification of retirement provisions	$ 2,135
Modification of retirement provision, description		The modification allows retirement-eligible participants (defined as age 55, plus 10 years of service) to continue to vest in options following retirement, and also allows retired participants to exercise options for up to 10 years from grant date.
Retired participants options exercise period from grant date		10 years
Performance Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance restricted stock units issued		481	0

Common Stock and Stock Based 51

Common Stock and Stock Based Compensation - Summary of Share Based Compensation Activity of Option and Non-option Instruments (Detail) - $ / shares shares in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, Outstanding Beginning Balance	16,277
Options, Granted	1,740	1,631
Options, Exercised	(1,729)
Options, Forfeited	(475)
Options, Expired	(697)
Options, Outstanding Ending Balance	15,116
Weighted Average Exercise Price, Option, Outstanding Beginning Balance	$ 6.28
Weighted Average Exercise Price, Option, Granted	2.24
Weighted Average Exercise Price, Option, Exercised	2.34
Weighted Average Exercise Price, Option, Forfeited	8.53
Weighted Average Exercise Price, Option, Expired	8.64
Weighted Average Exercise Price, Option, Outstanding Ending Balance	$ 6.07
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance Restricted Stock Units, Outstanding Beginning Balance	579
Performance Restricted Stock Units, Granted	1,025
Options, Exercised	(14)
Options, Forfeited	(116)
Performance Restricted Stock Units, Outstanding Ending Balance	1,474
Weighted Average Price at PRSU Issue Date, Outstanding Beginning Balance	$ 10.45
Weighted Average Price at PRSU Issue Date, Granted	2.42
Weighted Average Price at RSU Issue Date, Exercised	8.83
Weighted Average Price at PRSU Issue Date, Forfeited	6.98
Weighted Average Price at PRSU Issue Date, Outstanding Ending Balance	$ 5.11
Performance Restricted Stock Units PRSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance Restricted Stock Units, Granted	481
Options, Forfeited	(23)
Performance Restricted Stock Units, Outstanding Ending Balance	458
Weighted Average Price at PRSU Issue Date, Granted	$ 2.27
Weighted Average Price at PRSU Issue Date, Forfeited	2.04
Weighted Average Price at PRSU Issue Date, Outstanding Ending Balance	$ 2.28

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Provision (benefit) for income taxes	$ (20,013)	$ 28,117	$ (98,786)	$ 12,057
Income (Loss) before income taxes	$ (40,636)	$ (18,012)	$ (219,058)	$ 10,949
Effective income tax rate	49.20%	(156.10%)	45.10%	110.10%

Defined Benefit Plans - Additio

Defined Benefit Plans - Additional Information (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)Pension_Plan	Sep. 30, 2015USD ($)
Compensation and Retirement Disclosure [Abstract]
Number of defined benefit pension plans | Pension_Plan	2
Pension and postretirement contributions	$ 59	$ 48
Expected contribution for pension plan remaining fiscal year	$ 76

Defined Benefit Plans - Summary

Defined Benefit Plans - Summary of Defined Benefit Plans (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Compensation and Retirement Disclosure [Abstract]
Service cost	$ 21	$ 27	$ 63	$ 81
Interest cost	87	85	261	255
Expected return on plan assets	(120)	(127)	(360)	(381)
Amortization of prior service cost		4		12
Amortization of net actuarial loss	66	70	175	210
Net periodic benefit cost	$ 54	$ 59	$ 139	$ 177

Accumulated Other Comprehensi55

Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), Gross	$ (31,681)	$ (24,172)
Accumulated other comprehensive income (loss), Tax Effect	9,705	6,479
Accumulated other comprehensive income (loss)	(21,976)	(17,693)
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), Gross	(10,392)	(10,030)
Accumulated other comprehensive income (loss), Tax Effect	2,012	1,318
Accumulated other comprehensive income (loss)	(8,380)	(8,712)
Additional Pension Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), Gross	(3,840)	(4,014)
Accumulated other comprehensive income (loss), Tax Effect	1,464	1,464
Accumulated other comprehensive income (loss)	(2,376)	(2,550)
Unrealized Gain (Loss) on Interest Rate Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), Gross	(17,449)	(10,128)
Accumulated other comprehensive income (loss), Tax Effect	6,229	3,697
Accumulated other comprehensive income (loss)	$ (11,220)	$ (6,431)

Accumulated Other Comprehensi56

Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income by Component (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (17,693)
Other comprehensive income (loss) before reclassifications	(7,683)
Amounts reclassified from accumulated other comprehensive income (loss)	3,400
Ending balance	(21,976)
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(8,712)
Other comprehensive income (loss) before reclassifications	332
Ending balance	(8,380)
Additional Pension Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(2,550)
Amounts reclassified from accumulated other comprehensive income (loss)	174
Ending balance	(2,376)
Unrealized Gain (Loss) on Interest Rate Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(6,431)
Other comprehensive income (loss) before reclassifications	(8,015)
Amounts reclassified from accumulated other comprehensive income (loss)	3,226
Ending balance	$ (11,220)

Accumulated Other Comprehensi57

Accumulated Other Comprehensive Income (Loss) - Reclassifications out of Accumulated Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	$ (40,636)	$ (18,012)	$ (219,058)	$ 10,949
Tax expense (benefit)	(20,013)	28,117	(98,786)	12,057
Net loss	(20,623)	(46,129)	(120,272)	(1,108)
Cost of sales	$ 114,873	$ 131,679	347,466	$ 499,357
Reclassification Out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net loss			3,400
Reclassification Out of Accumulated Other Comprehensive Income [Member] | Unrealized Gain (Loss) on Interest Rate Hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense			4,963
Tax expense (benefit)			(1,738)
Net loss			(3,225)
Reclassification Out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment, Net Unamortized Gain (Loss) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales			175
Reclassification Out of Accumulated Other Comprehensive Income [Member] | Additional Pension Liability [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax			175
Net loss			$ 175

Commitments and Contingent Li58

Commitments and Contingent Liabilities - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 17, 2015	Sep. 30, 2016	Sep. 30, 2015
Commitments and Contingencies [Line Items]
Rent expense for lease		$ 51,130	$ 50,681
Fees paid to lessors		9,800
Purchase commitments due in 2017 and 2018 cancelled		49,500
Purchase commitments deferred		136,500
Future Railcar Purchase Price Increases [Member]
Commitments and Contingencies [Line Items]
Purchase commitments deferred		$ 3,900
Self-Suspending Proppant LLC [Member]
Commitments and Contingencies [Line Items]
Commitment period of sales		5 years
Commitment commencing date		Oct. 1, 2015
Aggregate earnout payment from the two-year period ending October 1, 2017 until the three-year period ending October 1, 2018	$ 45,000
Aggregate earnout payment during the two-year period ending October 1, 2017	$ 15,000
Security interest percentage of equity in contingent consideration	51.00%
Contingent consideration	$ 195,000
Contingent consideration accrued and capitalized		$ 1,537

Commitments and Contingent Li59

Commitments and Contingent Liabilities - Change in Future Purchase Commitments (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)
Future Purchase Commitments [Line Items]
Total	$ 136,456
Payments Due by Period Less than 1 Year	0
Payments Due by Period 3-5 Years	136,456
Payments Due by Period More than 5 Years	0
Purchase commitment increase (decrease), Total	(45,512)
Purchase commitment increase (decrease), Payments Due by Period Less than 1 Year	0
Purchase commitment increase (decrease), Payments Due by Period 1-3 Years	(181,968)
Purchase commitment increase (decrease), Payments Due by Period 3-5 Years	136,456
Purchase commitment increase (decrease), Payments Due by Period More than 5 Years	0
Before Modification [Member]
Future Purchase Commitments [Line Items]
Total	181,968
Payments Due by Period Less than 1 Year	0
Payments Due by Period 1-3 Years	181,968
Payments Due by Period More than 5 Years	$ 0

Commitments and Contingent Li60

Commitments and Contingent Liabilities - Schedule of Change in Future Minimum Operating Lease Payments (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)
Schedule Of Future Minimum Rental Payments For Operating Leases [Line Items]
2,016	$ 55,472
2,017	43,695
2,018	40,959
2,019	37,305
2,020	33,480
2021 and Thereafter	110,480
Future minimum lease payment increase (decrease), 2016	(2,064)
Future minimum lease payment increase (decrease), 2017	(3,707)
Future minimum lease payment increase (decrease), 2018	1,349
Future minimum lease payment increase (decrease), 2019	11,897
Future minimum lease payment increase (decrease), 2020	20,189
Future minimum lease payment increase (decrease), 2021 and Thereafter	63,901
Before Modification [Member]
Schedule Of Future Minimum Rental Payments For Operating Leases [Line Items]
2,016	57,536
2,017	47,402
2,018	39,610
2,019	25,408
2,020	13,291
2021 and Thereafter	$ 46,579

Transactions with Related Par61

Transactions with Related Parties - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Purchases from an affiliated entity	$ 503	$ 176
American Securities [Member]
Related Party Transaction [Line Items]
Management fees and expense payment	$ 209	$ 85

Segment Reporting - Additional

Segment Reporting - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2016Segments
Segment Reporting [Abstract]
Number of reportable segments	2

Segment Reporting - Summarized

Segment Reporting - Summarized Financial Information for Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues
Revenues	$ 134,775	$ 170,950	$ 394,482	$ 693,763
Segment gross margin
Segment gross margin	19,902	39,271	47,016	194,406
Operating expenses excluded from segment gross margin
Selling, general, and administrative	15,443	18,314	53,194	61,538
Depreciation, depletion, and amortization	17,759	15,260	54,401	47,759
Stock compensation expense	1,799	2,679	7,366	7,180
Asset impairments	0	4,169	90,654	10,644
Restructuring charges		284	1,155	8,957
Other operating expense (income)	9,362	(878)	9,266	(278)
Interest expense, net	16,175	15,963	50,043	46,165
Other non-operating expense (income)		1,492	(5)	1,492
Income (loss) before provision for income taxes	(40,636)	(18,012)	(219,058)	10,949
Proppant Solutions [Member]
Revenues
Revenues	103,140	141,584	302,705	602,603
Segment gross margin
Segment gross margin	6,356	26,788	9,419	160,492
Industrial & Recreational Products [Member]
Revenues
Revenues	31,635	29,366	91,777	91,160
Segment gross margin
Segment gross margin	$ 13,546	$ 12,483	$ 37,597	$ 33,914

Restructuring Charges - Summary

Restructuring Charges - Summary of Restructuring Costs Recognized (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Restructuring charges
Workforce reduction costs, including one-time severance payments	$ 284	$ 1,155	$ 1,009
Other exit costs, including multiemployer pension plan withdrawal liability and additional cash costs to exit facilities			7,948
Total restructuring charges	$ 284	$ 1,155	$ 8,957

Restructuring Charges - Summa65

Restructuring Charges - Summary of Restructuring Costs by Operating Segment (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 284	$ 1,155	$ 8,957
Operating Segments [Member] | Proppant Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring charges			1,162
Operating Segments [Member] | Industrial & Recreational Products [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring charges			6,786
Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 284	$ 1,155	$ 1,009

Indefinite-Lived Intangibles -

Indefinite-Lived Intangibles - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Goodwill [Line Items]
Goodwill	$ 15,301	$ 15,301
Industrial & Recreational Products [Member]
Goodwill [Line Items]
Goodwill	15,301
FTSI Supply Agreement [Member]
Goodwill [Line Items]
Supply agreement, net of accumulated amortization	$ 36,250

Subsequent Event - Additional I

Subsequent Event - Additional Information (Detail) - USD ($) shares in Thousands, $ in Thousands	Oct. 25, 2016	Oct. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Subsequent Event [Line Items]
Common stock, shares outstanding			191,947	161,433
Subsequent Event [Member]
Subsequent Event [Line Items]
Shares option to sell exercised by underwriters	4,538
Proceeds from issuance of common stock, net	$ 277,000
Common stock, shares issued		222,766
Common stock, shares outstanding		222,766
Subsequent Event [Member] | Common Stock [Member]
Subsequent Event [Line Items]
Shares sold	30,250