Bison Merger Sub I (FMSA) 10-Q 10 May 16 2016 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2016	May. 03, 2016
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q1
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		161,503,248

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income (Loss) (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Revenues	$ 145,458	$ 301,490
Cost of goods sold (excluding depreciation, depletion, amortization, and stock compensation expense shown separately)	118,464	202,548
Operating expenses
Selling, general and administrative expenses	16,625	24,020
Depreciation, depletion and amortization expense	18,586	16,223
Stock compensation expense	1,653	1,883
Restructuring charges	76	324
Other operating expense (income)	330	(313)
Income (loss) from operations	(10,276)	56,805
Interest expense, net	17,262	15,308
Other non-operating expense (income)	(5)
Income (loss) before provision for income taxes	(27,533)	41,497
Provision (benefit) for income taxes	(15,754)	10,617
Net income (loss)	(11,779)	30,880
Less: Net income (loss) attributable to the non-controlling interest	(3)	121
Net income (loss) attributable to Fairmount Santrol Holdings Inc.	$ (11,776)	$ 30,759
Earnings (loss) per share
Basic	$ (0.07)	$ 0.19
Diluted	$ (0.07)	$ 0.18
Weighted average number of shares outstanding
Basic	161,446	160,949
Diluted	161,446	166,331

Condensed Consolidated Stateme3

Condensed Consolidated Statements of Comprehensive Income (Loss) (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (11,779)	$ 30,880
Other comprehensive income (loss), net of tax
Foreign currency translation adjustment	(138)	(3,233)
Pension obligations	74	49
Change in fair value of derivative agreements	(1,909)	(2,735)
Total other comprehensive income (loss), net of tax	(1,973)	(5,919)
Comprehensive income (loss)	(13,752)	24,961
Comprehensive income (loss) attributable to the non-controlling interest	(3)	121
Comprehensive income (loss) attributable to Fairmount Santrol Holdings Inc.	$ (13,749)	$ 24,840

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 143,872	$ 171,486
Accounts receivable, net of allowance for doubtful accounts of $4,380 and $2,470 at March 31, 2016 and December 31, 2015, respectively	82,619	73,566
Inventories	69,392	70,494
Prepaid expenses and other assets	33,219	39,910
Current assets classified as held-for-sale (includes cash, accounts receivable, inventories, and property, plant, and equipment)	2,861	4,218
Total current assets	331,963	359,674
Property, plant and equipment, net	862,224	870,997
Deferred income taxes	834	834
Goodwill	15,301	15,301
Intangibles, net	95,354	96,482
Other assets	10,294	10,961
Total assets	1,315,970	1,354,249
Current liabilities
Current portion of long-term debt	100,307	17,385
Accounts payable	37,505	40,421
Accrued expenses	21,915	26,785
Current liabilities directly related to current assets classified as held-for-sale (includes accounts payable and accrued expenses)	456	934
Total current liabilities	160,183	85,525
Long-term debt	1,119,597	1,205,721
Deferred income taxes	73,502	89,569
Other long-term liabilities	36,327	33,802
Total liabilities	$ 1,389,609	$ 1,414,617
Commitments and contingent liabilities (Note 12)
Common stock: $0.01 par value, 1,850,000 authorized shares Shares outstanding: 161,503 and 161,433 at March 31, 2016 and December 31, 2015, respectively	$ 2,392	$ 2,391
Preferred stock: $0.01 par value, 100,000 authorized shares Shares outstanding: 0 at March 31, 2016 and December 31, 2015
Additional paid-in capital	$ 777,720	$ 776,705
Retained earnings	393,268	405,044
Accumulated other comprehensive income (loss)	(19,666)	(17,693)
Total equity attributable to Fairmount Santrol Holdings Inc. before treasury stock	1,153,714	1,166,447
Less: Treasury stock at cost Shares in treasury: 77,765 at March 31, 2016 and December 31, 2015	(1,227,663)	(1,227,663)
Total equity (deficit) attributable to Fairmount Santrol Holdings Inc.	(73,949)	(61,216)
Non-controlling interest	310	848
Total equity (deficit)	(73,639)	(60,368)
Total liabilities and equity	$ 1,315,970	$ 1,354,249

Condensed Consolidated Balance5

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 4,380	$ 2,470
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	1,850,000,000	1,850,000,000
Common stock, shares outstanding	161,503,000	161,433,000
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares outstanding	0	0
Shares in treasury	77,765,000	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	786	$ 1	785				786
Stock options exercised, shares		221
Stock compensation expense	1,883		1,883				1,883
Tax effect of stock options exercised	(124)		(124)				(124)
Net income (loss)	30,880			30,759			30,759	121
Other comprehensive income (loss)	(5,919)				(5,919)		(5,919)
Ending balances at Mar. 31, 2015	60,980	$ 2,388	774,432	527,938	(18,728)	$ (1,227,663)	58,367	2,613
Ending balances, shares at Mar. 31, 2015		161,134				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
Stock options exercised	$ 101	$ 1	100				101
Stock options exercised, shares	70	70
Stock compensation expense	$ 1,653		1,653				1,653
Tax effect of stock options exercised	(738)		(738)				(738)
Transactions with non-controlling interest	(535)							(535)
Net income (loss)	(11,779)			(11,776)			(11,776)	(3)
Other comprehensive income (loss)	(1,973)				(1,973)		(1,973)
Ending balances at Mar. 31, 2016	$ (73,639)	$ 2,392	$ 777,720	$ 393,268	$ (19,666)	$ (1,227,663)	$ (73,949)	$ 310
Ending balances, shares at Mar. 31, 2016		161,503				77,765

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Cash Flows [Abstract]
Net income (loss)	$ (11,779)	$ 30,880
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and depletion	17,451	14,920
Amortization	2,827	2,993
Reserve for doubtful accounts	1,878
Write-off and impairment of long-lived assets	76
Inventory reserve adjustment		1,241
(Gain) loss on sale of fixed assets	(112)
Unrealized loss on interest rate swaps		18
Deferred income taxes and taxes payable	(16,139)	262
Stock compensation expense	1,653	1,883
Change in operating assets and liabilities:
Accounts receivable	(9,608)	28,650
Inventories	1,103	14,624
Prepaid expenses and other assets	6,234	3,567
Accounts payable	1,980	(17,255)
Accrued expenses	(4,150)	(4,363)
Net cash provided by (used in) operating activities	(8,586)	77,420
Cash flows from investing activities
Proceeds from sale of fixed assets	588
Capital expenditures	(13,744)	(31,855)
Net cash used in investing activities	(13,156)	(31,855)
Cash flows from financing activities
Payments on long-term debt	(3,128)	(3,128)
Change in other long-term debt and capital leases	(1,724)	(1,479)
Proceeds from option exercises	101	786
Tax effect of stock options exercised and dividend equivalents	(738)	(124)
Distributions to non-controlling interest	(535)
Net cash used in financing activities	(6,024)	(3,945)
Change in cash and cash equivalents related to assets classified as held-for-sale	34
Foreign currency adjustment	118	(171)
Increase (decrease) in cash and cash equivalents	(27,614)	41,449
Cash and cash equivalents:
Beginning of period	171,486	76,923
End of period	$ 143,872	$ 118,372

Significant Accounting Policies

Significant Accounting Policies	3 Months Ended
	Mar. 31, 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. 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

Inventories

Inventories	3 Months Ended
	Mar. 31, 2016
Inventory Disclosure [Abstract]
Inventories	2. Inventories At March 31, 2016 and December 31, 2015, inventories consisted of the following: March 31, 2016 December 31, 2015 Raw materials $ 11,564 $ 10,813 Work-in-process 12,492 14,613 Finished goods 48,314 47,980 72,370 73,406 Less: LIFO reserve (2,978 ) (2,912 ) Inventories $ 69,392 $ 70,494

Property, Plant, and Equipment

Property, Plant, and Equipment	3 Months Ended
	Mar. 31, 2016
Property, Plant and Equipment [Abstract]
Property, Plant, and Equipment	3. Property, Plant, and Equipment At March 31, 2016 and December 31, 2015, property, plant, and equipment consisted of the following: March 31, 2016 December 31, 2015 Land and improvements $ 82,959 $ 82,966 Mineral reserves and mine development 327,044 323,691 Machinery and equipment 580,225 575,034 Buildings and improvements 168,628 171,791 Furniture, fixtures, and other 3,607 3,609 Construction in progress 38,972 37,047 1,201,435 1,194,138 Accumulated depletion and depreciation (339,211 ) (323,141 ) Property, plant, and equipment, net $ 862,224 $ 870,997

Long-Term Debt

Long-Term Debt	3 Months Ended
	Mar. 31, 2016
Debt Disclosure [Abstract]
Long-Term Debt	4. Long-Term Debt At March 31, 2016 and December 31, 2015, long-term debt consisted of the following: March 31, 2016 December 31, 2015 Term B-1 Loans $ 86,309 $ 156,134 Term B-2 Loans 900,278 902,402 Extended Term B-1 Loans 159,491 159,878 2016 Extended Term Loans 69,480 — Industrial Revenue bond 10,000 10,000 Revolving credit facility and other 88 101 Capital leases, net 7,856 9,301 Deferred financing costs, net (13,598 ) (14,710 ) 1,219,904 1,223,106 Less: current portion (100,307 ) (17,385 ) Long-term debt including leases $ 1,119,597 $ 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 (the “Extended 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 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 March 31, 2016, the Company’s leverage ratio was 16.70:1.00. Accordingly, as of March 31, 2016, there was $18,323 available capacity remaining on the Revolving Credit Facility and $12,927 committed to outstanding letters of credit. As of March 31, 2016, the Company has not drawn on the Revolving Credit Facility. 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”). 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 would also be due on the same date. The applicable margin on the interest rate for the Term B-1 Loans, the 2016 Extended Term Loans, and the Term B-2 Loans remained unchanged at 2.5% and the applicable margin on the interest rate for the Term B-1, the 2016 Extended Term, and the Term B-2 Eurodollar loans remained unchanged at 3.5%. 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. Absent this prepayment, the Company would have been obligated to make a 2016 second quarter excess cash flow payment of $39,296 on April 29, 2016. This prepayment effectively accelerated $30,284 of cash payments by the Company. Accrued interest on the extended remainder of the Term B-1 Loan is due at maturity on July 15, 2018. As of March 31, 2016, Term B-1 Loans, Term B-2 Loans, Extended Term B-1 Loans and the borrowings under Revolving Credit Facility had interest rates of 4.2%, 4.5%, 4.5% and 4.3%, respectively. 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 0.48% at March 31, 2016. The bond matures on September 1, 2027 and is collateralized by a letter of credit of $10,000.

Earnings (Loss) per Share

Earnings (Loss) per Share	3 Months Ended
	Mar. 31, 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 months ended March 31, 2016 and 2015: Three Months Ended March 31, 2016 2015 Numerator: Net income (loss) attributable to Fairmount Santrol Holdings Inc. $ (11,776 ) $ 30,759 Denominator: Basic weighted average shares outstanding 161,446 160,949 Dilutive effect of employee stock options, RSU’s, and PRSU’s — 5,382 Diluted weighted average shares outstanding 161,446 166,331 Earnings (loss) per common share - basic $ (0.07 ) $ 0.19 Earnings (loss) per common share - diluted $ (0.07 ) $ 0.18 Because the Company experienced a loss in the three months ended March 31, 2016, 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. The calculation of diluted weighted average shares outstanding for the three months ended March 31, 2015 excludes 6,416 potential common shares because the effect of including these potential common shares would be antidilutive.

Derivative Instruments

Derivative Instruments	3 Months Ended
	Mar. 31, 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 at March 31, 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 March 31, 2016 and December 31, 2015: Assets (Liabilities) Interest Rate Swap Agreements Balance Sheet Classification March 31, 2016 December 31, 2015 Designated as hedges Other long-term liabilities $ (14,845 ) $ (12,107 ) Designated as hedges Other assets — 118 $ (14,845 ) $ (11,989 ) The Company recognized $90 and $16 in interest expense, representing the ineffective portion of interest rate swap agreements designated as hedges, in the three months ended March 31, 2016 and 2015, respectively.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 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 carried 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 value of the Term B-1 Loans, the Extended Term B-1 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 fair value of the Term B-1 Loans was $57,477 and $106,360, the Extended Term B-1 Loans was $81,519 and $76,922, and the Term B-2 Loans was $469,534 and $443,580 at March 31, 2016 and December 31, 2015, respectively. As detailed in Note 4, the inception of the 2016 Extended Term Loans was subsequent to the balance sheet date of March 31, 2016. Accordingly, the fair value of the 2016 Extended Term Loans was $50,793 as of May 4, 2016. The following table present the amounts carried at fair value as of March 31, 2016 and December 31, 2015 for the Company’s other financial instruments. Quoted Prices Other in Active Observable Unobservable Markets Inputs Inputs Recurring Fair Value Measurements (Level 1) (Level 2) (Level 3) Total March 31, 2016 Interest rate swap agreeements $ — $ (14,845 ) $ — $ (14,845 ) $ — $ (14,845 ) $ — $ (14,845 ) December 31, 2015 Interest rate swap agreeements $ — $ (11,989 ) $ — $ (11,989 ) $ — $ (11,989 ) $ — $ (11,989 )

Common Stock and Stock-Based Co

Common Stock and Stock-Based Compensation	3 Months Ended
	Mar. 31, 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 1,532 and 55 shares of common stock in the three months ended March 31, 2016 and 2015, respectively. The average grant date fair value was $2.04 and $3.13 for options issued in the three months ended March 31, 2016 and 2015, respectively. The Company issued restricted stock units (“RSU’s”) of 862 and 6 in the three months ended March 31, 2016 and 2015, respectively. The Company issued performance restricted stock units (“PRSU’s”) of 407 and 0 in the three months ended March 31, 2016 and 2015, respectively. Options Weighted Restricted Weighted Performance Weighted Outstanding at December 31, 2015 16,277 $ 6.28 579 $ 10.45 — $ — Granted 1,532 2.04 862 2.04 407 2.04 Exercised (70 ) 1.43 — — — — Forfeited (224 ) 9.53 (19 ) 11.11 — — Expired (317 ) 7.38 — — — — Outstanding at March 31, 2016 17,198 $ 5.86 1,422 $ 5.34 407 $ 2.04

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 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 March 31, 2016, the Company recorded a tax benefit of $15,754 on loss before income taxes of $27,533. For the three months ended March 31, 2015, the Company recorded tax expense of $10,617 on income before income taxes of $41,497. The effective tax rate for the three months ended March 31, 2016 was 57.2% as compared with 25.6% for the three months ended March 31, 2015. The increase in the effective tax rate compared to the three months ended March 31, 2015 was primarily due to the benefit from a loss carryback.

Defined Benefit Plans

Defined Benefit Plans	3 Months Ended
	Mar. 31, 2016
Compensation and Retirement Disclosure [Abstract]
Defined Benefit Plans	10. Defined Benefit Plans The Company maintained two defined benefit pension plans covering union employees at certain facilities that provide benefits based upon years of service or a combination of employee earnings and length of service. Net periodic benefit cost recognized for other Company defined benefit pension plans for the three months ended March 31, 2016 and 2015 is as follows: Three Months Ended March 31, 2016 2015 Components of net periodic benefit cost Service cost $ 22 27 Interest cost 87 85 Expected return on plan assets (120 ) (127 ) Amortization of prior service cost 4 4 Amortization of net actuarial loss 70 70 Net periodic benefit cost $ 63 $ 59 The Company contributed $25 and $18 during the three months ended March 31, 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)	3 Months Ended
	Mar. 31, 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 March 31, 2016 and December 31, 2015 were as follows: March 31, 2016 Gross Tax Effect Net Amount Foreign currency translation $ (9,883 ) $ 1,033 $ (8,850 ) Additional pension liability (3,940 ) 1,464 (2,476 ) Unrealized gain (loss) on interest rate hedges (13,046 ) 4,706 (8,340 ) $ (26,869 ) $ 7,203 $ (19,666 ) 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 three months ended March 31, 2016: Three Months Ended March 31, 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 (138 ) — (2,984 ) (3,122 ) Amounts reclassified from accumulated other comprehensive income (loss) — 74 1,075 1,149 Ending balance $ (8,850 ) $ (2,476 ) $ (8,340 ) $ (19,666 ) The following table presents the reclassifications out of accumulated other comprehensive income during the three months ended March 31, 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 $ 1,643 Interest expense Tax effect (568 ) Tax $ 1,075 Net of tax Amortization of pension obligations Prior service cost $ 4 Cost of sales Actuarial losses 70 Cost of sales 74 Total before tax Tax effect — Tax expense 74 Net of tax Total reclassifications for the period $ 1,149 Net of tax

Commitments and Contingent Liab

Commitments and Contingent Liabilities	3 Months Ended
	Mar. 31, 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 $17,803 and $16,360 for the three months ended March 31, 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 $56 in the three months ended March 31, 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 our 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.

Transactions with Related Parti

Transactions with Related Parties	3 Months Ended
	Mar. 31, 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 $263 and $44 in the three months ended March 31, 2016 and 2015, respectively.

Segment Reporting

Segment Reporting	3 Months Ended
	Mar. 31, 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. The chief operating decision maker primarily evaluates an operating segment’s performance based on segment contribution margin, which excludes certain corporate costs not associated with the operations of the segment. These corporate costs are separately stated below and include costs that are related to functional areas such as operations management, corporate purchasing, accounting, treasury, information technology, legal and human resources. Three Months Ended 2016 2015 Revenues Proppant Solutions $ 117,463 $ 272,869 Industrial & Recreational Products 27,995 28,621 Total revenues 145,458 301,490 Segment contribution margin Proppant Solutions 12,608 83,819 Industrial & Recreational Products 8,846 7,076 Total segment contribution margin 21,454 90,895 Operating expenses excluded from segment contribution margin Selling, general, and administrative 10,819 15,760 Depreciation, depletion, and amortization 18,586 16,223 Stock compensation expense 1,653 1,883 Corporate restructuring charges and other operating expense (income) 672 224 Interest expense, net 17,262 15,308 Other non-operating expense (income) (5 ) — Income (loss) before provision for income taxes $ (27,533 ) $ 41,497

Restructuring Charges

Restructuring Charges	3 Months Ended
	Mar. 31, 2016
Restructuring and Related Activities [Abstract]
Restructuring Charges	15. Restructuring Charges As a result of challenging conditions in the energy market, the Company has taken actions to adjust its overall operational footprint and reduce selling, general and administrative costs. The restructuring program primarily consists of workforce reductions and idling and closing of surplus facilities. The Company expects to complete these activities prior to the end of 2016, although a continued sustained downturn in the oil and gas market could extend the duration of this restructuring process. A summary of the restructuring costs recognized for the three months ended March 31, 2016 and 2015, respectively, is as follows: Three Months Ended March 31, 2016 2015 Restructuring charges Workforce reduction costs, including one-time severance payments $ — $ 324 Write-down to net realizable value of facilities and other capitalized costs 76 — Total restructuring charges $ 76 $ 324 A summary of the restructuring costs by operating segment is as follows: Three Months Ended March 31, 2016 2015 Restructuring charges Proppant Solutions $ 76 $ — Industrial & Recreational Products — — Corporate — 324 Total restructuring charges $ 76 $ 324 As a result of challenging conditions in the proppant market, the Company has made the decision to sell certain of its operations in the Proppant Solutions segment that it viewed as surplus to its business. These assets are classified as held-for-sale and marked down to their estimated fair values as of March 31, 2016. In April 2016, the Company determined that these assets would no longer be held for sale.

Indefinite-Lived Intangibles -

Indefinite-Lived Intangibles - Goodwill	3 Months Ended
	Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Indefinite-Lived Intangibles - Goodwill	16. Indefinite-Lived Intangibles – Goodwill As of March 31, 2016, the balance of Goodwill was $15,301, which represents goodwill related to acquisitions in the Company’s Industrial & Recreational Products segment. The Company performed a review of qualitative factors and concluded that, as of March 31, 2016, there were no events or changes in circumstances that would more likely than not reduce the fair value of a reporting unit below its carrying value.

Significant Accounting Polici24

Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 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.
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

Inventories (Tables)

Inventories (Tables)	3 Months Ended
	Mar. 31, 2016
Inventory Disclosure [Abstract]
Schedule of Inventories	At March 31, 2016 and December 31, 2015, inventories consisted of the following: March 31, 2016 December 31, 2015 Raw materials $ 11,564 $ 10,813 Work-in-process 12,492 14,613 Finished goods 48,314 47,980 72,370 73,406 Less: LIFO reserve (2,978 ) (2,912 ) Inventories $ 69,392 $ 70,494

Property, Plant, and Equipment

Property, Plant, and Equipment (Tables)	3 Months Ended
	Mar. 31, 2016
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant, and Equipment	At March 31, 2016 and December 31, 2015, property, plant, and equipment consisted of the following: March 31, 2016 December 31, 2015 Land and improvements $ 82,959 $ 82,966 Mineral reserves and mine development 327,044 323,691 Machinery and equipment 580,225 575,034 Buildings and improvements 168,628 171,791 Furniture, fixtures, and other 3,607 3,609 Construction in progress 38,972 37,047 1,201,435 1,194,138 Accumulated depletion and depreciation (339,211 ) (323,141 ) Property, plant, and equipment, net $ 862,224 $ 870,997

Long-Term Debt (Tables)

Long-Term Debt (Tables)	3 Months Ended
	Mar. 31, 2016
Debt Disclosure [Abstract]
Schedule of Long-Term Debt	At March 31, 2016 and December 31, 2015, long-term debt consisted of the following: March 31, 2016 December 31, 2015 Term B-1 Loans $ 86,309 $ 156,134 Term B-2 Loans 900,278 902,402 Extended Term B-1 Loans 159,491 159,878 2016 Extended Term Loans 69,480 — Industrial Revenue bond 10,000 10,000 Revolving credit facility and other 88 101 Capital leases, net 7,856 9,301 Deferred financing costs, net (13,598 ) (14,710 ) 1,219,904 1,223,106 Less: current portion (100,307 ) (17,385 ) Long-term debt including leases $ 1,119,597 $ 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)	3 Months Ended
	Mar. 31, 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 months ended March 31, 2016 and 2015: Three Months Ended March 31, 2016 2015 Numerator: Net income (loss) attributable to Fairmount Santrol Holdings Inc. $ (11,776 ) $ 30,759 Denominator: Basic weighted average shares outstanding 161,446 160,949 Dilutive effect of employee stock options, RSU’s, and PRSU’s — 5,382 Diluted weighted average shares outstanding 161,446 166,331 Earnings (loss) per common share - basic $ (0.07 ) $ 0.19 Earnings (loss) per common share - diluted $ (0.07 ) $ 0.18

Derivative Instruments (Tables)

Derivative Instruments (Tables)	3 Months Ended
	Mar. 31, 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 March 31, 2016 and December 31, 2015: Assets (Liabilities) Interest Rate Swap Agreements Balance Sheet Classification March 31, 2016 December 31, 2015 Designated as hedges Other long-term liabilities $ (14,845 ) $ (12,107 ) Designated as hedges Other assets — 118 $ (14,845 ) $ (11,989 )

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Financial Instruments Carried at Fair Value	The following table present the amounts carried at fair value as of March 31, 2016 and December 31, 2015 for the Company’s other financial instruments. Quoted Prices Other in Active Observable Unobservable Markets Inputs Inputs Recurring Fair Value Measurements (Level 1) (Level 2) (Level 3) Total March 31, 2016 Interest rate swap agreeements $ — $ (14,845 ) $ — $ (14,845 ) $ — $ (14,845 ) $ — $ (14,845 ) December 31, 2015 Interest rate swap agreeements $ — $ (11,989 ) $ — $ (11,989 ) $ — $ (11,989 ) $ — $ (11,989 )

Common Stock and Stock-Based 31

Common Stock and Stock-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 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 1,532 2.04 862 2.04 407 2.04 Exercised (70 ) 1.43 — — — — Forfeited (224 ) 9.53 (19 ) 11.11 — — Expired (317 ) 7.38 — — — — Outstanding at March 31, 2016 17,198 $ 5.86 1,422 $ 5.34 407 $ 2.04

Defined Benefit Plans (Tables)

Defined Benefit Plans (Tables)	3 Months Ended
	Mar. 31, 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 months ended March 31, 2016 and 2015 is as follows: Three Months Ended March 31, 2016 2015 Components of net periodic benefit cost Service cost $ 22 27 Interest cost 87 85 Expected return on plan assets (120 ) (127 ) Amortization of prior service cost 4 4 Amortization of net actuarial loss 70 70 Net periodic benefit cost $ 63 $ 59

Accumulated Other Comprehensi33

Accumulated Other Comprehensive Income (Loss) (Tables)	3 Months Ended
	Mar. 31, 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 March 31, 2016 and December 31, 2015 were as follows: March 31, 2016 Gross Tax Effect Net Amount Foreign currency translation $ (9,883 ) $ 1,033 $ (8,850 ) Additional pension liability (3,940 ) 1,464 (2,476 ) Unrealized gain (loss) on interest rate hedges (13,046 ) 4,706 (8,340 ) $ (26,869 ) $ 7,203 $ (19,666 ) 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 three months ended March 31, 2016: Three Months Ended March 31, 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 (138 ) — (2,984 ) (3,122 ) Amounts reclassified from accumulated other comprehensive income (loss) — 74 1,075 1,149 Ending balance $ (8,850 ) $ (2,476 ) $ (8,340 ) $ (19,666 )
Reclassifications out of Accumulated Comprehensive Income	The following table presents the reclassifications out of accumulated other comprehensive income during the three months ended March 31, 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 $ 1,643 Interest expense Tax effect (568 ) Tax $ 1,075 Net of tax Amortization of pension obligations Prior service cost $ 4 Cost of sales Actuarial losses 70 Cost of sales 74 Total before tax Tax effect — Tax expense 74 Net of tax Total reclassifications for the period $ 1,149 Net of tax

Segment Reporting (Tables)

Segment Reporting (Tables)	3 Months Ended
	Mar. 31, 2016
Segment Reporting [Abstract]
Summarized Financial Information for Reportable Segments	Three Months Ended 2016 2015 Revenues Proppant Solutions $ 117,463 $ 272,869 Industrial & Recreational Products 27,995 28,621 Total revenues 145,458 301,490 Segment contribution margin Proppant Solutions 12,608 83,819 Industrial & Recreational Products 8,846 7,076 Total segment contribution margin 21,454 90,895 Operating expenses excluded from segment contribution margin Selling, general, and administrative 10,819 15,760 Depreciation, depletion, and amortization 18,586 16,223 Stock compensation expense 1,653 1,883 Corporate restructuring charges and other operating expense (income) 672 224 Interest expense, net 17,262 15,308 Other non-operating expense (income) (5 ) — Income (loss) before provision for income taxes $ (27,533 ) $ 41,497

Restructuring Charges (Tables)

Restructuring Charges (Tables)	3 Months Ended
	Mar. 31, 2016
Restructuring and Related Activities [Abstract]
Summary of Restructuring Costs Recognized	A summary of the restructuring costs recognized for the three months ended March 31, 2016 and 2015, respectively, is as follows: Three Months Ended March 31, 2016 2015 Restructuring charges Workforce reduction costs, including one-time severance payments $ — $ 324 Write-down to net realizable value of facilities and other capitalized costs 76 — Total restructuring charges $ 76 $ 324
Summary of Restructuring and Costs by Operating Segment	A summary of the restructuring costs by operating segment is as follows: Three Months Ended March 31, 2016 2015 Restructuring charges Proppant Solutions $ 76 $ — Industrial & Recreational Products — — Corporate — 324 Total restructuring charges $ 76 $ 324

Inventories - Schedule of Inven

Inventories - Schedule of Inventories (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Raw materials	$ 11,564	$ 10,813
Work-in-process	12,492	14,613
Finished goods	48,314	47,980
Inventory gross	72,370	73,406
Less: LIFO reserve	(2,978)	(2,912)
Inventories	$ 69,392	$ 70,494

Property, Plant, and Equipmen37

Property, Plant, and Equipment - Schedule of Property, Plant, and Equipment (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	$ 1,201,435	$ 1,194,138
Accumulated depletion and depreciation	(339,211)	(323,141)
Property, plant, and equipment, net	862,224	870,997
Land and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	82,959	82,966
Mineral Reserves and Mine Development [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	327,044	323,691
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	580,225	575,034
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	168,628	171,791
Furniture, Fixtures and Other [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	3,607	3,609
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	$ 38,972	$ 37,047

Long-Term Debt - Schedule of Lo

Long-Term Debt - Schedule of Long-Term Debt (Detail) - USD ($) $ in Thousands	Mar. 31, 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	7,856	9,301
Deferred financing costs, net	(13,598)	(14,710)
Long term debt	1,219,904	1,223,106
Long term debt	1,219,904	1,223,106
Less: current portion	(100,307)	(17,385)
Long-term debt including leases	1,119,597	1,205,721
Term B-1 Loans [Member]
Debt Instrument [Line Items]
Term Loans	86,309	156,134
Revolving credit facility and other	156,012
Term B-2 Loans [Member]
Debt Instrument [Line Items]
Term Loans	900,278	902,402
Extended Term B-1 Loans [Member]
Debt Instrument [Line Items]
Term Loans	159,491	$ 159,878
2016 Extended Term Loans [Member]
Debt Instrument [Line Items]
Term Loans	69,480
Revolving credit facility and other	$ 156,012

Long-Term Debt - Additional Inf

Long-Term Debt - Additional Information (Detail) - USD ($)	Apr. 28, 2016	Mar. 31, 2016	Sep. 30, 2015	Dec. 31, 2015
Debt Instrument [Line Items]
Applicable margin on interest rate		0.48%
Outstanding term loans		$ 88,000		$ 101,000
Outstanding letters of credit		$ 12,927,000
Debt instrument borrowings, maturity date		Sep. 1, 2027
Excess cash flow payment required to be made during the second quarter of 2016		$ 39,296,000
Accelerated cash payment		30,284,000
Industrial revenue bond outstanding		10,000,000
Letter of credit		10,000,000
Subsequent Event [Member]
Debt Instrument [Line Items]
Prepayment of accrued interest	$ 227,000
Prepayment of principal amount	69,580,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Available capacity remaining on the revolving credit facility		$ 18,323,000
Revolving Credit Facility [Member] | Borrowings [Member]
Debt Instrument [Line Items]
Interest rate of borrowings		4.30%
3/17/2017 [Member]
Debt Instrument [Line Items]
Debt instrument borrowings, maturity date		Mar. 17, 2017
3/17/2017 [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Outstanding term loans	$ 16,723,000
Debt instrument borrowings, maturity date	Mar. 17, 2017
Term B-1 Loans [Member]
Debt Instrument [Line Items]
Outstanding term loans		$ 156,012,000
Term B-1 Loans [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Applicable margin on interest rate		2.50%
Term B-1 Loans [Member] | Base Rate [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Applicable margin on interest rate	2.50%
Term B-1 Loans [Member] | Eurodollar [Member]
Debt Instrument [Line Items]
Applicable margin on interest rate		3.50%
Term B-1 Loans [Member] | Eurodollar [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Applicable margin on interest rate	3.50%
Term B-1 Loans [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate of borrowings		4.20%
Term B-1 Loans [Member] | 3/17/2017 [Member]
Debt Instrument [Line Items]
Outstanding term loans		$ 154,812,000
Term B-2 Loans [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Applicable margin on interest rate		2.50%
Term B-2 Loans [Member] | Base Rate [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Applicable margin on interest rate	2.50%
Term B-2 Loans [Member] | Eurodollar [Member]
Debt Instrument [Line Items]
Applicable margin on interest rate		3.50%
Term B-2 Loans [Member] | Eurodollar [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Applicable margin on interest rate	3.50%
Term B-2 Loans [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate of borrowings		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		16.70%
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
2016 Extended Term Loans [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Debt instrument borrowings, maturity date	Jul. 15, 2018
2016 Extended Term Loans [Member] | Base Rate [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Applicable margin on interest rate	2.50%
2016 Extended Term Loans [Member] | Eurodollar [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Applicable margin on interest rate	3.50%
2016 Extended Term Loans [Member] | 3/17/2017 [Member]
Debt Instrument [Line Items]
Outstanding term loans		$ 16,723,000
Extended Term B-1 Loans [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate of borrowings		4.50%

Long-Term Debt - Summary of Cha

Long-Term Debt - Summary of Change in Maturities of Term Loans (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Due Date	Sep. 1, 2027
Principal Payments	$ 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
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
Term B-1 Loans [Member] | 6/30/2016 [Member]
Debt Instrument [Line Items]
Principal Payments	400
Term B-1 Loans [Member] | 9/30/2016 [Member]
Debt Instrument [Line Items]
Principal Payments	400
Term B-1 Loans [Member] | 12/31/2016 [Member]
Debt Instrument [Line Items]
Principal Payments	400
Term B-1 Loans [Member] | 3/17/2017 [Member]
Debt Instrument [Line Items]
Principal Payments	154,812
2016 Extended Term Loans [Member]
Debt Instrument [Line Items]
Principal Payments	156,012
2016 Extended Term Loans [Member] | 4/28/2016 [Member]
Debt Instrument [Line Items]
Principal Payments	69,580
2016 Extended Term Loans [Member] | 6/30/2016 [Member]
Debt Instrument [Line Items]
Principal Payments	43
2016 Extended Term Loans [Member] | 9/30/2016 [Member]
Debt Instrument [Line Items]
Principal Payments	43
2016 Extended Term Loans [Member] | 12/31/2016 [Member]
Debt Instrument [Line Items]
Principal Payments	43
2016 Extended Term Loans [Member] | 3/17/2017 [Member]
Debt Instrument [Line Items]
Principal Payments	16,723
2016 Extended Term Loans [Member] | 7/15/2018 [Member]
Debt Instrument [Line Items]
Principal Payments	$ 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
	Mar. 31, 2016	Mar. 31, 2015
Numerator:
Net income (loss) attributable to Fairmount Santrol Holdings Inc.	$ (11,776)	$ 30,759
Denominator:
Basic weighted average shares outstanding	161,446,000	160,949,000
Dilutive effect of employee stock options, RSU's, and PRSU's		5,382,000
Diluted weighted average shares outstanding	161,446,000	166,331,000
Earnings (loss) per common share - basic	$ (0.07)	$ 0.19
Earnings (loss) per common share - diluted	$ (0.07)	$ 0.18

Earnings (Loss) per Share - Add

Earnings (Loss) per Share - Additional Information (Detail) shares in Thousands	3 Months Ended
	Mar. 31, 2015shares
Earnings Per Share [Abstract]
Securities excluded from computation of earning per share	6,416

Derivative Instruments - Additi

Derivative Instruments - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Derivative [Line Items]
Interest income (expense)	$ (17,262,000)	$ (15,308,000)
Interest Rate Swap Agreements [Member]
Derivative [Line Items]
Notional amount of swap agreements	525,225,000
Interest income (expense)	$ 90,000	$ 16,000
Interest Rate Swap Agreements [Member] | Minimum [Member]
Derivative [Line Items]
Derivative, minimum variable interest rate	0.83%
Interest rate swap agreement, maturity date	Mar. 15, 2017
Interest Rate Swap Agreements [Member] | Maximum [Member]
Derivative [Line Items]
Derivative, maximum 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	Mar. 31, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Derivative, fair value	$ (14,845)	$ (11,989)
Designated as Hedges [Member] | Other Long-Term Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ (14,845)	(12,107)
Designated as Hedges [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets		$ 118

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Thousands	May. 04, 2016	Mar. 31, 2016	Dec. 31, 2015
2016 Extended Term Loans [Member] | Subsequent Event [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of long term debt	$ 50,793
Quoted Prices in Active Markets (Level 1) [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		$ 57,477	$ 106,360
Quoted Prices in Active Markets (Level 1) [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		81,519	76,922
Quoted Prices in Active Markets (Level 1) [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		$ 469,534	$ 443,580

Fair Value Measurements - Finan

Fair Value Measurements - Financial Instruments Carried at Fair Value (Detail) - USD ($) $ in Thousands	Mar. 31, 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	$ (14,845)	$ (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)	(14,845)	(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	(14,845)	(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)	(14,845)	(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	$ (14,845)	$ (11,989)

Common Stock and Stock Based Co

Common Stock and Stock Based Compensation - Additional Information (Detail) - $ / shares shares in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted to purchase	1,532	55
Average grant date fair value of options issued	$ 2.04	$ 3.13
Performance restricted stock units issued	862	6
Performance Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance restricted stock units issued	407	0

Common Stock and Stock Based 48

Common Stock and Stock Based Compensation - Summary of Share Based Compensation Activity of Option and Non-option Instruments (Detail) shares in Thousands	3 Months Ended
	Mar. 31, 2016$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, Outstanding Beginning Balance | shares	16,277
Options, Granted | shares	1,532
Options, Exercised | shares	70
Options, Forfeited | shares	(224)
Options, Expired | shares	317
Options, Outstanding Ending Balance | shares	17,198
Weighted Average Exercise Price, Option, Outstanding Beginning Balance | $ / shares	$ 6.28
Weighted Average Exercise Price, Option, Granted | $ / shares	2.04
Weighted Average Exercise Price, Option, Exercised | $ / shares	1.43
Weighted Average Exercise Price, Option, Forfeited | $ / shares	9.53
Weighted Average Exercise Price, Option, Expired | $ / shares	7.38
Weighted Average Exercise Price, Option, Outstanding Ending Balance | $ / shares	$ 5.86
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance Restricted Stock Units, Outstanding Beginning Balance | shares	579
Performance Restricted Stock Units, Granted | shares	862
Options, Forfeited | shares	(19)
Performance Restricted Stock Units, Outstanding Ending Balance | shares	1,422
Weighted Average Price at PRSU Issue Date, Outstanding Beginning Balance | $ / shares	$ 10.45
Weighted Average Price at PRSU Issue Date, Granted | $ / shares	2.04
Weighted Average Price at PRSU Issue Date, Forfeited | $ / shares	11.11
Weighted Average Price at PRSU Issue Date, Outstanding Ending Balance | $ / shares	$ 5.34
Performance Restricted Stock Units PRSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance Restricted Stock Units, Granted | shares	407
Performance Restricted Stock Units, Outstanding Ending Balance | shares	407
Weighted Average Price at PRSU Issue Date, Granted | $ / shares	$ 2.04
Weighted Average Price at PRSU Issue Date, Outstanding Ending Balance | $ / shares	$ 2.04

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Provision (benefit) for income taxes	$ (15,754)	$ 10,617
Income (Loss) before income taxes	$ (27,533)	$ 41,497
Effective income tax rate	57.20%	25.60%

Defined Benefit Plans - Additio

Defined Benefit Plans - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)Pension_Plan	Mar. 31, 2015USD ($)
Compensation and Retirement Disclosure [Abstract]
Number of defined benefit pension plans | Pension_Plan	2
Pension and postretirement contributions	$ 25	$ 18
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
	Mar. 31, 2016	Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Service cost	$ 22	$ 27
Interest cost	87	85
Expected return on plan assets	(120)	(127)
Amortization of prior service cost	4	4
Amortization of net actuarial loss	70	70
Net periodic benefit cost	$ 63	$ 59

Accumulated Other Comprehensi52

Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), Gross	$ (26,869)	$ (24,172)
Accumulated other comprehensive income (loss), Tax Effect	7,203	6,479
Accumulated other comprehensive income (loss)	(19,666)	(17,693)
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), Gross	(9,883)	(10,030)
Accumulated other comprehensive income (loss), Tax Effect	1,033	1,318
Accumulated other comprehensive income (loss)	(8,850)	(8,712)
Additional Pension Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), Gross	(3,940)	(4,014)
Accumulated other comprehensive income (loss), Tax Effect	1,464	1,464
Accumulated other comprehensive income (loss)	(2,476)	(2,550)
Unrealized Gain (Loss) on Interest Rate Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), Gross	(13,046)	(10,128)
Accumulated other comprehensive income (loss), Tax Effect	4,706	3,697
Accumulated other comprehensive income (loss)	$ (8,340)	$ (6,431)

Accumulated Other Comprehensi53

Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income by Component (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (17,693)
Other comprehensive income (loss) before reclassifications	(3,122)
Amounts reclassified from accumulated other comprehensive income (loss)	1,149
Ending balance	(19,666)
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(8,712)
Other comprehensive income (loss) before reclassifications	(138)
Ending balance	(8,850)
Additional Pension Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(2,550)
Amounts reclassified from accumulated other comprehensive income (loss)	74
Ending balance	(2,476)
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	(2,984)
Amounts reclassified from accumulated other comprehensive income (loss)	1,075
Ending balance	$ (8,340)

Accumulated Other Comprehensi54

Accumulated Other Comprehensive Income (Loss) - Reclassifications out of Accumulated Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	$ (27,533)	$ 41,497
Tax expense (benefit)	(15,754)	10,617
Net of tax	(11,779)	30,880
Cost of sales	118,464	$ 202,548
Reclassification Out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net of tax	1,149
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	1,643
Tax expense (benefit)	(568)
Net of tax	1,075
Reclassification Out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment, Net Prior Service Cost (Credit) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	4
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	70
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	74
Net of tax	$ 74

Commitments and Contingent Li55

Commitments and Contingent Liabilities - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 17, 2015	Mar. 31, 2016	Mar. 31, 2015
Commitments and Contingencies [Line Items]
Rent expense for lease		$ 17,803	$ 16,360
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		$ 56

Transactions with Related Par56

Transactions with Related Parties - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Purchases from an affiliated entity	$ 263	$ 44

Segment Reporting - Additional

Segment Reporting - Additional Information (Detail)	3 Months Ended
	Mar. 31, 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
	Mar. 31, 2016	Mar. 31, 2015
Revenues
Revenues	$ 145,458	$ 301,490
Operating expenses excluded from segment contribution margin
Selling, general, and administrative	16,625	24,020
Depreciation, depletion, and amortization	18,586	16,223
Stock compensation expense	1,653	1,883
Interest expense, net	17,262	15,308
Other non-operating expense (income)	5
Income (loss) before provision for income taxes	(27,533)	41,497
Operating Segments [Member]
Revenues
Revenues	145,458	301,490
Segment contribution margin
Segment contribution margin	21,454	90,895
Operating Segments [Member] | Proppant Solutions [Member]
Revenues
Revenues	117,463	272,869
Segment contribution margin
Segment contribution margin	12,608	83,819
Operating Segments [Member] | Industrial & Recreational Products [Member]
Revenues
Revenues	27,995	28,621
Segment contribution margin
Segment contribution margin	8,846	7,076
Corporate, Non-Segment [Member]
Operating expenses excluded from segment contribution margin
Selling, general, and administrative	10,819	15,760
Depreciation, depletion, and amortization	18,586	16,223
Stock compensation expense	1,653	1,883
Corporate restructuring charges and other operating expense (income)	672	224
Interest expense, net	17,262	$ 15,308
Other non-operating expense (income)	$ (5)

Restructuring Charges - Summary

Restructuring Charges - Summary of Restructuring Costs Recognized (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Restructuring charges
Workforce reduction costs, including one-time severance payments		$ 324
Write-down to net realizable value of facilities and other capitalized costs	$ 76
Total restructuring charges	$ 76	$ 324

Restructuring Charges - Summa60

Restructuring Charges - Summary of Restructuring Costs by Operating Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 76	$ 324
Operating Segments [Member] | Proppant Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 76
Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring charges		$ 324

Restructuring Charges - Additio

Restructuring Charges - Additional Information (Detail)	Apr. 30, 2016USD ($)
Subsequent Event [Member]
Restructuring Cost and Reserve [Line Items]
Assets held for sale	$ 0

Indefinite-Lived Intangibles 62

Indefinite-Lived Intangibles - Goodwill - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Goodwill [Line Items]
Goodwill	$ 15,301	$ 15,301
Industrial & Recreational Products [Member]
Goodwill [Line Items]
Goodwill	$ 15,301