Bison Merger Sub I (FMSA) 10-K 31 Mar 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2014	Mar. 17, 2015	Jun. 30, 2014
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Trading Symbol	FMSA
Entity Registrant Name	FMSA HOLDINGS INC.
Entity Central Index Key	1010858
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		160,929,766
Entity Public Float			$0

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Revenue	$1,356,458	$988,386	$885,190
Cost of sales (excluding depreciation, depletion, amortization, and stock compensation expense shown separately)	851,454	627,842	502,417
Operating expenses
Selling, general and administrative expenses	114,227	81,858	65,430
Depreciation, depletion, and amortization expense	59,379	37,771	27,690
Stock compensation expense	16,571	10,133	11,434
Other operating expense (income)	3,163	2,826	-207
Income from operations	311,664	227,956	278,426
Interest expense, net	60,842	61,926	56,714
Loss on extinguishment of debt		11,760
Other non-operating expense	2,786	4,394	1,870
Income before provision for income taxes	248,036	149,876	219,842
Provision for income taxes	77,413	45,219	70,369
Net income	170,623	104,657	149,473
Less: Net income attributable to the noncontrolling interest	173	696	587
Net income attributable to FMSA Holdings Inc.	$170,450	$103,961	$148,886
Earnings per share
Basic	$1.08	$0.67	$0.96
Diluted	$1.03	$0.63	$0.91
Weighted average number of shares outstanding
Basic	157,949,664	156,008,218	155,826,794
Diluted	166,277,124	164,637,554	164,328,324

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net income	$170,623	$104,657	$149,473
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	-2,353	-2	308
Pension obligations	-950	914	166
Change in fair value of derivative swap agreements	-5,970	4,751	-643
Total other comprehensive income (loss), net of tax	-9,273	5,663	-169
Comprehensive income	161,350	110,320	149,304
Comprehensive income attributable to the noncontrolling interest	173	696	791
Comprehensive income attributable to FMSA Holdings Inc.	$161,177	$109,624	$148,513

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets
Cash and cash equivalents	$76,923	$17,815
Accounts receivable, net	206,094	139,688
Inventories	131,613	118,349
Deferred income taxes	5,158	11,748
Prepaid expenses and other assets	40,766	17,738
Total current assets	460,554	305,338
Property, plant and equipment, net	841,274	748,838
Goodwill	84,677	87,452
Intangibles, net	100,769	106,236
Other assets	26,742	35,567
Total assets	1,514,016	1,283,431
Current liabilities
Current portion of long-term debt	17,274	15,687
Accounts payable	88,542	89,998
Accrued expenses	36,025	28,706
Total current liabilities	141,841	134,391
Long-term debt	1,235,365	1,246,459
Deferred income taxes	74,351	46,851
Other long-term liabilities	28,985	21,088
Total liabilities	1,480,542	1,448,789
Commitments and contingent liabilities
Common stock: $0.01 par value, 272,000,000 authorized shares Shares outstanding: 160,913,266 and 156,462,356 at December 31, 2014 and December 31, 2013, respectively	2,387	2,341
Preferred stock: $0.01 par value, 100,000,000 authorized shares Shares outstanding: 0 at December 31, 2014 and 2013, respectively
Additional paid-in capital	771,888	733,088
Retained earnings	497,179	326,729
Accumulated other comprehensive income (loss)	-12,809	-3,536
Total equity attributable to FMSA Holdings Inc. before treasury stock	1,258,645	1,058,622
Less: Treasury stock at cost Shares in treasury: 77,765,480 and 77,706,150 at December 31, 2014 and December 31, 2013, respectively	-1,227,663	-1,227,001
Total equity (deficit) attributable to FMSA Holdings Inc.	30,982	-168,379
Noncontrolling interest	2,492	3,021
Total equity (deficit)	33,474	-165,358
Total liabilities and equity	$1,514,016	$1,283,431

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	272,000,000	272,000,000
Common stock, shares outstanding	160,913,266	156,462,356
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	77,765,480	77,706,150

Consolidated_Statements_of_Equ

Consolidated Statements of Equity (USD $)	Total	Common Stock [Member]	Preferred Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Subtotal [Member]	Non-controlling Interest [Member]
In Thousands, except Share data
Beginning balances at Dec. 31, 2011	($447,992)	$2,331	$0	$705,849	$73,882	($8,826)	($1,224,285)	($451,049)	$3,057
Beginning balances, shares at Dec. 31, 2011		155,669,000	0				77,453,000
Purchase of treasury stock	-1,014						-1,014	-1,014
Purchase of treasury stock, shares		-93,000					93,000
Stock options exercised	716	3		713				716
Stock options exercised, shares		301,000
Stock compensation expense	11,434			11,434				11,434
Tax effect of stock options exercised	901			901				901
Tax effect for deferred shareholder payments	961			961				961
Purchase of noncontrolling interest	-238								-238
Net income	149,473				148,886			148,886	587
Other comprehensive income (loss)	-169					-373		-373	204
Ending balances at Dec. 31, 2012	-285,928	2,334	0	719,858	222,768	-9,199	-1,225,299	-289,538	3,610
Ending balances, shares at Dec. 31, 2012		155,877,000	0				77,546,000
Purchase of treasury stock	-1,702						-1,702	-1,702
Purchase of treasury stock, shares		-160,000					160,000
Stock options exercised	1,277	7		1,270				1,277
Stock options exercised, shares		745,000
Stock compensation expense	10,133			10,133				10,133
Tax effect of stock options exercised	1,827			1,827				1,827
Transactions with noncontrolling interest	-1,285								-1,285
Net income	104,657				103,961			103,961	696
Other comprehensive income (loss)	5,663					5,663		5,663
Ending balances at Dec. 31, 2013	-165,358	2,341	0	733,088	326,729	-3,536	-1,227,001	-168,379	3,021
Ending balances, shares at Dec. 31, 2013		156,462,000	0				77,706,000
Purchase of treasury stock	-662						-662	-662
Purchase of treasury stock, shares		-59,000					59,000
Stock options exercised	6,540	46		6,494				6,540
Stock options exercised, shares	4,677,788	4,510,000
Stock compensation expense	16,571			16,571				16,571
Tax effect of stock options exercised	15,735			15,735				15,735
Transactions with noncontrolling interest	-702								-702
Net income	170,623				170,450			170,450	173
Other comprehensive income (loss)	-9,273					-9,273		-9,273
Ending balances at Dec. 31, 2014	$33,474	$2,387	$0	$771,888	$497,179	($12,809)	($1,227,663)	$30,982	$2,492
Ending balances, shares at Dec. 31, 2014		160,913,000	0				77,765,000

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Cash Flows [Abstract]
Net income	$170,623	$104,657	$149,473
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and depletion	54,111	35,917	27,562
Amortization	11,991	8,446	6,743
Write-off of deferred financing costs		11,358
Write-off and impairment of intangibles and long-lived assets	200		273
Loss on sale of fixed assets	854
Unrealized loss (gain) on interest rate swaps	208	3,009	-123
Deferred income taxes	37,810	826	10,085
Stock compensation expense	16,571	10,133	11,434
Change in operating assets and liabilities, net of acquired balances:
Accounts receivable	-66,406	-22,097	-2,172
Inventories	-13,264	158	4,502
Prepaid expenses and other assets	-23,454	-11,698	-4,067
Accounts payable	-1,456	46,542	-14,263
Accrued expenses	17,488	-12,616	-3,014
Net cash provided by operating activities	205,276	174,635	186,433
Cash flows from investing activities
Proceeds from sale of fixed assets	5,160		1,650
Capital expenditures	-143,491	-111,514	-109,016
Purchase of business and assets		-468,003
Net cash used in investing activities	-138,331	-579,517	-107,366
Cash flows from financing activities
Proceeds from issuance of term loans	41,000	1,226,950
Payments on term debt	-12,512	-841,025	-115,000
Change in other long-term debt and capital leases	-4,830	-2,356	-5,634
Proceeds from borrowing on revolving credit facility	32,267	148,100
Payments on revolving credit facility	-73,000	-107,100
Settlement of contingent consideration	-9,600
Proceeds from option exercises	6,540	1,277	716
Purchase of treasury stock	-662	-1,702	-1,014
Tax effect of stock options exercised and dividend equivalents	15,735	1,827	901
Distributions to noncontrolling interest	-702	-1,285
Tax effect of deferred shareholder payments			961
Financing costs	-1,913	-14,171
Net cash provided by (used in) financing activities	-7,677	410,515	-119,070
Foreign currency adjustment	-160	316	104
Increase (decrease) in cash and cash equivalents	59,108	5,949	-39,899
Cash and cash equivalents:
Beginning of period	17,815	11,866	51,765
End of period	76,923	17,815	11,866
Supplemental disclosure of cash flow information:
Interest paid	62,167	57,694	52,047
Income taxes paid	32,203	56,319	55,085
Non-cash investing activities:
Equipment purchased under capital lease	$6,558	$5,989	$4,381

Organization

Organization	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Organization	1	Organization
	FMSA Holdings Inc. and its consolidated subsidiaries (the “Company”) is a supplier of proppants and sand products. The Company is organized into two segments: Proppant Solutions and Industrial & Recreational Products. This segmentation is based on the end markets we serve, our management structure and the financial information that is reviewed by the chief operating decision maker in deciding how to allocate resources and assess performance.
	The Proppant Solutions business serves the oil and gas recovery markets in the United States, Canada, Argentina, Mexico, China, northern Europe and the United Arab Emirates, providing raw and coated proppants primarily for use in hydraulic fracturing. The raw sand and substrate for our coated sand generally consists of high-purity silica sands produced at our facilities in Illinois, Wisconsin, Minnesota, Missouri and Texas.
	The Industrial & Recreational Products business provides raw and coated sands to the foundry, building products, glass, turf and landscape and filtration industries.
	In addition to its wholly-owned subsidiaries, the Company owns 90% of a holding company, Technimat LLC, which owns 70% of Santrol (Yixing) Proppant Co., a manufacturer of resin-based proppants located in China. During 2013, the company liquidated its interest in Santrol (Tianjin) Proppant Company Ltd., which was owned by Technimat. The noncontrolling interests in both entities are presented as “Noncontrolling interest” on the balance sheet.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2	Summary of Significant Accounting Policies
	Principles of Consolidation
	The consolidated financial statements include the accounts of FMSA Holdings Inc. and its wholly-owned and majority-owned subsidiaries (collectively, the “Company”). All significant intercompany balances and transactions have been eliminated in consolidation.
	Use of Estimates
	The preparation of financial statements in conformity with generally accepted accounting principles 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.
	Revenue Recognition
	Revenue is recognized when delivery of products has occurred, the selling price is fixed or determinable, collectability is reasonably assured and title and risk of loss have transferred to the customer. This generally occurs when products leave a storage terminal or, in the case of direct shipments, when products leave a production facility. In a majority of cases, transportation costs to move product from a production facility to a storage terminal are borne by the Company and capitalized into the cost of inventory. These costs are included in the cost of sales as the product is sold.
	The Company derives its revenue by mining and processing minerals that its customers purchase for various uses. Its net sales are primarily a function of the price per ton realized and the volumes sold. In a small number of instances, its net sales also include a charge for transportation services it provides to its customers.
	In the Proppant Solutions segment, the Company primarily sells its products under market rate contracts with terms typically ranging from two to ten years. The Company invoices the majority of its customers on a per shipment basis when the customer takes possession of the product.
	Cash and Cash Equivalents
	The Company considers all highly liquid debt instruments purchased with a maturity of three months or less to be cash equivalents. At various times, the Company maintains funds on deposit at its banks in excess of FDIC insurance limits.
	Accounts Receivable
	Trade accounts receivable are stated at the amount management expects to collect, and do not bear interest. Management provides for uncollectible amounts based on its assessment of the current status of individual accounts. Accounts receivable are net of allowance for doubtful accounts of $4,255 and $796 as of December 31, 2014 and 2013, respectively.
	Inventories
	Inventories are stated at the lower of cost or market. Certain subsidiaries determine cost using the last-in, first-out (LIFO) method. If the first-in, first-out (FIFO) method of inventory accounting had been used, inventories would have been higher by $2,960 and $176 at December 31, 2014 and 2013, respectively.
	LIFO inventories comprise 16% and 24% of inventories reflected in the accompanying Consolidated Balance Sheets as of December 31, 2014 and 2013, respectively. The cost of inventories of all other subsidiaries is determined using the FIFO method. In 2013, the Company recognized $4,958 permanent write-down in the value of finished goods inventory, net of expected recoveries from suppliers. The inventory write-down is included in cost of sales. In the year ended December 31, 2014, the Company recorded a write-down of $908 of certain field trial inventory, which is included in other operating expense.
	Property, Plant and Equipment
	Property, plant and equipment are stated at cost. Expenditures, including interest, for property, plant and equipment and items that substantially increase the useful lives of existing assets are capitalized, while expenditures for repairs and maintenance are expensed as incurred.
	Depreciation on property, plant and equipment is computed on a straight-line basis over the estimated useful lives of the related assets. Amortization of leasehold improvements is computed using the straight-line method over the shorter of the remaining lease term or the estimated useful lives of the improvements.
	Depletion expense calculated for depletable land and mineral rights is based on cost multiplied by a depletion factor. The depletion factor varies based on production and other factors, but is generally equal to annual tons mined divided by total estimated remaining reserves for the mine.
	The estimated service lives of property and equipment are principally as follows:
	Land improvements			10-40 years
	Machinery and equipment			3-20 years
	Buildings and improvements			10-40 years
	Furniture, fixtures, and other			3-10 years
	Construction in progress is stated at cost, which includes the cost of construction and other direct costs attributable to the construction. No provision for depreciation is made on construction in progress until such time as the relevant assets are completed and put into use. Construction in progress at December 31, 2014, represents machinery and facilities under installation.
	The Company capitalizes interest cost incurred on funds used to construct property, plant, and equipment. The capitalized interest is recorded as part of the asset to which it relates and is amortized over the asset’s estimated useful life. Interest cost capitalized was $6,765 and $2,540 in 2014 and 2013, respectively.
	Depreciation and depletion expense was $54,111, $35,917, and $27,562 in years ended December 31, 2014, 2013, and 2012, respectively.
	Included in land and improvements are occupancy rights in China of $354 that are held for a term of 50 years until December 2057.
	The Company reviews property, plant and equipment for impairment whenever events or changes in circumstances indicate that the carrying amount of property, plant and equipment may not be recoverable from the estimated future cash flows expected to result from its use and eventual disposition. In cases where undiscounted expected future cash flows are less than the carrying value, an impairment loss is recognized equal to an amount by which the carrying value exceeds the fair value of assets or asset groups. The factors considered by management in performing this assessment include current operating results, trends, and prospects, as well as the effects of obsolescence, demand, competition, and other economic factors. As a result of these tests, the Company did not record a write down in the carrying value of certain minerals rights in the years ended December 31, 2014 and 2013, but the Company did record a write-down of $273 in the year ended December 31, 2012.
	Deferred Financing Costs
	Deferred financing costs are amortized over the terms of the related debt obligations and are included in other assets. In connection with the refinancing of the Company’s debt in September 2013 (see note 10), the Company incurred financing costs of $15,132 of which $14,171 were capitalized. In connection with the refinancing, the Company wrote off $11,358 of costs that were previously capitalized. In 2014, the Company incurred additional deferred financing charges in connection with the amendment of the existing credit agreement whereby the applicable margin for B-1 and B-2 base rate and Eurodollar loans was reduced (refer to note 10).
	The following table presents deferred financing costs as of December 31, 2014 and 2013:
			2014			2013
	Deferred financing costs		$	37,936		$	36,705
	Accumulated amortization			(17,510	)		(12,475	)
	Deferred financing costs, net		$	20,426		$	24,230
	Goodwill and Intangible Assets
	Goodwill and indefinite-lived intangible assets are reviewed for impairment by applying a fair-value based test on an annual basis or more frequently if circumstances indicate that impairment may have occurred. The Company evaluates qualitative factors such as economic performance, industry conditions, and other factors to determine if it is more-likely-than-not that the fair value of the reporting unit is less than its carrying amount. As a result of this evaluation at December 31, 2014, the Company performed a quantitative two-step impairment test. The first step of the goodwill impairment test, used to identify potential impairment, compares the fair value of a reporting unit with its carrying amount, including goodwill. If the carrying amount of a reporting unit exceeds its fair value, an indication of goodwill impairment exists. The second step of the goodwill impairment test is performed to measure the amount of the impairment loss, if any. If the carrying amount of goodwill exceeds its implied fair value, an impairment loss is recognized equal to the excess. The implied fair value of goodwill is determined by allocating the fair value of the reporting unit in a manner similar to a purchase price allocation, and the residual fair value after this allocation is the implied fair value of the reporting unit goodwill.
	The Company reviews definite-lived intangible assets for impairment whenever events or changes in circumstances indicate that the carrying amount of a definite-lived intangible asset may not be recoverable from the estimated future cash flows expected to result from its use and eventual disposition. In cases where undiscounted expected future cash flows are less than the carrying value, an impairment loss is recognized equal to an amount by which the carrying value exceeds the fair value of the assets or asset groups.
	The evaluation of goodwill or other intangible assets for possible impairment includes estimating fair value using one or a combination of valuation techniques, such as discounted cash flows or based on comparable companies or transactions. These valuations require the Company to make estimates and assumptions regarding future operating results, cash flows, changes in working capital and capital expenditures, selling prices, profitability, and the cost of capital. Although the Company believes its assumptions and estimates are reasonable, deviations from the assumptions and estimates could produce a materially different result.
	The Company did not recognize any impairment losses for goodwill or other intangible assets in the years ended December 31, 2014, 2013, and 2012.
	Earnings per Share
	Basic and diluted earnings per share is presented for net income attributable to FMSA Holdings Inc. Basic earnings per share is computed by dividing income available to FMSA Holdings Inc. common stockholders by the weighted-average number of outstanding common shares for the period. Diluted earnings per share iscomputed by increasing the weighted-average number of outstanding common shares to include the additional common shares that would be outstanding after exercise of outstanding stock options and restricted stock units. Potential common shares in the diluted earnings per share calculation are excluded to the extent that they would be anti-dilutive.
	Derivatives and Hedging Activities
	Due to its variable-rate indebtedness, the Company is exposed to fluctuations in interest rates. The Company uses interest rate swaps to manage this exposure. These 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 during 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.
	Foreign Currency Translation
	Assets and liabilities of all foreign operations are translated at the rate of exchange in effect on the balance sheet date; income and expenses are translated at the average rates of exchange prevailing during the year. The related translation adjustments are reflected as accumulated other comprehensive income (loss) in equity.
	Concentration of Labor
	Approximately 12% of the Company’s domestic labor force is covered under six union agreements that expire at various times through November 2016. None of the contracts expire before March 2015.
	Concentration of Credit Risk
	At December 31, 2014, we had two customers whose receivable balances exceeded 10% of our total receivables. Approximately, 21% and 18% of the accounts receivable balance are from these two customers, respectively. At December 31, 2013, we had three customers whose receivable balances exceeded 10% of our total receivables. Approximately 20%, 13%, and 11% of the accounts receivable balance are from these three customers, respectively.
	Income Taxes
	The Company uses the asset and liability method to account for deferred income taxes. Deferred tax assets and liabilities are recognized for the anticipated future tax consequences attributable to differences between financial statement amounts and their respective tax bases. Management reviews the Company’s deferred tax assets to determine whether their value can be realized based upon available evidence. A valuation allowance is established if management believes it is more likely than not that some portion of the deferred tax assets will not be realized.
	Changes in valuation allowances from period to period are included in the Company’s tax provision in the period of change.
	The Company recognizes a tax benefit associated with an uncertain tax position when the tax position is more-likely-than-not to be sustained upon examination by taxing authorities. The amount recognized is measured as the amount of benefit that is greater than 50% likely of being realized upon ultimate settlement. The Company recognizes interest and penalties accrued related to unrecognized tax uncertainties in income tax expense.
	Asset Retirement Obligations
	We estimate the future cost of dismantling, restoring and reclaiming operating excavation sites and related facilities in accordance with federal, state and local regulatory requirements. We record the initial estimated present value of reclamation costs as an asset retirement obligation and increase the carrying amount of the related asset by a corresponding amount. We allocate reclamation costs to expense over the life of the related assets and adjust the related liability for changes resulting from the passage of time and revisions to either the timing or amount of the original present value estimate. If the asset retirement obligation is settled for more or less than the carrying amount of the liability, a loss or gain will be recognized, respectively.
	Research and Development (R&D)
	The Company’s research and development expenses consist of personnel and other direct and indirect costs for internally funded project development. Total expenses for R&D for the years ended December 31, 2014, 2013, and 2012 were $6,286, $5,364, and $1,815, respectively. Total research and development expenditures represented 0.46%, 0.54%, and 0.21% of revenues in 2014, 2013, and 2012, respectively.
	Change in Classification
	During the current year the Company modified the presentation of certain recoverable value-added taxes and other taxes remitted in Mexico to more appropriately reflect the nature of the underlying tax-related receivables. Comparative amounts in the consolidated balance sheets were reclassified for consistency, which resulted in $7,163 being reclassified from accounts receivable, net to prepaid expenses and other assets as of December 31, 2013. Since the reclassification is entirely within current assets, there is no net effect on current and long-term assets.
	The consolidated statements of cash flows were also modified to reflect the reclassification and resulted in $1,366 and $1,332 being reclassified from the change in accounts receivable to the change in prepaids and other assets for the years ended December 31, 2013 and 2012, respectively. There was no net effect to cash flows provided by operating activities for either period.
Accumulated Other Comprehensive Income (Loss)
Accumulated other comprehensive income (loss) is a separate line within equity that reports the Company’s cumulative income that has not been reported as part of net income. Items that are included in this line are the income or loss from foreign currency translation, actuarial gains and losses and prior service cost related to pension liabilities, and the unrealized gains and losses on certain investments or hedges, net of taxes. The components of accumulated other comprehensive income (loss) attributable to FMSA Holdings Inc. at December 31, 2014 and 2013 were as follows:
		December 31, 2014
		Gross			Tax Effect			Net Amount
Foreign currency translation		$	(4,979	)	$	—		$	(4,979	)
Additional pension liability			(4,236	)		1,588			(2,648	)
Unrealized loss on interest rate hedges			(8,292	)		3,110			(5,182	)
		$	(17,507	)	$	4,698		$	(12,809	)
		31-Dec-13
		Gross			Tax Effect			Net Amount
Foreign currency translation		$	(2,626	)	$	—		$	(2,626	)
Additional pension liability			(2,717	)		1,019			(1,698	)
Unrealized gain on interest rate hedges			1,260			(472	)		788
		$	(4,083	)	$	547		$	(3,536	)
The following table presents the changes in accumulated other comprehensive income by component for the year ended December 31, 2014:
		Year Ended December 31, 2014
		Unrealized			Additional			Foreign			Total
		gain (loss) on			pension			currency
		interest rate			liability			translation
		hedges
Beginning balance		$	788		$	(1,698	)	$	(2,626	)	$	(3,536	)
Other comprehensive income (loss) before reclassifications			(7,609	)		(1,062	)		(2,353	)		(11,024	)
Amounts reclassified from accumulated other comprehensive income			1,639			112			—			1,751
Ending balance		$	(5,182	)	$	(2,648	)	$	(4,979	)	$	(12,809	)
The following table presents the reclassifications out of accumulated comprehensive income during the year ended December 31, 2014:
Details about accumulated other comprehensive income		Amount reclassified			Affected line item on the
		from accumulated
		other comprehensive			statement of income
		income
Change in fair value of derivative swap agreements
Interest rate hedging contracts		$	2,623		Interest expense
Tax effect			(984	)	Tax expense (benefit)
		$	1,639		Net of tax
Amortization of pension obligations
Prior service cost		$	16		Cost of sales
Actuarial losses			164		Cost of sales
			180		Total before tax
Tax effect			(68	)	Tax expense
		$	112		Net of tax
Total reclassifications for the period		$	1,751		Net of tax

Recent_Accounting_Pronouncemen

Recent Accounting Pronouncements	12 Months Ended
	Dec. 31, 2014
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	3	Recent Accounting Pronouncements
	In May 2014, the FASB issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (ASU 2014-09). Under ASU 2014-09, companies recognize revenue in a manner that depicts the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled, in exchange for those goods or services. Additionally, the guidance requires improved disclosures to help users of financial statements better understand the nature, amount, timing, and uncertainty of revenue that is recognized. The guidance is effective for reporting periods beginning after December 15, 2016. The Company is in the process of evaluating the effect of the new guidance on its financial statements and disclosures.
	On February 18, 2015, the FASB issued Accounting Standards Update No. 2015-02 – Consolidation (Topic 810). The amendments in this Update affect reporting entities that are required to evaluate whether they should consolidate certain legal entities. The amendments modify the evaluation of whether certain limited partnerships and similar entities are variable interest entities (VIEs) or voting interest entities, impact the consolidation analysis of VIEs, and provide an exception for certain registered money market funds. The Company does not have any unconsolidated or consolidated legal entities impacted by this amendment.

Inventories

Inventories	12 Months Ended
	Dec. 31, 2014
Inventory Disclosure [Abstract]
Inventories	4	Inventories
	At December 31, 2014 and 2013, inventories consisted of the following:
			2014			2013
	Raw materials		$	19,803		$	16,766
	Work-in-process			23,568			24,576
	Finished goods			91,202			77,183
				134,573			118,525
	Less: LIFO reserve			(2,960	)		(176	)
	Inventories		$	131,613		$	118,349
	Inventories include raw stockpiles of silica and other industrial sand available for shipment, as well as supplies for routine facilities maintenance. We value inventory at the lower of cost or market.

Property_Plant_and_Equipment

Property, Plant, and Equipment	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Property, Plant, and Equipment	5	Property, Plant, and Equipment
	At December 31, 2014 and 2013, property, plant and equipment consisted of the following:
			2014			2013
	Land and improvements		$	63,800		$	38,557
	Mineral reserves and mine development			303,804			280,727
	Machinery and equipment			478,225			426,798
	Buildings and improvements			146,165			100,217
	Furniture, fixtures and other			3,604			2,558
	Construction in progress			110,677			112,819
				1,106,275			961,676
	Accumulated depletion and depreciation			(265,001	)		(212,838	)
	Property, plant and equipment, net		$	841,274		$	748,838

Accrued_Expenses

Accrued Expenses	12 Months Ended
	Dec. 31, 2014
Payables and Accruals [Abstract]
Accrued Expenses	6	Accrued Expenses
	At December 31, 2014 and 2013, accrued expenses consisted of the following:
			2014		2013
	Accrued payroll and fringe benefits		$	21,845	$	12,386
	Contingent consideration			—		9,833
	Accrued income taxes			627		—
	Other accrued expenses			13,553		6,487
	Accrued expenses		$	36,025	$	28,706
	Contingent consideration relates to the Great Plains Sands, LLC acquisition in June 2013 was paid in July 2014.

Other_LongTerm_Liabilities

Other Long-Term Liabilities	12 Months Ended
	Dec. 31, 2014
Other Liabilities Disclosure [Abstract]
Other Long-Term Liabilities	7	Other Long-Term Liabilities
	At December 31, 2014 and 2013, other long-term liabilities consisted of the following:
			2014		2013
	Interest rate swaps		$	11,696	$	5,637
	Accrued asset retirement obligations			3,122		2,680
	Accrued compensation and benefits			7,081		8,057
	Other			7,086		4,714
	Other long term liabilities		$	28,985	$	21,088

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Acquisitions	8	Acquisitions
	The Company made three acquisitions in 2013. On April 30, 2013, the Company acquired 100% of Self-Suspending Proppant LLC (“SSP”) for total consideration of $56,320 plus contingent consideration. The Company accounted for this transaction as an acquisition of a group of assets. SSP owned the exclusive rights to certain intellectual property related to providing proppant with enhanced performance attributes through proprietary coating technology. The contingent consideration is a fixed percentage of the cumulative product margin, less certain adjustments, generated by our Propel SSP sales and any other product incorporating SSP technology for the five years commencing on October 1, 2015. Because the earnout is dependent on future sales and the related cost of sales, the amounts of which are highly uncertain, it is not possible to estimate the amount that will be paid. The contingent consideration will be capitalized, and the associated amortization expense will be recognized, at the time a payment is probable and reasonably estimable.
	On June 12, 2013, the Company purchased Great Plains Sands, LLC (“Great Plains”), located in Minnesota, for total purchase consideration of $73,579. The Company accounted for this acquisition under ASC 805 as a business combination. Included in the purchase amount is contingent consideration of $9,600 for additional payments due to the seller based on the acquired plant meeting certain operating targets. The Company believes it is highly likely these targets will be met and therefore has discounted the payments only to reflect the time value of money until the expected payment date, which is within one year. The goodwill of $3,887 is primarily attributable to the synergies expected to arise after the acquisition. The Company expects that all of the goodwill generated in this acquisition will be deductible for tax purposes. The production facilities were not complete at the time of the acquisition, and accordingly there were no preacquisition revenues or cost of sales. As a result, pro forma results would not be meaningful in evaluating the financial effect of this acquisition. It is not practicable to determine revenue and net income included in the Company’s operating results relating to Great Plains since the date of acquisition because Great Plains has been fully integrated into the Company’s operations, and the operating results of Great Plains can therefore not be separately identified.
	On September 6, 2013, the Company purchased certain assets and assumed certain liabilities from FTS International Services, LLC (“FTSI”) and affiliates. The Company acquired sand reserves, frac sand production capacity, resin coating capacity and logistics assets consisting of terminals and railcars. The assets are located in various states, including Texas, Wisconsin, Missouri, Alabama, and Illinois. In connection withthis acquisition, the Company also entered into a ten year supply agreement with FTSI. In April 2014, the agreed upon quantities of certain raw sand required under the supply agreement were lowered to 80% of the original quantity. The total consideration was $347,704. The Company accounted for this acquisition under ASC 805 as a business combination. The goodwill of $49,456 is primarily attributable to the synergies expected to arise after the acquisition. The Company expects that all of the goodwill generated in this acquisition will be deductible for tax purposes. The historical financial information for the assets acquired was impracticable to obtain, and inclusion of pro forma information would require the Company to make estimates and assumptions regarding these assets’ historical financial results that may not be reasonable or accurate. As a result, pro forma results are not presented. It is not practicable to determine revenue and net income included in the Company’s operating results relating to FTSI since the date of acquisition because FTSI has been fully integrated into the Company’s operations, and the operating results of FTSI can therefore not be separately identified.
	The purchase price for each of these acquisitions was assigned to the fair value of the assets acquired. Such determination of fair value is based on valuation models that incorporate the present value of expected future cash flows and profitability projections. There are many assumptions and estimates underlying the determination of the fair value. Although the Company believes its assumptions and estimates are reasonable, deviations from the assumptions and estimates could produce a materially different result.
	The purchase price for the three transactions in 2013 has been allocated to the fair value of the assets acquired and liabilities assumed as follows:
			SSP		Great Plains			FTSI
					Sands
	Land and buildings		$	—	$	7,623		$	2,428
	Inventory			—		1,085			25,990
	Machinery and equipment			—		13,200			125,239
	Mineral reserves			—		48,100			95,500
	Other assets			—		1,568			—
	Acquired technology			56,320		—			—
	Supply agreement			—		—			50,700
	Other intangibles			—		—			687
	Goodwill			—		3,887			49,456
	Liabilities assumed			—		(1,884	)		(2,296	)
	Net assets acquired		$	56,320	$	73,579		$	347,704
	Cash consideration		$	56,320	$	63,979		$	347,704
	Contingent consideration			—		9,600			—
	Total purchase consideration		$	56,320	$	73,579		$	347,704
	The company capitalized $1,320 of transaction related expenses in connection with the SSP transaction. The Company recognized $7,113 of transaction related expenses in connection with the Great Plains and FTSI acquisitions, which is included in selling, general and administrative expenses.

Goodwill_and_Other_Intangible_

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	9	Goodwill and Other Intangible Assets
	The following table summarizes the activity in goodwill for the years ended December 31, 2014 and 2013.
			Balance at		Current Year			Current Year			Currency			Balance at
			Beginning of Year		Acquisitions			Dispositions			Translation/Other			End of Year
	Year Ended December 31, 2014:
	Proppant Solutions		$	70,991	$	—		$	—		$	(2,775	)	$	68,216
	Industrial & Recreational Products			16,461		—			—			—			16,461
	Total		$	87,452	$	—		$	—		$	(2,775	)	$	84,677
	Year Ended December 31, 2013:
	Proppant Solutions		$	18,676	$	53,343		$	(1,050	)	$	22		$	70,991
	Industrial & Recreational Products			16,461		—			—			—			16,461
	Total		$	35,137	$	53,343		$	(1,050	)	$	22		$	87,452
	Currency translation and other relates to the impact of the change in foreign currency exchange rates from our international entities on goodwill, an adjustment to the initial FTSI purchase price allocation from exercising an option to acquire an additional mining facility, and an adjustment recorded to goodwill related to the post-acquisition settlement of escrow proceeds.
	Information regarding our acquired intangible assets as of December 31, 2014 and 2013 is as follows:
			December 31, 2014
			Gross Carrying		Accumulated			Intangible
			Amount		Amortization			Assets, net
	Acquired technology and patents		$	56,928	$	(608	)	$	56,320
	Supply agreement			50,700		(6,760	)		43,940
	Other intangible assets			687		(178	)		509
	Intangible assets		$	108,315	$	(7,546	)	$	100,769
			31-Dec-13
			Gross Carrying		Accumulated			Intangible
			Amount		Amortization			Assets, net
	Acquired technology and patents		$	57,128	$	(553	)	$	56,575
	Supply agreement			50,700		(1,690	)		49,010
	Other intangible assets			687		(36	)		651
	Intangible assets		$	108,515	$	(2,279	)	$	106,236
	The acquired technology from the SSP acquisition will be amortized ratably over its estimated useful life once product using the technology is first commercialized. The supply agreement is being amortized ratably over the life of the agreement, which is 10 years.
	Estimated future amortization expense related to intangible assets at December 31, 2014 is as follows:
			Amortization
	2015		$	5,213
	2016			5,210
	2017			5,192
	2018			5,147
	2019			5,096
	Thereafter			18,591
	Total		$	44,449

LongTerm_Debt

Long-Term Debt	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Long-Term Debt	10	Long-Term Debt
			Total
			2014			2013
	Term Loans—Term B-1			319,917			322,714
	Term Loans—Term B-2			910,900			878,605
	Industrial Revenue bond			10,000			10,000
	Revolving credit facility and other			1,098			42,775
	Capital leases, net			10,724			8,052
			$	1,252,639		$	1,262,146
	Less: current portion			(17,274	)		(15,687	)
	Long-term debt including leases		$	1,235,365		$	1,246,459
	On September 5, 2013, the Company entered into an amendment (“2013 Amended Credit Agreement”) to the Amended Credit Agreement. The 2013 Amended Credit Agreement caused the issuance of two new term loans, Senior Secured Term B-1 (“B-1 Term Loan”) of $325,000 and Senior Secured Term B-2 (“B-2 Term Loan”) of $885,000, and a new Revolving Credit Agreement (“New Revolver”) with a commitment amount of $75,000. The proceeds of the borrowings under the 2013 Amended Credit Agreement were used to repay amounts outstanding under the previous credit facility and to fund the acquisition of the proppant assets of FTSI (see note 8). The Revolving Credit Facility and the Term B-1 and B-2 Loans are secured by a first priority lien on substantially all of the Company’s domestic assets.
	The B-1 Term Loan matures on March 15, 2017 and requires quarterly principal repayments of $800 (1% annually) with the balance due at maturity. The B-1 Term Loan initially bore interest at the Eurodollar rate plus 4.00% or the Base Rate plus 3.00%. The B-2 Term Loan matures on September 5, 2019 and requires quarterly principal repayments of $2,200 (1% annually) with the balance due at maturity. The B-2 Term Loan initially bore interest at the same rate as the B-1 Term Loan except that the Eurodollar rate has a floor of 1.00% and the Base Rate has a floor of 2.00%. The New Revolver expires on September 5, 2018 and bears interest at the same rate as the B-1 Term Loan. The applicable margin on the loans is reduced by 0.25% if the Company’s leverage ratio falls below 2.75.
	Subsequently in March 2014, the Company amended the existing credit agreement whereby the applicable margin for B-1 and B-2 Base Rate loans was reduced to 2.5% and B-1 and B-2 Eurodollar Rate loans wasreduced to 3.5%. As of December 31, 2014, the borrowings for the B-1 Term Loan and the New Revolver bore interest at 3.8% and the B-2 Term Loan at 4.5%. Additionally, the Company pays a commitment fee of 0.5% per annum, based on the daily average of the unused commitment under the New Revolver.
	The terms of the 2013 Amended Credit Agreement provide for customary representations and warranties and affirmative covenants. The credit facility also contains customary negative covenants setting forth limitations on further indebtedness, liens, investments, disposition of assets, acquisitions, junior payments and restrictions on subsidiary distributions. The Company must maintain a leverage ratio as of the end of each quarter of no more than 4.75 if the aggregate revolver borrowing is equal to or greater than 25% of the total revolver commitment.
	In February 2014 the Company executed a joinder agreement to borrow $41,000 as an additional B-2 Term Loan. The proceeds of this borrowing were used to repay then outstanding amounts under the New Revolver. The additional borrowings mature on the same date as the then existing B-2 Term Loan (September 5, 2019) and the required quarterly principal repayments for the B-2 Term Loan were increased by one-quarter of 1% of the amount borrowed with the balance due at maturity. There were no other changes in the terms, interest rates or covenants of the 2013 Amended Credit Agreement.
	In August and September 2014, the Company executed additional joinder agreements for incremental revolving commitments to the Revolving Credit Facility for $46,629 and $3,371 respectively, which brings the Company’s total Revolving Credit Facility commitment to $125,000. As of December 31, 2014, there was $113,467 available borrowing remaining on this facility due to $11,533 of outstanding letters of credit that reduce the amount available to borrow. There were no other changes in the terms, interest rates or covenants of the Revolving Credit Facility.
	The Company has a $10,000 Industrial Revenue Bond outstanding related to the construction of manufacturing facility in Wisconsin. The bond bears interest, which is payable monthly, at a variable rate. The rate was 0.05% at December 31, 2014. The bond matures on September 1, 2027 and is collateralized by a letter of credit of $10,000.
	Maturities of long-term debt are as follows:
			Capital Lease Obligations								Other		Total
											Long-term		Principal
			Lease			Less			Present		Debt		Payments
			Payment			Interest			Value
	Year Ended
	2015		$	5,209		$	285		$	4,924	$	13,508	$	18,432
	2016			3,640			128			3,512		12,525		16,037
	2017			1,918			38			1,880		322,693		324,573
	2018			239			11			228		9,277		9,505
	2019			183			3			180		873,874		874,054
	Thereafter			—			—			—		10,038		10,038
			$	11,189		$	465		$	10,724	$	1,241,915	$	1,252,639
	Information pertaining to assets and related accumulated depreciation in the balance sheet for capital lease items is as follows:
			2014			2013
	Cost		$	18,131		$	11,648
	Accumulated depreciation			(5,111	)		(2,011	)
	Net book value		$	13,020		$	9,637

Earnings_per_Share

Earnings per Share	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Earnings per Share	11	Earnings per Share
	The table below shows the computation of basic and diluted earnings per share of common stock for the years ended December 31, 2014, 2013, and 2012.
			2014		2013		2012
	Numerator:
	Net income attributable to FMSA Holdings Inc.		$	170,450	$	103,961	$	148,886
	Denominator:
	Basic weighted average shares outstanding			157,949,664		156,008,218		155,826,794
	Dilutive effect of employee stock options			8,327,460		8,629,336		8,501,530
	Diluted weighted average shares outstanding			166,277,124		164,637,554		164,328,324
	Earnings per common share—basic		$	1.08	$	0.67	$	0.96
	Earnings per common share—diluted		$	1.03	$	0.63	$	0.91
	The calculation of diluted weighted average shares outstanding for 2014, 2013, and 2012 excludes 715,068, 1,112,038, and 1,442,620 potential common shares because the effect of including those potential common shares would be antidilutive.

Derivative_Instruments

Derivative Instruments	12 Months Ended
	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	12	Derivative Instruments
	The Company enters into interest rate swap agreements as a means to hedge its variable interest rate risk on debt instruments. The notional value of these swap agreements is $542,300 at December 31, 2014 and effectively fixes the variable rate in a range of 0.830% to 3.115%. The notional amount of these instruments is scheduled to increase over time to provide a hedge against variable interest rate debt. The interest rate swap agreements mature at various dates between March 31, 2015 and September 5, 2019.
	Certain of the interest rate swaps qualify for cash flow hedge accounting treatment. The following table summarizes the fair values and the respective classification in the Consolidated Balance Sheets as of December 31, 2014 and 2013:
				Assets (Liabilities)
	Interest Rate Swap Agreements		Balance Sheet Classification	2014			2013
	Designated as hedges		Other long-term liabilities	$	(10,253	)	$	(2,297	)
	Not designated as hedges		Other long-term liabilities		(1,443	)		(3,340	)
	Designated as hedges		Other assets		333			2,706
				$	(11,363	)	$	(2,931	)
	In the years ended December 31, 2014 and 2012, we recognized $21 and $0, respectively, in interest expense, representing the ineffective portion of our interest rate swap agreements designated as hedges. In the year ended December 31, 2013, we recognized $15 in interest income, representing the ineffective portion of our interest rate swap agreements designed as hedges. We expect $3,382 to be reclassified from accumulated other comprehensive income into interest expense in the year ending December 31, 2015.

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Measurements	13	Fair Value Measurements
	Financial instruments held by the Company include cash equivalents, accounts receivable, accounts payable, long-term debt 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, accounts payable, and revolving credit facilities are considered to be representative of their fair values because of their short maturities. The carrying value of the Company’s long-term debt is recognized at amortized cost. The value of the Company’s Term B-1 and 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 active market prices and therefore is considered Level 1. The fair value of the Company’s Term B-1 loan was $295,750 and $329,469 and Term B-2 loan was $796,500 and $898,496 at December 31, 2014 and 2013, respectively.
	The following table presents the amounts carried at fair value as of December 31, 2014 and 2013 for the Company’s other financial instruments.
			Quoted Prices in		Other			Unobservable			Total
			Active Markets		Observable			Inputs
			(Level 1)		Inputs			(Level 3)
					(Level 2)
	December 31, 2014
	Interest rate swap agreements		$	—	$	(11,363	)	$	—		$	(11,363	)
			$	—	$	(11,363	)	$	—		$	(11,363	)
	December 31, 2013
	Contingent consideration liability		$	—	$	—		$	(9,833	)	$	(9,833	)
	Interest rate swap agreements			—		(2,931	)		—			(2,931	)
			$	—	$	(2,931	)	$	(9,833	)	$	(12,764	)

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	14	Income Taxes
	Income before provision for income taxes includes the following components:
			2014			2013			2012
	United States		$	238,332		$	137,456		$	205,493
	Foreign			9,704			12,420			14,349
			$	248,036		$	149,876		$	219,842
	The components of the provision for income taxes are as follows:
			2014			2013			2012
	Federal		$	30,656		$	34,578		$	51,537
	State and local			3,754			3,329			2,429
	Foreign			5,193			6,486			6,318
	Sub-total			39,603			44,393			60,284
	Change in deferred			37,810			826			10,085
	Total		$	77,413		$	45,219		$	70,369
	The difference between the statutory federal and state income tax rates and the Company’s effective tax rate is due principally to tax depletion and nondeductible expenses. A reconciliation of the statutory federal income tax rate to the Company’s effective tax rate is as follows:
			2014			2013			2012
	U.S. Statutory rate			35	%		35	%		35	%
	Increase (decrease) resulting from:
	State income taxes, net			1.2			2.2			1.1
	Foreign tax rate differential and adjustment			0.6			1.4			0.6
	U.S. statutory depletion			(5.8	)		(6.9	)		(3.2	)
	Manufacturers deduction			(0.9	)		(2.1	)		(2.4	)
	Other items, net			1.1			0.6			0.9
	Effective rate			31.2	%		30.2	%		32	%
	Significant components of deferred tax assets and liabilities as of December 31, 2014 and 2013 are as follows:
			2014			2013
	Current:
	Accrued liabilities		$	1,924		$	2,976
	Inventory			3,435			8,346
	Foreign tax credit carryforwards			—			426
	Valuation allowance			(201	)		—
				5,158			11,748
	Long-term:
	Property, plant and equipment			(99,352	)		(65,028	)
	Stock compensation			19,702			15,921
	Deferred compensation			1,274			1,372
	Interest rate derivatives			4,221			1,026
	Additional pension liability			1,590			978
	Intangibles			(3,370	)		(542	)
	Other assets			1,383			(578	)
	Foreign tax credit carryforwards			1,309			—
	Valuation allowance			(1,108	)		—
				(74,351	)		(46,851	)
	Net deferred tax (liabilities) assets		$	(69,193	)	$	(35,103	)
	As of December 31, 2014 and 2013, the Company had deferred tax assets relating to foreign tax credit carryforwards of $1,309 and $426, respectively, which are available to be utilized through 2024. The Company has provided a valuation allowance to reduce the carrying value of these deferred tax assets in 2014, as management has concluded that, based on available evidence, it is more likely than not that the deferred tax assets will not be realized.
	At December 31, 2014 and 2013, and 2012, cumulative undistributed earnings of foreign subsidiaries included in consolidated retained earnings amounted to $14,003, $12,368, and $16,411, respectively. These earnings are indefinitely reinvested in international operations. Accordingly, no provision has been made for U.S. deferred taxes related to future repatriation of these earnings, nor is it practical to estimate the amount of income taxes that would have to be provided if the Company was to conclude that such earnings will be remitted in the foreseeable future.
	The Company or its subsidiaries file income tax returns in the United States, Canada, China, Mexico, and Denmark. The Company is subject to income tax examinations for its U.S. Federal income taxes for the preceding three fiscal years and, in general, is subject to state and local income tax examinations for the same periods. The Company has tax years that remain open and subject to examination by tax authorities in the following major taxing jurisdictions: Canada for years after 2009, Mexico for years after 2008, and China and Denmark for years after 2010.
	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:
			2014			2013			2012
	Uncertain tax benefits balance as of January 1		$	3,038		$	3,366		$	2,249
	Increases (decreases) for tax positions in prior years			2,201			—			99
	Increases (decreases) for tax positions in current year			88			143			1,018
	Lapses in statutes of limitations			—			(471	)		—
			$	5,327		$	3,038		$	3,366
	Interest and penalty amounts previously included in the reconciliation have been removed.
	At December 31, 2014 and 2013, the Company had $5,327 and $3,038, respectively, of unrecognized tax benefits. If the $5,327 were recognized, the full amount would affect the effective tax rate. We do not expect that the amount of unrecognized tax benefits will change significantly within the next twelve months. Interest and penalties are recorded in provision for income taxes. At December 31, 2014 and 2013, the Company had $1,365 and $1,506, respectively, of accrued interest and penalties related to unrecognized tax benefits recorded.

Common_Stock_and_Stock_Based_C

Common Stock and Stock Based Compensation	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Common Stock and Stock Based Compensation	15	Common Stock and Stock Based Compensation
	The Company has a single class of par value $0.01 per share common stock. Each share of common stock has identical rights and privileges and is entitled to one vote per share. The company has authorized, but not issued, a single class of par value $0.01 per share preferred stock.
	The Company has several stock plans that allow for granting of options to acquire common shares to employees and key non-employees. As of December 31, 2013, the plans consisted of the FML Holdings, Inc. Non-Qualified Stock Option Plan (the “1997 Plan”), the Long Term Incentive Compensation Plan (the “2006 Plan”), and the FML Holdings, Inc. Stock Option Plan (the “2010 Plan”). At December 31, 2014, the 1997 Plan, the 2006 Plan, and the 2010 Plan were still in existence, and a new plan, the FMSA Holdings Inc. 2014 Long Term Incentive Plan (the “LTIP”) was added as of September 11, 2014. The LTIP authorized and issued both non-qualified stock options as well as restricted stock units (“RSU’s”).
	For all stock plans, the options are exercisable for a ten year period. Options are exercisable at times determined by the compensation committee of the Company and, as set forth in each individual option agreement. The options may become exercisable over a period of years or become exercisable only if performance or other goals set by the Board are attained, or may be a combination of both. Options may be exercised, in whole or in part, at any time after becoming exercisable, but not later than the date the option expires, which is typically 10 years from the grant date. Options granted after 2009 contain a 7 year vesting period that may be shortened to five years upon attainment of certain Company performance, except for stock issued under the LTIP Plan, which has a 5 year vesting period that may be shortened to 3 years upon attainment of certain Company performance goals as determined by the compensation committee. The stock plans also contain a change in control provision that provides for immediate vesting upon certain changes of ownership of the company. All options granted prior to 2010 are fully vested. RSU’s granted under the LTIP vest after a 6 year period and vesting can be accelerated to 4 years upon attainment of certain Company performance goals as determined by the compensation committee.
	The weighted-average fair value of RSU’s granted during the year ended December 31, 2014 was $12.96, based on the closing price of the underlying share as of the grant date. The weighted-average fair value of options granted during the years ended December 31, 2014, 2013 and 2012 was $8.49, $5.35 and $5.45, respectively, based on the Black-Scholes-Merton options-pricing model, with the following assumptions:
			2014			2013			2012
	Dividend yield			0	%		0	%		0	%
	Expected volatility			48.72	%		46.38	%		49.66	%
	Risk free interest rate			1.94 - 2.03	%		1.12 - 2.00	%		0.97 - 1.26	%
	Expected option life			6.5 years			6.5 years			6.5 years
	The Company has no current plans to declare a dividend that would require a dividend yield assumption other than zero. Expected volatility is based on the volatilities of various comparable companies’ common stock. Although the Company has been publicly traded since October 3, 2014, the Company does not believe the expected volatility of options can yet be computed based solely on the price of the Company’s common stock. The comparable companies were selected by analyzing public companies in the industry based on various factors including, but not limited to, company size, financial data availability, active trading volume, and capital structure. The risk free interest rate is an interpolated rate from the U.S. constant maturity treasury rate for a term corresponding to the expected option life. Because the Company does not have sufficient historical data to provide a reasonable basis to estimate the expected life of the options, the Company uses the simplified method, which assumes the expected life is the mid-point between the vesting date and the end of the contractual term.
	In determining the underlying value of the Company’s stock prior to the commencement of public trading on October 3, 2014, the company used a combination of the guideline company approach and a discounted cash flow analysis. The key assumptions in this estimate include management’s projections of future cash flows, the Company-specific cost of capital used as a discount rate, lack of marketability discount, and qualitative factors to compare the Company to comparable guideline companies. Following the Company’s IPO on October 3, 2014, the shares were valued at the closing price as of the date of issuance.
	The Company recorded $16,571, $10,133 and $11,434 of stock compensation expense related to these options and RSU’s, which is included in additional paid-in capital, for the years ended December 31, 2014, 2013 and 2012, respectively. Option activity during 2014 is as follows:
			Restricted			Options			Weighted
			Stock						Average
			Units						Exercise
									Price, Options
	Outstanding at December 31, 2013			—			18,980,942		$	3.98
	Granted			258,536			2,243,864			15.86
	Exercised			—			(4,677,788	)		1.4
	Forfeited			—			—			—
	Expired			—			(440,300	)		6.3
	Outstanding at December 31, 2014			258,536			16,106,718		$	6.19
	Exercisable at December 31, 2014			—			11,493,056		$	4.46
	Options outstanding as of December 31, 2014 have an aggregate intrinsic value of $44,094 and a weighted average remaining contractual life of 6.6 years. Options that are exercisable as of December 31, 2014 have an aggregate intrinsic value of $39,653 and a weighted average remaining contractual life of 5.9 years. The aggregate intrinsic value represents the difference between the fair value of the Company’s shares of $6.92 per share at December 31, 2014 and the exercise price of the dilutive options, multiplied by the number of dilutive options outstanding at that date.
	The aggregate intrinsic value of stock options exercised during the years ended December 31, 2014, 2013 and 2012 was $51,410, $6,564 and $2,574, respectively.
	Net cash proceeds from the exercise of stock options were $6,540, $1,277 and $716 in the years ended December 31, 2014, 2013 and 2012, respectively.
	There was $16,143, $2,461, and $965 of income tax benefits realized from stock option exercises in the years ended December 31, 2014, 2013 and 2012, respectively.
	At December 31, 2014, options to purchase 16,106,728 common shares were outstanding at a range of exercise prices of $1.43 to $20.52 per share. At December 31, 2013, options to purchase 18,980,942 common shares were outstanding. As of December 31, 2014, $19,874 of unrecognized compensation cost related to non-vested stock options and RSU’s is expected to be recognized over a weighted-average period of approximately 4.0 remaining years.

Defined_Benefit_Plans

Defined Benefit Plans	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Defined Benefit Plans	16	Defined Benefit Plans
	The Company maintains two defined benefit pension plans covering all union employees at certain facilities that provide benefits based upon years of service or a combination of employee earnings and length of service. The plans are underfunded by $2,249 and $926 as of December 31, 2014 and 2013, respectively. The Company is expected to fund the minimum annual contributions as determined by applicable regulations, which will be $65 for 2015; the Company reserves the right to make contributions in excess of this amount.
	The following assumptions were used to determine the Company’s obligations under the plans:
			Wedron Pension						Troy Grove Pension
			2014			2013			2014			2013
	Discount rate			3.75	%		4.5	%		4	%		5	%
	Long-term rate of return on plan assets			9	%		9	%		9	%		9	%
	The difference in the discount rates used for the Wedron Pension and the Troy Grove Pension is due to the differing characteristics of the two plans, including employee characteristics and plan size. The Company uses a cash flow matching approach to determine its discount rate using each plan’s projected cash flows and the Citigroup Discount Curve.
	The long term rate of return on assets is based on management’s estimate of future long term rates of return on similar assets and is consistent with historical returns on such assets.
	The written investment policy for the pension plans includes a target allocation of about 70% in equities and 30% in fixed income investments. Only high-quality diversified securities similar to stocks and bonds are used. Higher-risk securities or strategies (such as derivatives) are not currently used but could be used incidentally by mutual funds held by the plan. The pension plans’ obligations are long-term in nature and the investment policy is therefore focused on the long-term. Goals include achieving gross returns at least equal to relevant indices. Management and the plans’ investment advisor regularly review and discuss investment performance, adherence to the written investment policy, and the investment policy itself.
	Benefits under the Wedron plan were frozen effective December 31, 2012.The following relates to the defined benefit plans as of December 31, 2014 and 2013:
			2014			2013
	Change in benefit obligation
	Benefit obligation at beginning of year		$	7,418		$	8,105
	Service cost			74			86
	Interest cost			332			300
	Actuarial (gain) loss			1,568			(805	)
	Benefit payments			(246	)		(268	)
	Benefit obligation at end of year		$	9,146		$	7,418
	Change in plan assets
	Fair value of plan assets at beginning of year		$	6,492		$	5,552
	Actual return on plan assets			454			887
	Employer contributions			197			321
	Benefit payments			(246	)		(268	)
	Fair value of plan assets at end of year		$	6,897		$	6,492
	Accrued benefit cost		$	(2,249	)	$	(926	)
	The accrued benefit cost is included in the Consolidated Balance Sheets in other long-term liabilities.
	The following relates to the defined benefit plans as of December 31, 2014, 2013, and 2012:
			2014			2013			2012
	Components of net periodic benefit cost
	Service cost		$	74		$	86		$	211
	Interest cost			332			300			306
	Expected return on plan assets			(585	)		(503	)		(433	)
	Amortization of prior service cost			19			19			19
	Amortization of net actuarial loss			159			253			265
	Net periodic benefit cost		$	(1	)	$	155		$	368
	Changes in other comprehensive income (loss)
	Net actuarial gain (loss)		$	(1,699	)	$	1,189		$	(25	)
	Amortization of prior service costs			16			19			19
	Amortization of net actuarial loss			164			253			265
	Deferred tax asset			569			(565	)		(93	)
	Other comprehensive loss		$	(950	)	$	896		$	166
	The net actuarial loss and prior service cost that the Company expects will be amortized from accumulated other comprehensive loss into periodic benefit cost in the year ending December 31, 2015, are $265 and $19, respectively.
	Benefits expected to be paid out over the next ten years:
	Year Ending		Benefit
			Payment
	2015		$	321
	2016			350
	2017			382
	2018			414
	2019			439
	2020-2024			2,540
	Fair value measurements for assets held in the benefit plans as of December 31, 2014 are as follows:
			Quoted Prices			Other			Unobservable			Balance at
			in Active			Observable			Inputs			December 31,
			Markets			Inputs			(Level 3)			2014
			(Level 1)			(Level 2)
	Cash		$	443		$	—		$	—		$	443
	Fixed income			2,212			—			—			2,212
	Mutual funds			4,242			—			—			4,242
			$	6,897		$	—		$	—		$	6,897

Other_Benefit_Plans

Other Benefit Plans	12 Months Ended
	Dec. 31, 2014
Postemployment Benefits [Abstract]
Other Benefit Plans	17	Other Benefit Plans
	Certain union employees participate in a multiemployer defined benefit pension plan under which monthly contributions are made by the Company based upon payroll costs as governed by the collective bargaining agreement. The risks of participating in a multiemployer plan are different from a single-employer plan in the following aspects (a) assets contributed to the multiemployer plan by one employer may be used to provide benefits to employees of other participating employers; (b) if a participating employer stops contributing to the plan, the unfunded obligations of the plan may be borne by the remaining participating employers; and (c) if the Company chooses to stop participating in the multiemployer plan, the Company may be required to pay the multiemployer plan an amount based on the underfunded status of the multiemployer plan, referred to as a withdrawal liability. The Company has no plans or intentions to stop participating in the plan as of December 31, 2014. Pension expense for such plans totaled $(1), $155, and $368 for the years ended December 31, 2014, 2013, and 2012, respectively.
	The Company has a defined contribution plan (401(k) Plan) covering substantially all employees. Under the provisions of the 401(k) Plan, the Company matches 50% of each employee’s contribution up to 5% of an employee’s annual salary. Company contributions were $1,179, $965, and $739 for the years ended December 31, 2014, 2013, and 2012, respectively. Included in these contributions are Company contributions to the 401(k) Plan for Wedron Silica union members, which were $315, $266, and $0 for the years ended December 31, 2014, 2013, and 2012 respectively.
	The Company previously maintained an Employee Stock Bonus Plan (ESBP). This plan covered substantially all non-union employees. Discretionary contributions accrued at December 31, 2014 and 2013 were $4,295 and $2,103, respectively. Participant accounts in the Employee Stock Bonus Plan held 6,903,326 and 8,115,086 of common stock shares of the Company as of December 31, 2014 and 2013.
	The Company, as plan sponsor, merged the ESBP with the 401(K) Plan as of January 1, 2015. All of the assets of the ESBP were rolled over and credited to plan accounts in the 401(k) Plan.
	Effective January 1, 1999, the Company adopted a Supplemental Executive Retirement Plan (SERP) for certain employees who participate in the Company’s 401(k) plan and/or the Employee Stock Bonus Plan (ESBP). The purpose of the SERP is to provide an opportunity for the participants of the SERP to defer compensation and to receive their pro rata share of former ESBP contributions. Due to income restrictions imposed by the IRS code, such contributions were formerly made to the ESBP but, in some instances, were forfeited by these employees to the remaining ESBP participant accounts. Accrued Company contributions to the SERP were $151 and $15 for the years ended December 31, 2014 and 2013, respectively.
	The Company has deferred compensation agreements with various management employees that provide for supplemental payments upon retirement. These amounts are being accrued for over the estimated employment periods of these individuals.

SelfInsured_Plans

Self-Insured Plans	12 Months Ended
	Dec. 31, 2014
Insurance [Abstract]
Self-Insured Plans	18	Self-Insured Plans
	Certain subsidiaries, located in Illinois and Michigan, are self-insured for workers’ compensation up to $1,000 per occurrence and $3,000 in the aggregate. The Company has an accrued liability of $388 and $748 as of December 31, 2014 and 2013, respectively, for anticipated future payments on claims incurred to date. Management believes these amounts are adequate to cover all required payments.
	The Company is also self-insured for medical benefits. The Company has an accrued liability of $3,506 and $2,017 as of December 31, 2014 and 2013, respectively, for anticipated future payments on claims incurred to date. Management believes this amount is adequate to cover all required payments.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	19	Commitments and Contingencies
	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.
	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. Total royalty expense was $3,786, $1,818 and $1,503 for the years ended December 31, 2014, 2013 and 2012, respectively. The Company leases certain machinery, equipment (including railcars), buildings and office space under operating lease arrangements. Total rent expense associated with these leases was $56,247, $34,195, and $25,375 for the years ended December 31, 2014, 2013, and 2012, respectively.
	Minimum lease payments, primarily for railcars, equipment and office leases, due under the long-term operating lease obligations are shown below. The table below now properly includes railcar leases, which comprise substantially all of the Company’s equipment lease obligations.
			Equipment		Real Estate		Total
	2015		$	53,838	$	2,699	$	56,537
	2016			46,503		2,378		48,881
	2017			36,078		1,669		37,747
	2018			28,171		1,472		29,643
	2019			14,676		1,335		16,011
	Thereafter			3,993		2,491		6,484
	Total		$	183,259	$	12,044	$	195,303

Transactions_With_Related_Part

Transactions With Related Parties	12 Months Ended
	Dec. 31, 2014
Related Party Transactions [Abstract]
Transactions With Related Parties	20	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 $2,902, $1,382, and $3,463 in the years ended December 31, 2014, 2013, and 2012, respectively.
	The Company had purchases from an affiliated entity for material purchases related to its operations in China of $44, $32, and $334 in the years ended December 31, 2014, 2013, and 2012, respectively.
	The Company paid a management fee of $825, $2,821, and $1,000 in the years ended December 31, 2014, 2013, and 2012, respectively. Concurrent with the Company’s initial public offering on October 3, 2014, the Company no longer pays a management fee to American Securities LLC.

Segment_Reporting

Segment Reporting	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Segment Reporting	21	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. The other accounting policies of the segments are the same as those in the summary of significant accounting policies included in Note 2.
			Year Ended December 31,
			2014		2013		2012
	Revenue
	Proppant Solutions		$	1,232,232	$	856,212	$	757,851
	Industrial & Recreational Products			124,226		132,174		127,339
	Total revenue			1,356,458		988,386		885,190
	Segment contribution margin
	Proppant Solutions			430,779		296,320		316,251
	Industrial & Recreational Products			34,473		34,765		37,837
	Total segment contribution margin			465,252		331,085		354,088
	Operating expenses excluded from segment contribution margin
	Cost of sales			—		4,959		—
	Selling, general, and administrative			74,475		47,440		36,745
	Depreciation, depletion, and amortization			59,379		37,771		27,690
	Stock compensation expense			16,571		10,133		11,434
	Other operating expense (income)			3,163		2,826		(207	)
	Interest expense, net			60,842		61,926		56,714
	Loss on extinguishment of debt			—		11,760		—
	Other non-operating expense			2,786		4,394		1,870
	Income before provision for income taxes		$	248,036	$	149,876	$	219,842
	Total assets reported in the Proppant Solutions segment were $1,271,700 and total assets reported in the I&R segment were $63,270 as of December 31, 2014.
	The Company’s two largest customers, Haliburton and FTSI, accounted for 19% and 16% of consolidated net sales in the year ended December 31, 2014 and 19% and 11% of consolidated net sales in the year ended December 31, 2013, respectively. In the year ended December 31, 2012, the Company’s two largest customers, Haliburton and Baker Hughes, accounted for 25% and 11% of consolidated net sales. All three are customers of our Proppant Solutions segment.

Geographic_Information

Geographic Information	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Geographic Information	22	Geographic Information
	The following tables show total Company revenues and long-lived assets. Revenues are attributed to geographic regions based on the selling location. Long-lived assets are located in the respective geographic regions.
			Year Ended December 31,
			2014		2013		2012
	Revenue
	Domestic		$	1,254,071	$	920,636	$	795,372
	International			102,387		67,750		89,818
	Revenue		$	1,356,458	$	988,386	$	885,190
			As of December 31,
			2014		2013
	Long-lived assets
	Domestic		$	832,280	$	737,652
	International			8,994		11,186
	Long-lived assets		$	841,274	$	748,838

Quarterly_Financial_Data_unaud

Quarterly Financial Data (unaudited)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data (unaudited)	23	Quarterly Financial Data (unaudited)
	The following table sets forth our unaudited quarterly consolidated statements of operations for each of the last four quarters for the periods ended December 31, 2014 and 2013. This unaudited quarterly information has been prepared on the same basis as our annual audited financial statements and includes all adjustments, consisting only of normal recurring adjustments that are necessary to present fairly the financial information for the fiscal quarters presented.
			First Quarter		Second Quarter		Third Quarter		Fourth Quarter
	2014:00:00
	Revenue		$	294,932	$	334,291	$	373,479	$	353,756
	Cost of sales			191,112		211,190		228,583		220,569
	Operating expenses			36,745		43,930		50,525		62,140
	Interest expense, net			17,906		16,572		16,567		9,797
	Other non-operating expense			291		250		2,206		39
	Provision for income taxes			14,266		18,146		21,436		23,565
	Net income			34,612		44,203		54,162		37,646
	Less: Net income attributable to the non-controlling interest			73		282		85		(267	)
	Net income attributable to FMSA Holdings Inc.			34,539		43,921		54,077		37,913
	Earnings per share, basic		$	0.22	$	0.28	$	0.34	$	0.24
	Earnings per share, diluted		$	0.21	$	0.27	$	0.32	$	0.23
	Weighted average common shares outstanding, basic			156,462,356		156,684,036		158,049,782		160,542,636
	Weighted average common shares outstanding, diluted			165,082,614		165,642,288		166,911,474		167,025,422
			First Quarter		Second Quarter		Third Quarter		Fourth Quarter
	2013:00:00
	Revenue		$	220,047	$	228,194	$	265,667	$	274,478
	Cost of sales			132,133		134,273		165,666		195,770
	Operating expenses			26,504		29,710		33,932		42,442
	Interest expense, net			12,993		13,548		16,224		19,161
	Loss on extinguishment of debt			—		—		11,760		—
	Other non-operating expense			320		250		2,037		1,787
	Provision for income taxes			14,504		15,190		11,032		4,493
	Net income			33,593		35,223		25,016		10,825
	Less: Net income attributable to the non-controlling interest			36		216		269		175
	Net income attributable to FMSA Holdings Inc.			33,557		35,007		24,747		10,650
	Earnings per share, basic		$	0.22	$	0.22	$	0.16	$	0.07
	Earnings per share, diluted		$	0.2	$	0.21	$	0.15	$	0.06
	Weighted average common shares outstanding, basic			155,877,318		155,958,000		155,992,136		156,185,596
	Weighted average common shares outstanding, diluted			164,601,208		164,508,830		164,600,392		164,826,390

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation
	The consolidated financial statements include the accounts of FMSA Holdings Inc. and its wholly-owned and majority-owned subsidiaries (collectively, the “Company”). All significant intercompany balances and transactions have been eliminated in consolidation.
Use of Estimates	Use of Estimates
	The preparation of financial statements in conformity with generally accepted accounting principles 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.
Revenue Recognition	Revenue Recognition
	Revenue is recognized when delivery of products has occurred, the selling price is fixed or determinable, collectability is reasonably assured and title and risk of loss have transferred to the customer. This generally occurs when products leave a storage terminal or, in the case of direct shipments, when products leave a production facility. In a majority of cases, transportation costs to move product from a production facility to a storage terminal are borne by the Company and capitalized into the cost of inventory. These costs are included in the cost of sales as the product is sold.
	The Company derives its revenue by mining and processing minerals that its customers purchase for various uses. Its net sales are primarily a function of the price per ton realized and the volumes sold. In a small number of instances, its net sales also include a charge for transportation services it provides to its customers.
	In the Proppant Solutions segment, the Company primarily sells its products under market rate contracts with terms typically ranging from two to ten years. The Company invoices the majority of its customers on a per shipment basis when the customer takes possession of the product.
Cash and Cash Equivalents	Cash and Cash Equivalents
	The Company considers all highly liquid debt instruments purchased with a maturity of three months or less to be cash equivalents. At various times, the Company maintains funds on deposit at its banks in excess of FDIC insurance limits.
Accounts Receivable	Accounts Receivable
	Trade accounts receivable are stated at the amount management expects to collect, and do not bear interest. Management provides for uncollectible amounts based on its assessment of the current status of individual accounts. Accounts receivable are net of allowance for doubtful accounts of $4,255 and $796 as of December 31, 2014 and 2013, respectively.
Inventories	Inventories
	Inventories are stated at the lower of cost or market. Certain subsidiaries determine cost using the last-in, first-out (LIFO) method. If the first-in, first-out (FIFO) method of inventory accounting had been used, inventories would have been higher by $2,960 and $176 at December 31, 2014 and 2013, respectively.
	LIFO inventories comprise 16% and 24% of inventories reflected in the accompanying Consolidated Balance Sheets as of December 31, 2014 and 2013, respectively. The cost of inventories of all other subsidiaries is determined using the FIFO method. In 2013, the Company recognized $4,958 permanent write-down in the value of finished goods inventory, net of expected recoveries from suppliers. The inventory write-down is included in cost of sales. In the year ended December 31, 2014, the Company recorded a write-down of $908 of certain field trial inventory, which is included in other operating expense.
Property, Plant and Equipment	Property, Plant and Equipment
	Property, plant and equipment are stated at cost. Expenditures, including interest, for property, plant and equipment and items that substantially increase the useful lives of existing assets are capitalized, while expenditures for repairs and maintenance are expensed as incurred.
	Depreciation on property, plant and equipment is computed on a straight-line basis over the estimated useful lives of the related assets. Amortization of leasehold improvements is computed using the straight-line method over the shorter of the remaining lease term or the estimated useful lives of the improvements.
	Depletion expense calculated for depletable land and mineral rights is based on cost multiplied by a depletion factor. The depletion factor varies based on production and other factors, but is generally equal to annual tons mined divided by total estimated remaining reserves for the mine.
	The estimated service lives of property and equipment are principally as follows:
	Land improvements		10-40 years
	Machinery and equipment		3-20 years
	Buildings and improvements		10-40 years
	Furniture, fixtures, and other		3-10 years
	Construction in progress is stated at cost, which includes the cost of construction and other direct costs attributable to the construction. No provision for depreciation is made on construction in progress until such time as the relevant assets are completed and put into use. Construction in progress at December 31, 2014, represents machinery and facilities under installation.
	The Company capitalizes interest cost incurred on funds used to construct property, plant, and equipment. The capitalized interest is recorded as part of the asset to which it relates and is amortized over the asset’s estimated useful life. Interest cost capitalized was $6,765 and $2,540 in 2014 and 2013, respectively.
	Depreciation and depletion expense was $54,111, $35,917, and $27,562 in years ended December 31, 2014, 2013, and 2012, respectively.
	Included in land and improvements are occupancy rights in China of $354 that are held for a term of 50 years until December 2057.
	The Company reviews property, plant and equipment for impairment whenever events or changes in circumstances indicate that the carrying amount of property, plant and equipment may not be recoverable from the estimated future cash flows expected to result from its use and eventual disposition. In cases where undiscounted expected future cash flows are less than the carrying value, an impairment loss is recognized equal to an amount by which the carrying value exceeds the fair value of assets or asset groups. The factors considered by management in performing this assessment include current operating results, trends, and prospects, as well as the effects of obsolescence, demand, competition, and other economic factors. As a result of these tests, the Company did not record a write down in the carrying value of certain minerals rights in the years ended December 31, 2014 and 2013, but the Company did record a write-down of $273 in the year ended December 31, 2012.
Deferred Financing Costs	Deferred Financing Costs
	Deferred financing costs are amortized over the terms of the related debt obligations and are included in other assets. In connection with the refinancing of the Company’s debt in September 2013 (see note 10), the Company incurred financing costs of $15,132 of which $14,171 were capitalized. In connection with the refinancing, the Company wrote off $11,358 of costs that were previously capitalized. In 2014, the Company incurred additional deferred financing charges in connection with the amendment of the existing credit agreement whereby the applicable margin for B-1 and B-2 base rate and Eurodollar loans was reduced (refer to note 10).
	The following table presents deferred financing costs as of December 31, 2014 and 2013:
		2014			2013
	Deferred financing costs	$	37,936		$	36,705
	Accumulated amortization		(17,510	)		(12,475	)
	Deferred financing costs, net	$	20,426		$	24,230
Goodwill and Intangible Assets	Goodwill and Intangible Assets
	Goodwill and indefinite-lived intangible assets are reviewed for impairment by applying a fair-value based test on an annual basis or more frequently if circumstances indicate that impairment may have occurred. The Company evaluates qualitative factors such as economic performance, industry conditions, and other factors to determine if it is more-likely-than-not that the fair value of the reporting unit is less than its carrying amount. As a result of this evaluation at December 31, 2014, the Company performed a quantitative two-step impairment test. The first step of the goodwill impairment test, used to identify potential impairment, compares the fair value of a reporting unit with its carrying amount, including goodwill. If the carrying amount of a reporting unit exceeds its fair value, an indication of goodwill impairment exists. The second step of the goodwill impairment test is performed to measure the amount of the impairment loss, if any. If the carrying amount of goodwill exceeds its implied fair value, an impairment loss is recognized equal to the excess. The implied fair value of goodwill is determined by allocating the fair value of the reporting unit in a manner similar to a purchase price allocation, and the residual fair value after this allocation is the implied fair value of the reporting unit goodwill.
	The Company reviews definite-lived intangible assets for impairment whenever events or changes in circumstances indicate that the carrying amount of a definite-lived intangible asset may not be recoverable from the estimated future cash flows expected to result from its use and eventual disposition. In cases where undiscounted expected future cash flows are less than the carrying value, an impairment loss is recognized equal to an amount by which the carrying value exceeds the fair value of the assets or asset groups.
	The evaluation of goodwill or other intangible assets for possible impairment includes estimating fair value using one or a combination of valuation techniques, such as discounted cash flows or based on comparable companies or transactions. These valuations require the Company to make estimates and assumptions regarding future operating results, cash flows, changes in working capital and capital expenditures, selling prices, profitability, and the cost of capital. Although the Company believes its assumptions and estimates are reasonable, deviations from the assumptions and estimates could produce a materially different result.
	The Company did not recognize any impairment losses for goodwill or other intangible assets in the years ended December 31, 2014, 2013, and 2012.
Earnings per Share	Earnings per Share
	Basic and diluted earnings per share is presented for net income attributable to FMSA Holdings Inc. Basic earnings per share is computed by dividing income available to FMSA Holdings Inc. common stockholders by the weighted-average number of outstanding common shares for the period. Diluted earnings per share iscomputed by increasing the weighted-average number of outstanding common shares to include the additional common shares that would be outstanding after exercise of outstanding stock options and restricted stock units. Potential common shares in the diluted earnings per share calculation are excluded to the extent that they would be anti-dilutive.
Derivatives and Hedging Activities	Derivatives and Hedging Activities
	Due to its variable-rate indebtedness, the Company is exposed to fluctuations in interest rates. The Company uses interest rate swaps to manage this exposure. These 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 during 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.
Foreign Currency Translation	Foreign Currency Translation
	Assets and liabilities of all foreign operations are translated at the rate of exchange in effect on the balance sheet date; income and expenses are translated at the average rates of exchange prevailing during the year. The related translation adjustments are reflected as accumulated other comprehensive income (loss) in equity.
Concentration of Labor	Concentration of Labor
	Approximately 12% of the Company’s domestic labor force is covered under six union agreements that expire at various times through November 2016. None of the contracts expire before March 2015.
Concentration of Credit Risk	Concentration of Credit Risk
	At December 31, 2014, we had two customers whose receivable balances exceeded 10% of our total receivables. Approximately, 21% and 18% of the accounts receivable balance are from these two customers, respectively. At December 31, 2013, we had three customers whose receivable balances exceeded 10% of our total receivables. Approximately 20%, 13%, and 11% of the accounts receivable balance are from these three customers, respectively.
Income Taxes	Income Taxes
	The Company uses the asset and liability method to account for deferred income taxes. Deferred tax assets and liabilities are recognized for the anticipated future tax consequences attributable to differences between financial statement amounts and their respective tax bases. Management reviews the Company’s deferred tax assets to determine whether their value can be realized based upon available evidence. A valuation allowance is established if management believes it is more likely than not that some portion of the deferred tax assets will not be realized.
	Changes in valuation allowances from period to period are included in the Company’s tax provision in the period of change.
	The Company recognizes a tax benefit associated with an uncertain tax position when the tax position is more-likely-than-not to be sustained upon examination by taxing authorities. The amount recognized is measured as the amount of benefit that is greater than 50% likely of being realized upon ultimate settlement. The Company recognizes interest and penalties accrued related to unrecognized tax uncertainties in income tax expense.
Asset Retirement Obligations	Asset Retirement Obligations
	We estimate the future cost of dismantling, restoring and reclaiming operating excavation sites and related facilities in accordance with federal, state and local regulatory requirements. We record the initial estimated present value of reclamation costs as an asset retirement obligation and increase the carrying amount of the related asset by a corresponding amount. We allocate reclamation costs to expense over the life of the related assets and adjust the related liability for changes resulting from the passage of time and revisions to either the timing or amount of the original present value estimate. If the asset retirement obligation is settled for more or less than the carrying amount of the liability, a loss or gain will be recognized, respectively.
Research and Development (R&D)	Research and Development (R&D)
	The Company’s research and development expenses consist of personnel and other direct and indirect costs for internally funded project development. Total expenses for R&D for the years ended December 31, 2014, 2013, and 2012 were $6,286, $5,364, and $1,815, respectively. Total research and development expenditures represented 0.46%, 0.54%, and 0.21% of revenues in 2014, 2013, and 2012, respectively.
Change in Classification	Change in Classification
	During the current year the Company modified the presentation of certain recoverable value-added taxes and other taxes remitted in Mexico to more appropriately reflect the nature of the underlying tax-related receivables. Comparative amounts in the consolidated balance sheets were reclassified for consistency, which resulted in $7,163 being reclassified from accounts receivable, net to prepaid expenses and other assets as of December 31, 2013. Since the reclassification is entirely within current assets, there is no net effect on current and long-term assets.
	The consolidated statements of cash flows were also modified to reflect the reclassification and resulted in $1,366 and $1,332 being reclassified from the change in accounts receivable to the change in prepaids and other assets for the years ended December 31, 2013 and 2012, respectively. There was no net effect to cash flows provided by operating activities for either period.
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss)
	Accumulated other comprehensive income (loss) is a separate line within equity that reports the Company’s cumulative income that has not been reported as part of net income. Items that are included in this line are the income or loss from foreign currency translation, actuarial gains and losses and prior service cost related to pension liabilities, and the unrealized gains and losses on certain investments or hedges, net of taxes. The components of accumulated other comprehensive income (loss) attributable to FMSA Holdings Inc. at December 31, 2014 and 2013 were as follows:
		December 31, 2014
		Gross			Tax Effect			Net Amount
	Foreign currency translation	$	(4,979	)	$	—		$	(4,979	)
	Additional pension liability		(4,236	)		1,588			(2,648	)
	Unrealized loss on interest rate hedges		(8,292	)		3,110			(5,182	)
		$	(17,507	)	$	4,698		$	(12,809	)
		31-Dec-13
		Gross			Tax Effect			Net Amount
	Foreign currency translation	$	(2,626	)	$	—		$	(2,626	)
	Additional pension liability		(2,717	)		1,019			(1,698	)
	Unrealized gain on interest rate hedges		1,260			(472	)		788
		$	(4,083	)	$	547		$	(3,536	)
	The following table presents the changes in accumulated other comprehensive income by component for the year ended December 31, 2014:
		Year Ended December 31, 2014
		Unrealized			Additional			Foreign			Total
		gain (loss) on			pension			currency
		interest rate			liability			translation
		hedges
	Beginning balance	$	788		$	(1,698	)	$	(2,626	)	$	(3,536	)
	Other comprehensive income (loss) before reclassifications		(7,609	)		(1,062	)		(2,353	)		(11,024	)
	Amounts reclassified from accumulated other comprehensive income		1,639			112			—			1,751
	Ending balance	$	(5,182	)	$	(2,648	)	$	(4,979	)	$	(12,809	)
	The following table presents the reclassifications out of accumulated comprehensive income during the year ended December 31, 2014:
	Details about accumulated other comprehensive income	Amount reclassified			Affected line item on the
		from accumulated
		other comprehensive			statement of income
		income
	Change in fair value of derivative swap agreements
	Interest rate hedging contracts	$	2,623		Interest expense
	Tax effect		(984	)	Tax expense (benefit)
		$	1,639		Net of tax
	Amortization of pension obligations
	Prior service cost	$	16		Cost of sales
	Actuarial losses		164		Cost of sales
			180		Total before tax
	Tax effect		(68	)	Tax expense
		$	112		Net of tax
	Total reclassifications for the period	$	1,751		Net of tax
Recent Accounting Pronouncements	In May 2014, the FASB issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (ASU 2014-09). Under ASU 2014-09, companies recognize revenue in a manner that depicts the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled, in exchange for those goods or services. Additionally, the guidance requires improved disclosures to help users of financial statements better understand the nature, amount, timing, and uncertainty of revenue that is recognized. The guidance is effective for reporting periods beginning after December 15, 2016. The Company is in the process of evaluating the effect of the new guidance on its financial statements and disclosures.
	On February 18, 2015, the FASB issued Accounting Standards Update No. 2015-02 – Consolidation (Topic 810). The amendments in this Update affect reporting entities that are required to evaluate whether they should consolidate certain legal entities. The amendments modify the evaluation of whether certain limited partnerships and similar entities are variable interest entities (VIEs) or voting interest entities, impact the consolidation analysis of VIEs, and provide an exception for certain registered money market funds. The Company does not have any unconsolidated or consolidated legal entities impacted by this amendment.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Summary of Estimated Service Lives of Property and Equipment	The estimated service lives of property and equipment are principally as follows:
	Land improvements		10-40 years
	Machinery and equipment		3-20 years
	Buildings and improvements		10-40 years
	Furniture, fixtures, and other		3-10 years
Summary of Deferred Financing Costs	The following table presents deferred financing costs as of December 31, 2014 and 2013:
		2014			2013
	Deferred financing costs	$	37,936		$	36,705
	Accumulated amortization		(17,510	)		(12,475	)
	Deferred financing costs, net	$	20,426		$	24,230
Components of Accumulated Other Comprehensive Income (Loss)	The components of accumulated other comprehensive income (loss) attributable to FMSA Holdings Inc. at December 31, 2014 and 2013 were as follows:
		December 31, 2014
		Gross			Tax Effect			Net Amount
	Foreign currency translation	$	(4,979	)	$	—		$	(4,979	)
	Additional pension liability		(4,236	)		1,588			(2,648	)
	Unrealized loss on interest rate hedges		(8,292	)		3,110			(5,182	)
		$	(17,507	)	$	4,698		$	(12,809	)
		31-Dec-13
		Gross			Tax Effect			Net Amount
	Foreign currency translation	$	(2,626	)	$	—		$	(2,626	)
	Additional pension liability		(2,717	)		1,019			(1,698	)
	Unrealized gain on interest rate hedges		1,260			(472	)		788
		$	(4,083	)	$	547		$	(3,536	)
Changes in Accumulated Other Comprehensive Income by Component	The following table presents the changes in accumulated other comprehensive income by component for the year ended December 31, 2014:
		Year Ended December 31, 2014
		Unrealized			Additional			Foreign			Total
		gain (loss) on			pension			currency
		interest rate			liability			translation
		hedges
	Beginning balance	$	788		$	(1,698	)	$	(2,626	)	$	(3,536	)
	Other comprehensive income (loss) before reclassifications		(7,609	)		(1,062	)		(2,353	)		(11,024	)
	Amounts reclassified from accumulated other comprehensive income		1,639			112			—			1,751
	Ending balance	$	(5,182	)	$	(2,648	)	$	(4,979	)	$	(12,809	)
Reclassifications out of Accumulated Comprehensive Income	The following table presents the reclassifications out of accumulated comprehensive income during the year ended December 31, 2014:
	Details about accumulated other comprehensive income	Amount reclassified			Affected line item on the
		from accumulated
		other comprehensive			statement of income
		income
	Change in fair value of derivative swap agreements
	Interest rate hedging contracts	$	2,623		Interest expense
	Tax effect		(984	)	Tax expense (benefit)
		$	1,639		Net of tax
	Amortization of pension obligations
	Prior service cost	$	16		Cost of sales
	Actuarial losses		164		Cost of sales
			180		Total before tax
	Tax effect		(68	)	Tax expense
		$	112		Net of tax
	Total reclassifications for the period	$	1,751		Net of tax

Inventories_Tables

Inventories (Tables)	12 Months Ended
	Dec. 31, 2014
Inventory Disclosure [Abstract]
Schedule of Inventories	At December 31, 2014 and 2013, inventories consisted of the following:
		2014			2013
	Raw materials	$	19,803		$	16,766
	Work-in-process		23,568			24,576
	Finished goods		91,202			77,183
			134,573			118,525
	Less: LIFO reserve		(2,960	)		(176	)
	Inventories	$	131,613		$	118,349

Property_Plant_and_Equipment_T

Property, Plant, and Equipment (Tables)	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant and Equipment	At December 31, 2014 and 2013, property, plant and equipment consisted of the following:
		2014			2013
	Land and improvements	$	63,800		$	38,557
	Mineral reserves and mine development		303,804			280,727
	Machinery and equipment		478,225			426,798
	Buildings and improvements		146,165			100,217
	Furniture, fixtures and other		3,604			2,558
	Construction in progress		110,677			112,819
			1,106,275			961,676
	Accumulated depletion and depreciation		(265,001	)		(212,838	)
	Property, plant and equipment, net	$	841,274		$	748,838

Accrued_Expenses_Tables

Accrued Expenses (Tables)	12 Months Ended
	Dec. 31, 2014
Payables and Accruals [Abstract]
Summery of Accrued Expenses	At December 31, 2014 and 2013, accrued expenses consisted of the following:
		2014		2013
	Accrued payroll and fringe benefits	$	21,845	$	12,386
	Contingent consideration		—		9,833
	Accrued income taxes		627		—
	Other accrued expenses		13,553		6,487
	Accrued expenses	$	36,025	$	28,706

Other_LongTerm_Liabilities_Tab

Other Long-Term Liabilities (Tables)	12 Months Ended
	Dec. 31, 2014
Other Liabilities Disclosure [Abstract]
Summary of Other Long-Term Liabilities	At December 31, 2014 and 2013, other long-term liabilities consisted of the following:
		2014		2013
	Interest rate swaps	$	11,696	$	5,637
	Accrued asset retirement obligations		3,122		2,680
	Accrued compensation and benefits		7,081		8,057
	Other		7,086		4,714
	Other long term liabilities	$	28,985	$	21,088

Acquisitions_Tables

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Summary of Fair Value of the Assets Acquired and Liabilities Assumed	The purchase price for the three transactions in 2013 has been allocated to the fair value of the assets acquired and liabilities assumed as follows:
		SSP		Great Plains			FTSI
				Sands
	Land and buildings	$	—	$	7,623		$	2,428
	Inventory		—		1,085			25,990
	Machinery and equipment		—		13,200			125,239
	Mineral reserves		—		48,100			95,500
	Other assets		—		1,568			—
	Acquired technology		56,320		—			—
	Supply agreement		—		—			50,700
	Other intangibles		—		—			687
	Goodwill		—		3,887			49,456
	Liabilities assumed		—		(1,884	)		(2,296	)
	Net assets acquired	$	56,320	$	73,579		$	347,704
	Cash consideration	$	56,320	$	63,979		$	347,704
	Contingent consideration		—		9,600			—
	Total purchase consideration	$	56,320	$	73,579		$	347,704

Goodwill_and_Other_Intangible_1

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Activity in Goodwill	The following table summarizes the activity in goodwill for the years ended December 31, 2014 and 2013.
		Balance at		Current Year			Current Year			Currency			Balance at
		Beginning of Year		Acquisitions			Dispositions			Translation/Other			End of Year
	Year Ended December 31, 2014:
	Proppant Solutions	$	70,991	$	—		$	—		$	(2,775	)	$	68,216
	Industrial & Recreational Products		16,461		—			—			—			16,461
	Total	$	87,452	$	—		$	—		$	(2,775	)	$	84,677
	Year Ended December 31, 2013:
	Proppant Solutions	$	18,676	$	53,343		$	(1,050	)	$	22		$	70,991
	Industrial & Recreational Products		16,461		—			—			—			16,461
	Total	$	35,137	$	53,343		$	(1,050	)	$	22		$	87,452
Summary of Acquired Intangible Assets	Information regarding our acquired intangible assets as of December 31, 2014 and 2013 is as follows:
		December 31, 2014
		Gross Carrying		Accumulated			Intangible
		Amount		Amortization			Assets, net
	Acquired technology and patents	$	56,928	$	(608	)	$	56,320
	Supply agreement		50,700		(6,760	)		43,940
	Other intangible assets		687		(178	)		509
	Intangible assets	$	108,315	$	(7,546	)	$	100,769
		31-Dec-13
		Gross Carrying		Accumulated			Intangible
		Amount		Amortization			Assets, net
	Acquired technology and patents	$	57,128	$	(553	)	$	56,575
	Supply agreement		50,700		(1,690	)		49,010
	Other intangible assets		687		(36	)		651
	Intangible assets	$	108,515	$	(2,279	)	$	106,236
Summary of Estimated Future Amortization Expense Related to Intangible Assets	Estimated future amortization expense related to intangible assets at December 31, 2014 is as follows:
		Amortization
	2015	$	5,213
	2016		5,210
	2017		5,192
	2018		5,147
	2019		5,096
	Thereafter		18,591
	Total	$	44,449

LongTerm_Debt_Tables

Long-Term Debt (Tables)	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Schedule of Long-Term Debt	Total
		2014			2013
	Term Loans—Term B-1		319,917			322,714
	Term Loans—Term B-2		910,900			878,605
	Industrial Revenue bond		10,000			10,000
	Revolving credit facility and other		1,098			42,775
	Capital leases, net		10,724			8,052
		$	1,252,639		$	1,262,146
	Less: current portion		(17,274	)		(15,687	)
	Long-term debt including leases	$	1,235,365		$	1,246,459
Maturities of Long-Term Debt	Maturities of long-term debt are as follows:
		Capital Lease Obligations								Other		Total
										Long-term		Principal
		Lease			Less			Present		Debt		Payments
		Payment			Interest			Value
	Year Ended
	2015	$	5,209		$	285		$	4,924	$	13,508	$	18,432
	2016		3,640			128			3,512		12,525		16,037
	2017		1,918			38			1,880		322,693		324,573
	2018		239			11			228		9,277		9,505
	2019		183			3			180		873,874		874,054
	Thereafter		—			—			—		10,038		10,038
		$	11,189		$	465		$	10,724	$	1,241,915	$	1,252,639
Summary of Asset and Related Accumulated Depreciation in Balance Sheet for Capital Lease Items	Information pertaining to assets and related accumulated depreciation in the balance sheet for capital lease items is as follows:
		2014			2013
	Cost	$	18,131		$	11,648
	Accumulated depreciation		(5,111	)		(2,011	)
	Net book value	$	13,020		$	9,637

Earnings_per_Share_Tables

Earnings per Share (Tables)	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings per Share	The table below shows the computation of basic and diluted earnings per share of common stock for the years ended December 31, 2014, 2013, and 2012.
		2014		2013		2012
	Numerator:
	Net income attributable to FMSA Holdings Inc.	$	170,450	$	103,961	$	148,886
	Denominator:
	Basic weighted average shares outstanding		157,949,664		156,008,218		155,826,794
	Dilutive effect of employee stock options		8,327,460		8,629,336		8,501,530
	Diluted weighted average shares outstanding		166,277,124		164,637,554		164,328,324
	Earnings per common share—basic	$	1.08	$	0.67	$	0.96
	Earnings per common share—diluted	$	1.03	$	0.63	$	0.91

Derivative_Instruments_Tables

Derivative Instruments (Tables)	12 Months Ended
	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Values of Derivative Instrument and Respective Classification in Consolidated Balance Sheets	The following table summarizes the fair values and the respective classification in the Consolidated Balance Sheets as of December 31, 2014 and 2013:
			Assets (Liabilities)
	Interest Rate Swap Agreements	Balance Sheet Classification	2014			2013
	Designated as hedges	Other long-term liabilities	$	(10,253	)	$	(2,297	)
	Not designated as hedges	Other long-term liabilities		(1,443	)		(3,340	)
	Designated as hedges	Other assets		333			2,706
			$	(11,363	)	$	(2,931	)

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Financial Instruments Carried at Fair Value	The following table presents the amounts carried at fair value as of December 31, 2014 and 2013 for the Company’s other financial instruments.
		Quoted Prices		Other			Unobservable			Total
		in Active		Observable			Inputs
		Markets		Inputs			(Level 3)
		(Level 1)		(Level 2)
	December 31, 2014
	Interest rate swap agreements	$	—	$	(11,363	)	$	—		$	(11,363	)
		$	—	$	(11,363	)	$	—		$	(11,363	)
	December 31, 2013
	Contingent consideration liability	$	—	$	—		$	(9,833	)	$	(9,833	)
	Interest rate swap agreements		—		(2,931	)		—			(2,931	)
		$	—	$	(2,931	)	$	(9,833	)	$	(12,764	)

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Schedule of Components of Income Before Income Taxes	Income before provision for income taxes includes the following components:
		2014			2013			2012
	United States	$	238,332		$	137,456		$	205,493
	Foreign		9,704			12,420			14,349
		$	248,036		$	149,876		$	219,842
Schedule of Components of Provision for Income Taxes	The components of the provision for income taxes are as follows:
		2014			2013			2012
	Federal	$	30,656		$	34,578		$	51,537
	State and local		3,754			3,329			2,429
	Foreign		5,193			6,486			6,318
	Sub-total		39,603			44,393			60,284
	Change in deferred		37,810			826			10,085
	Total	$	77,413		$	45,219		$	70,369
Reconciliation of Statutory Federal Income Tax Rate to Company's Effective Tax Rate	The difference between the statutory federal and state income tax rates and the Company’s effective tax rate is due principally to tax depletion and nondeductible expenses. A reconciliation of the statutory federal income tax rate to the Company’s effective tax rate is as follows:
		2014			2013			2012
	U.S. Statutory rate		35	%		35	%		35	%
	Increase (decrease) resulting from:
	State income taxes, net		1.2			2.2			1.1
	Foreign tax rate differential and adjustment		0.6			1.4			0.6
	U.S. statutory depletion		(5.8	)		(6.9	)		(3.2	)
	Manufacturers deduction		(0.9	)		(2.1	)		(2.4	)
	Other items, net		1.1			0.6			0.9
	Effective rate		31.2	%		30.2	%		32	%
Schedule of Components of Net Deferred Tax Assets and Liabilities	Significant components of deferred tax assets and liabilities as of December 31, 2014 and 2013 are as follows:
		2014			2013
	Current:
	Accrued liabilities	$	1,924		$	2,976
	Inventory		3,435			8,346
	Foreign tax credit carryforwards		—			426
	Valuation allowance		(201	)		—
			5,158			11,748
	Long-term:
	Property, plant and equipment		(99,352	)		(65,028	)
	Stock compensation		19,702			15,921
	Deferred compensation		1,274			1,372
	Interest rate derivatives		4,221			1,026
	Additional pension liability		1,590			978
	Intangibles		(3,370	)		(542	)
	Other assets		1,383			(578	)
	Foreign tax credit carryforwards		1,309			—
	Valuation allowance		(1,108	)		—
			(74,351	)		(46,851	)
	Net deferred tax (liabilities) assets	$	(69,193	)	$	(35,103	)
Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:
		2014			2013			2012
	Uncertain tax benefits balance as of January 1	$	3,038		$	3,366		$	2,249
	Increases (decreases) for tax positions in prior years		2,201			—			99
	Increases (decreases) for tax positions in current year		88			143			1,018
	Lapses in statutes of limitations		—			(471	)		—
		$	5,327		$	3,038		$	3,366

Common_Stock_and_Stock_Based_C1

Common Stock and Stock Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Fair Value Assumptions Based on Black-Scholes-Merton Options-Pricing Model	The weighted-average fair value of RSU’s granted during the year ended December 31, 2014 was $12.96, based on the closing price of the underlying share as of the grant date. The weighted-average fair value of options granted during the years ended December 31, 2014, 2013 and 2012 was $8.49, $5.35 and $5.45, respectively, based on the Black-Scholes-Merton options-pricing model, with the following assumptions:
		2014			2013			2012
	Dividend yield		0	%		0	%		0	%
	Expected volatility		48.72	%		46.38	%		49.66	%
	Risk free interest rate		1.94 - 2.03	%		1.12 - 2.00	%		0.97 - 1.26	%
	Expected option life		6.5 years			6.5 years			6.5 years
Schedule of Stock Option Activity	Option activity during 2014 is as follows:
		Restricted			Options			Weighted
		Stock						Average
		Units						Exercise
								Price, Options
	Outstanding at December 31, 2013		—			18,980,942		$	3.98
	Granted		258,536			2,243,864			15.86
	Exercised		—			(4,677,788	)		1.4
	Forfeited		—			—			—
	Expired		—			(440,300	)		6.3
	Outstanding at December 31, 2014		258,536			16,106,718		$	6.19
	Exercisable at December 31, 2014		—			11,493,056		$	4.46

Defined_Benefit_Plans_Tables

Defined Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2014
Summary of Assumptions Used to Determine the Company's Obligations	The following assumptions were used to determine the Company’s obligations under the plans:
		Wedron Pension						Troy Grove Pension
		2014			2013			2014			2013
	Discount rate		3.75	%		4.5	%		4	%		5	%
	Long-term rate of return on plan assets		9	%		9	%		9	%		9	%
Summary of Estimated Future Benefit Payment	Benefits expected to be paid out over the next ten years:
	Year Ending	Benefit
		Payment
	2015	$	321
	2016		350
	2017		382
	2018		414
	2019		439
	2020-2024		2,540
Summary of Fair Value Measurements for Assets Held in Benefit Plans	Fair value measurements for assets held in the benefit plans as of December 31, 2014 are as follows:
		Quoted Prices			Other			Unobservable			Balance at
		in Active			Observable			Inputs			December 31,
		Markets			Inputs			(Level 3)			2014
		(Level 1)			(Level 2)
	Cash	$	443		$	—		$	—		$	443
	Fixed income		2,212			—			—			2,212
	Mutual funds		4,242			—			—			4,242
		$	6,897		$	—		$	—		$	6,897
Change In Benefit Obligation [Member]
Summary of Defined Benefit Plans	The following relates to the defined benefit plans as of December 31, 2014 and 2013:
		2014			2013
	Change in benefit obligation
	Benefit obligation at beginning of year	$	7,418		$	8,105
	Service cost		74			86
	Interest cost		332			300
	Actuarial (gain) loss		1,568			(805	)
	Benefit payments		(246	)		(268	)
	Benefit obligation at end of year	$	9,146		$	7,418
	Change in plan assets
	Fair value of plan assets at beginning of year	$	6,492		$	5,552
	Actual return on plan assets		454			887
	Employer contributions		197			321
	Benefit payments		(246	)		(268	)
	Fair value of plan assets at end of year	$	6,897		$	6,492
	Accrued benefit cost	$	(2,249	)	$	(926	)
Net Periodic Benefit Cost [Member]
Summary of Defined Benefit Plans	The following relates to the defined benefit plans as of December 31, 2014, 2013, and 2012:
		2014			2013			2012
	Components of net periodic benefit cost
	Service cost	$	74		$	86		$	211
	Interest cost		332			300			306
	Expected return on plan assets		(585	)		(503	)		(433	)
	Amortization of prior service cost		19			19			19
	Amortization of net actuarial loss		159			253			265
	Net periodic benefit cost	$	(1	)	$	155		$	368
	Changes in other comprehensive income (loss)
	Net actuarial gain (loss)	$	(1,699	)	$	1,189		$	(25	)
	Amortization of prior service costs		16			19			19
	Amortization of net actuarial loss		164			253			265
	Deferred tax asset		569			(565	)		(93	)
	Other comprehensive loss	$	(950	)	$	896		$	166

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Schedule of Minimum Lease Payments Under Long-term Operating Lease Obligations	Minimum lease payments, primarily for railcars, equipment and office leases, due under the long-term operating lease obligations are shown below. The table below now properly includes railcar leases, which comprise substantially all of the Company’s equipment lease obligations.
		Equipment		Real Estate		Total
	2015	$	53,838	$	2,699	$	56,537
	2016		46,503		2,378		48,881
	2017		36,078		1,669		37,747
	2018		28,171		1,472		29,643
	2019		14,676		1,335		16,011
	Thereafter		3,993		2,491		6,484
	Total	$	183,259	$	12,044	$	195,303

Segment_Reporting_Tables

Segment Reporting (Tables)	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Summarized Financial Information for Reportable Segments
		Year Ended December 31,
		2014		2013		2012
	Revenue
	Proppant Solutions	$	1,232,232	$	856,212	$	757,851
	Industrial & Recreational Products		124,226		132,174		127,339
	Total revenue		1,356,458		988,386		885,190
	Segment contribution margin
	Proppant Solutions		430,779		296,320		316,251
	Industrial & Recreational Products		34,473		34,765		37,837
	Total segment contribution margin		465,252		331,085		354,088
	Operating expenses excluded from segment contribution margin
	Cost of sales		—		4,959		—
	Selling, general, and administrative		74,475		47,440		36,745
	Depreciation, depletion, and amortization		59,379		37,771		27,690
	Stock compensation expense		16,571		10,133		11,434
	Other operating expense (income)		3,163		2,826		(207	)
	Interest expense, net		60,842		61,926		56,714
	Loss on extinguishment of debt		—		11,760		—
	Other non-operating expense		2,786		4,394		1,870
	Income before provision for income taxes	$	248,036	$	149,876	$	219,842

Geographic_Information_Tables

Geographic Information (Tables)	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Summary of Revenue and Long-lived Assets	The following tables show total Company revenues and long-lived assets. Revenues are attributed to geographic regions based on the selling location. Long-lived assets are located in the respective geographic regions.
		Year Ended December 31,
		2014		2013		2012
	Revenue
	Domestic	$	1,254,071	$	920,636	$	795,372
	International		102,387		67,750		89,818
	Revenue	$	1,356,458	$	988,386	$	885,190
		As of December 31,
		2014		2013
	Long-lived assets
	Domestic	$	832,280	$	737,652
	International		8,994		11,186
	Long-lived assets	$	841,274	$	748,838

Quarterly_Financial_Data_unaud1

Quarterly Financial Data (unaudited) (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Data	The following table sets forth our unaudited quarterly consolidated statements of operations for each of the last four quarters for the periods ended December 31, 2014 and 2013. This unaudited quarterly information has been prepared on the same basis as our annual audited financial statements and includes all adjustments, consisting only of normal recurring adjustments that are necessary to present fairly the financial information for the fiscal quarters presented.
		First Quarter		Second Quarter		Third Quarter		Fourth Quarter
	2014:00:00
	Revenue	$	294,932	$	334,291	$	373,479	$	353,756
	Cost of sales		191,112		211,190		228,583		220,569
	Operating expenses		36,745		43,930		50,525		62,140
	Interest expense, net		17,906		16,572		16,567		9,797
	Other non-operating expense		291		250		2,206		39
	Provision for income taxes		14,266		18,146		21,436		23,565
	Net income		34,612		44,203		54,162		37,646
	Less: Net income attributable to the non-controlling interest		73		282		85		(267	)
	Net income attributable to FMSA Holdings Inc.		34,539		43,921		54,077		37,913
	Earnings per share, basic	$	0.22	$	0.28	$	0.34	$	0.24
	Earnings per share, diluted	$	0.21	$	0.27	$	0.32	$	0.23
	Weighted average common shares outstanding, basic		156,462,356		156,684,036		158,049,782		160,542,636
	Weighted average common shares outstanding, diluted		165,082,614		165,642,288		166,911,474		167,025,422
		First Quarter		Second Quarter		Third Quarter		Fourth Quarter
	2013:00:00
	Revenue	$	220,047	$	228,194	$	265,667	$	274,478
	Cost of sales		132,133		134,273		165,666		195,770
	Operating expenses		26,504		29,710		33,932		42,442
	Interest expense, net		12,993		13,548		16,224		19,161
	Loss on extinguishment of debt		—		—		11,760		—
	Other non-operating expense		320		250		2,037		1,787
	Provision for income taxes		14,504		15,190		11,032		4,493
	Net income		33,593		35,223		25,016		10,825
	Less: Net income attributable to the non-controlling interest		36		216		269		175
	Net income attributable to FMSA Holdings Inc.		33,557		35,007		24,747		10,650
	Earnings per share, basic	$	0.22	$	0.22	$	0.16	$	0.07
	Earnings per share, diluted	$	0.2	$	0.21	$	0.15	$	0.06
	Weighted average common shares outstanding, basic		155,877,318		155,958,000		155,992,136		156,185,596
	Weighted average common shares outstanding, diluted		164,601,208		164,508,830		164,600,392		164,826,390

Organization_Additional_Inform

Organization - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014
	Segments
	Country
Organization [Line Items]
Number of reportable segments	2
Number of countries in which Proppant solutions business serves	7
Santrol (Yixing) Proppant Co [Member]
Organization [Line Items]
Ownership percentage in subsidiary	70.00%
Technimat LLC [Member]
Organization [Line Items]
Ownership percentage in subsidiary company	90.00%

Summary_of_Significant_Account3

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2013
		Labor_Unions	Customer
		Customer
Significant Of Accounting Policies [Line Items]
Allowance for doubtful accounts		$4,255,000	$796,000
Higher inventories valuation using FIFO		2,960,000	176,000
Inventory percentage		16.00%	24.00%
Write down in value of inventory		908,000
Write down value of inventory included in other operating expense			4,958,000
Provision for depreciation		0
Interest cost capitalized		6,765,000	2,540,000
Depreciation and depletion expense		54,111,000	35,917,000	27,562,000
Land and land improvements		354,000
Property plant and equipment, estimated useful life		50 years
Carrying value of minerals		0	0	273,000
Financing costs	1,913,000	1,913,000	14,171,000
Capitalized costs	20,426,000	20,426,000	24,230,000		20,426,000
Financing costs write off	11,358,000		11,358,000
Goodwill and other intangible asset impairment losses		0	0	0
Number of union Agreements		6
Contract expire date		2016-11
Number of customer		2	3
Total expense for research and development		6,286,000	5,364,000	1,815,000
Minimum [Member]
Significant Of Accounting Policies [Line Items]
Debt instrument maturity period		3 months
Tax benefit recognition, threshold limit		50.00%
Current And Long Term Assets [Member]
Significant Of Accounting Policies [Line Items]
Reclassification adjustments			7,163,000
Adjustments to Operating Activities [Member]
Significant Of Accounting Policies [Line Items]
Reclassification adjustments			$1,366,000	$1,332,000
Workforce Subject to Collective Bargaining Arrangements [Member] | Unionized Employees Concentration Risk [Member]
Significant Of Accounting Policies [Line Items]
Accounts receivable, percentage		12.00%
Revenues [Member] | Research And Development Concentration Risk [Member]
Significant Of Accounting Policies [Line Items]
Accounts receivable, percentage		0.46%	0.54%	0.21%
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Significant Of Accounting Policies [Line Items]
Accounts receivable, percentage		10.00%	10.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer One [Member]
Significant Of Accounting Policies [Line Items]
Accounts receivable, percentage		21.00%	20.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer Two [Member]
Significant Of Accounting Policies [Line Items]
Accounts receivable, percentage		18.00%	13.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer Three [Member]
Significant Of Accounting Policies [Line Items]
Accounts receivable, percentage			11.00%

Summary_of_Significant_Account4

Summary of Significant Accounting Policies - Summary of Estimated Service Lives of Property and Equipment (Detail)	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property plant and equipment, estimated service lives	50 years
Minimum [Member] | Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, estimated service lives	10 years
Minimum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, estimated service lives	3 years
Minimum [Member] | Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, estimated service lives	10 years
Minimum [Member] | Furniture, Fixtures and Other [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, estimated service lives	3 years
Maximum [Member] | Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, estimated service lives	40 years
Maximum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, estimated service lives	20 years
Maximum [Member] | Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, estimated service lives	40 years
Maximum [Member] | Furniture, Fixtures and Other [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, estimated service lives	10 years

Summary_of_Significant_Account5

Summary of Significant Accounting Policies - Summary of Deferred Financing Costs (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified
Deferred Finance Costs, Net [Abstract]
Deferred financing costs	$37,936	$36,705
Accumulated amortization	-17,510	-12,475
Deferred financing costs, net	$20,426	$24,230	$20,426

Summary_of_Significant_Account6

Summary of Significant Accounting Policies - Components of Accumulated Other Comprehensive Income (loss) (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), Gross	($17,507)	($4,083)
Accumulated other comprehensive income (loss), Tax Effect	4,698	547
Accumulated other comprehensive income (loss)	-12,809	-3,536
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), Gross	-4,979	-2,626
Accumulated other comprehensive income (loss)	-4,979	-2,626
Additional Pension Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), Gross	-4,236	-2,717
Accumulated other comprehensive income (loss), Tax Effect	1,588	1,019
Accumulated other comprehensive income (loss)	-2,648	-1,698
Unrealized Gain (Loss) on Interest Rate Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), Gross	-8,292	1,260
Accumulated other comprehensive income (loss), Tax Effect	3,110	-472
Accumulated other comprehensive income (loss)	($5,182)	$788

Summary_of_Significant_Account7

Summary of Significant Accounting Policies - Changes in Accumulated Other Comprehensive Income by Component (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	($3,536)
Other comprehensive income (loss) before reclassifications	-11,024
Amounts reclassified from accumulated other comprehensive income	1,751
Ending balance	-12,809
Unrealized Gain (Loss) on Interest Rate Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	788
Other comprehensive income (loss) before reclassifications	-7,609
Amounts reclassified from accumulated other comprehensive income	1,639
Ending balance	-5,182
Additional Pension Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	-1,698
Other comprehensive income (loss) before reclassifications	-1,062
Amounts reclassified from accumulated other comprehensive income	112
Ending balance	-2,648
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	-2,626
Other comprehensive income (loss) before reclassifications	-2,353
Ending balance	($4,979)

Summary_of_Significant_Account8

Summary of Significant Accounting Policies - Reclassifications out of Accumulated Comprehensive Income (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax									$248,036	$149,876	$219,842
Provision for income taxes	-23,565	-21,436	-18,146	-14,266	-4,493	-11,032	-15,190	-14,504	-77,413	-45,219	-70,369
Net income	37,646	54,162	44,203	34,612	10,825	25,016	35,223	33,593	170,623	104,657	149,473
Cost of sales	220,569	228,583	211,190	191,112	195,770	165,666	134,273	132,133	851,454	627,842	502,417
Reclassification Out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income									1,751
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									2,623
Provision for income taxes									-984
Net income									1,639
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									16
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									164
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									180
Provision for income taxes									-68
Net income									$112

Inventories_Schedule_of_Invent

Inventories - Schedule of Inventories (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]
Raw materials	$19,803	$16,766
Work-in-process	23,568	24,576
Finished goods	91,202	77,183
Inventory gross	134,573	118,525
Less: LIFO reserve	-2,960	-176
Inventories	$131,613	$118,349

Property_Plant_and_Equipment_S

Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	$1,106,275	$961,676
Accumulated depletion and depreciation	-265,001	-212,838
Property, plant, and equipment, net	841,274	748,838
Land and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	63,800	38,557
Mineral Reserves and Mine Development [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	303,804	280,727
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	478,225	426,798
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	146,165	100,217
Furniture, Fixtures and Other [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	3,604	2,558
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	$110,677	$112,819

Accrued_Expenses_Summery_of_Ac

Accrued Expenses - Summery of Accrued Expenses (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Payables and Accruals [Abstract]
Accrued payroll and fringe benefits	$21,845	$12,386
Contingent consideration		9,833
Accrued income taxes	627
Other accrued expenses	13,553	6,487
Accrued expenses	$36,025	$28,706

Other_LongTerm_Liabilities_Sum

Other Long-Term Liabilities - Summary of Other Long-Term Liabilities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Other Liabilities Disclosure [Abstract]
Interest rate swaps	$11,696	$5,637
Accrued asset retirement obligations	3,122	2,680
Accrued compensation and benefits	7,081	8,057
Other	7,086	4,714
Other long term liabilities	$28,985	$21,088

Acquisitions_Summary_of_Fair_V

Acquisitions - Summary of Fair Value of the Assets Acquired and Liabilities Assumed (Detail) (USD $)	1 Months Ended	0 Months Ended
In Thousands, unless otherwise specified	Apr. 30, 2013	Jun. 12, 2013	Sep. 06, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Acquisition Date [Line Items]
Goodwill				$84,677	$87,452	$35,137
Self-Suspending Proppant LLC [Member]
Acquisition Date [Line Items]
Acquired technology	56,320
Net assets acquired	56,320
Cash consideration	56,320
Total purchase consideration	56,320
Great Plains Sands, LLC [Member]
Acquisition Date [Line Items]
Land and buildings		7,623
Inventory		1,085
Machinery and equipment		13,200
Mineral reserves		48,100
Other assets		1,568
Goodwill		3,887
Liabilities assumed		-1,884
Net assets acquired		73,579
Cash consideration		63,979
Contingent consideration		9,600
Total purchase consideration		73,579
FTS International Services, Inc [Member]
Acquisition Date [Line Items]
Land and buildings			2,428
Inventory			25,990
Machinery and equipment			125,239
Mineral reserves			95,500
Supply agreement			50,700
Other intangibles			687
Goodwill			49,456
Liabilities assumed			-2,296
Net assets acquired			347,704
Cash consideration			347,704
Total purchase consideration			$347,704

Acquisitions_Additional_Inform

Acquisitions - Additional Information (Detail) (USD $)	12 Months Ended	1 Months Ended	12 Months Ended	0 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Apr. 30, 2013	Dec. 31, 2014	Jun. 12, 2013	Sep. 06, 2013	Dec. 31, 2012	Apr. 30, 2014
	Acquisition
Business Acquisition [Line Items]
Number of acquisition	3
Goodwill	$87,452		84,677			$35,137
Self-Suspending Proppant LLC [Member]
Business Acquisition [Line Items]
Percentage of ownership acquired							100.00%
Business acquisition date			30-Apr-13
Total purchase consideration		56,320
Transaction related expenses		1,320
Great Plains Sands, LLC [Member]
Business Acquisition [Line Items]
Business acquisition date			12-Jun-13
Total purchase consideration				73,579
Contingent consideration				9,600
Goodwill				3,887
Transaction related expenses				7,113
FTS International Services, Inc [Member]
Business Acquisition [Line Items]
Business acquisition date			6-Sep-13
Total purchase consideration					347,704
Goodwill					$49,456
Acquisition based supply agreement term					10 years
Percentage of lowest supply of row sand under the supply agreement					80.00%

Goodwill_and_Other_Intangible_2

Goodwill and Other Intangible Assets - Summary of Activity in Goodwill (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Goodwill [Line Items]
Balance at Beginning of Year	$87,452	$35,137
Current Year Acquisitions		53,343
Current Year Dispositions		-1,050
Currency Translation/Other	-2,775	22
Balance at End of Year	84,677	87,452
Proppant Solutions [Member]
Goodwill [Line Items]
Balance at Beginning of Year	70,991	18,676
Current Year Acquisitions		53,343
Current Year Dispositions		-1,050
Currency Translation/Other	-2,775	22
Balance at End of Year	68,216	70,991
Industrial & Recreational Products [Member]
Goodwill [Line Items]
Balance at Beginning of Year	16,461	16,461
Current Year Acquisitions
Current Year Dispositions
Currency Translation/Other
Balance at End of Year	$16,461	$16,461

Goodwill_and_Other_Intangible_3

Goodwill and Other Intangible Assets - Summary of Acquired Intangible Assets (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$108,315	$108,515
Accumulated Amortization	-7,546	-2,279
Intangible Assets, net	100,769	106,236
Acquired Technology and Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	56,928	57,128
Accumulated Amortization	-608	-553
Intangible Assets, net	56,320	56,575
Supply Agreement [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	50,700	50,700
Accumulated Amortization	-6,760	-1,690
Intangible Assets, net	43,940	49,010
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	687	687
Accumulated Amortization	-178	-36
Intangible Assets, net	$509	$651

Goodwill_and_Other_Intangible_4

Goodwill and Other Intangible Assets - Additional Information (Detail) (Supply Agreement [Member])	12 Months Ended
	Dec. 31, 2014
Supply Agreement [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life of acquired intangible assets	10 years

Goodwill_and_Other_Intangible_5

Goodwill and Other Intangible Assets - Summary of Estimated Future Amortization Expense Related to Intangible Assets (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Intangible Liability Disclosure [Abstract]
2015	$5,213
2016	5,210
2017	5,192
2018	5,147
2019	5,096
Thereafter	18,591
Total	$44,449

LongTerm_Debt_Schedule_of_Long

Long-Term Debt - Schedule of Long-Term Debt (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Debt Instrument [Line Items]
Industrial Revenue bond	$10,000	$10,000
Revolving credit facility and other	1,098	42,775
Capital leases, net	10,724	8,052
Long term debt	1,252,639	1,262,146
Long term debt	1,252,639	1,262,146
Less: current portion	-17,274	-15,687
Long-term debt including leases	1,235,365	1,246,459
Term Loans - Term B-1 [Member]
Debt Instrument [Line Items]
Term Loans	319,917	322,714
Term Loans - Term B-2 [Member]
Debt Instrument [Line Items]
Term Loans	$910,900	$878,605

LongTerm_Debt_Additional_Infor

Long-Term Debt - Additional Information (Detail) (USD $)	1 Months Ended		12 Months Ended		0 Months Ended	1 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Aug. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Sep. 05, 2013	Mar. 31, 2014	Feb. 28, 2014
Debt Instrument [Line Items]
Revolving credit facility commitment			$113,467
Debt instrument borrowings, maturity date			1-Sep-27
Basis spread on variable rate, percentage			0.05%
Change in margin on the loan			0.25%
Leverage ratio			2.75
Line of credit facility, incremental revolving commitments	3,371	46,629
Borrowings on additional capacity	125,000	125,000	32,267	148,100
Outstanding Letters of credit			11,533
Industrial revenue bond outstanding			10,000
Letter of credit			10,000
Maximum [Member]
Debt Instrument [Line Items]
Leverage ratio			475.00%
Line of credit facility, commitment fee percentage			25.00%
Amended Credit Agreement [Member]
Debt Instrument [Line Items]
Commitment amount on revolving credit					75,000
Term Loan B-1 [Member]
Debt Instrument [Line Items]
Debt instrument borrowings, maturity date					15-Mar-17
Principal repayment on term loan, amount					800
Principal repayment on term loan, percentage					1.00%
Term Loan B-1 [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate, percentage					3.00%	2.50%
Term Loan B-1 [Member] | Eurodollar [Member]
Debt Instrument [Line Items]
Basis spread on variable rate, percentage					4.00%	3.50%
Term Loan B-1 [Member] | Amended Credit Agreement [Member]
Debt Instrument [Line Items]
Revolving credit facility commitment					325,000
Term Loan B-2 [Member]
Debt Instrument [Line Items]
Debt instrument borrowings, maturity date					5-Sep-19		5-Sep-19
Principal repayment on term loan, amount					2,200
Principal repayment on term loan, percentage					1.00%
Debt instrument increased borrowings							41,000
Debt instrument borrowings, interest rate term			One-quarter of 1%
Term Loan B-2 [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate, percentage						2.50%
Term Loan interest					2.00%
Term Loan B-2 [Member] | Eurodollar [Member]
Debt Instrument [Line Items]
Basis spread on variable rate, percentage						3.50%
Term Loan interest					1.00%
Term Loan B-2 [Member] | Amended Credit Agreement [Member]
Debt Instrument [Line Items]
Revolving credit facility commitment					$885,000
New Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving commitment expiry date					5-Sep-18

LongTerm_Debt_Maturities_of_Lo

Long-Term Debt - Maturities of Long-term debt (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Debt Instrument [Line Items]
Capital Lease Obligations, Lease Payment, 2015	$5,209
Capital Lease Obligations, Lease Payment, 2016	3,640
Capital Lease Obligations, Lease Payment, 2017	1,918
Capital Lease Obligations, Lease Payment, 2018	239
Capital Lease Obligations, Lease Payment, 2019	183
Capital Lease Obligations, Lease Payment, Thereafter	0
Capital Lease Obligations, Lease Payment, Total	11,189
Capital Lease Obligations, Less Interest, 2015	285
Capital Lease Obligations, Less Interest, 2016	128
Capital Lease Obligations, Less Interest, 2017	38
Capital Lease Obligations, Less Interest, 2018	11
Capital Lease Obligations, Less Interest, 2019	3
Capital Lease Obligations, Less Interest, Thereafter	0
Capital Lease Obligations, Less Interest, Total	465
Capital Lease Obligations, Present Value, 2015	4,924
Capital Lease Obligations, Present Value, 2016	3,512
Capital Lease Obligations, Present Value, 2017	1,880
Capital Lease Obligations, Present Value, 2018	228
Capital Lease Obligations, Present Value, 2019	180
Capital Lease Obligations, Present Value, Thereafter	0
Capital Lease Obligations, Present Value, Total	10,724
Other Long-term Debt, Total	1,252,639	1,262,146
Total Principal Payments, 2015	18,432
Total Principal Payments, 2016	16,037
Total Principal Payments, 2017	324,573
Total Principal Payments, 2018	9,505
Total Principal Payments, 2019	874,054
Total Principal Payments, Thereafter	10,038
Total Principal Payments, Total	1,252,639
Other Long-term Debt [Member]
Debt Instrument [Line Items]
Other Long-term Debt, 2015	13,508
Other Long-term Debt, 2016	12,525
Other Long-term Debt, 2017	322,693
Other Long-term Debt, 2018	9,277
Other Long-term Debt, 2019	873,874
Other Long-term Debt, Thereafter	10,038
Other Long-term Debt, Total	$1,241,915

Long_Term_Debt_Summary_of_Asse

Long Term Debt - Summary of Asset and Related Accumulated Depreciation in Balance Sheet for Capital Lease Items (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Capital Lease Obligations [Abstract]
Cost	$18,131	$11,648
Accumulated depreciation	-5,111	-2,011
Net book value	$13,020	$9,637

Earnings_Per_Share_Computation

Earnings Per Share - Computation of Basic and Diluted Earnings per Share (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Numerator:
Net income attributable to FMSA Holdings Inc.	$37,913	$54,077	$43,921	$34,539	$10,650	$24,747	$35,007	$33,557	$170,450	$103,961	$148,886
Denominator:
Basic weighted average shares outstanding	160,542,636	158,049,782	156,684,036	156,462,356	156,185,596	155,992,136	155,958,000	155,877,318	157,949,664	156,008,218	155,826,794
Dilutive effect of employee stock options									8,327,460	8,629,336	8,501,530
Diluted weighted average shares outstanding									166,277,124	164,637,554	164,328,324
Earnings per common share-basic	$0.24	$0.34	$0.28	$0.22	$0.07	$0.16	$0.22	$0.22	$1.08	$0.67	$0.96
Earnings per common share-diluted	$0.23	$0.32	$0.27	$0.21	$0.06	$0.15	$0.21	$0.20	$1.03	$0.63	$0.91

Earnings_per_Share_Additional_

Earnings per Share - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share [Abstract]
Securities excluded from computation of earning per share	715,068	1,112,038	1,442,620

Derivative_Instruments_Additio

Derivative Instruments - Additional Information (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivative [Line Items]
Interest expense	($9,797)	($16,567)	($16,572)	($17,906)	($19,161)	($16,224)	($13,548)	($12,993)	($60,842)	($61,926)	($56,714)
Reclassification Out of Accumulated Other Comprehensive Income [Member]
Derivative [Line Items]
Interest expense									3,382
Interest Rate Swap Agreements [Member]
Derivative [Line Items]
Notional amount of swap agreements	542,300								542,300
Interest expense									($21)	$15	$0
Interest Rate Swap Agreements [Member] | Minimum [Member]
Derivative [Line Items]
Derivative, minimum variable interest rate	0.83%								0.83%
Interest rate swap agreement, maturity date									31-Mar-15
Interest Rate Swap Agreements [Member] | Maximum [Member]
Derivative [Line Items]
Derivative, maximum variable interest rate	3.12%								3.12%
Interest rate swap agreement, maturity date									5-Sep-19

Derivative_Instruments_Fair_Va

Derivative Instruments - Fair Values of Derivative Instrument and Respective Classification in Consolidated Balance Sheets (Detail) (Interest Rate Swap Agreements [Member], USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Derivatives, Fair Value [Line Items]
Derivative, fair value	($11,363)	($2,931)
Designated as Hedges [Member] | Other Long-Term Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	-10,253	-2,297
Designated as Hedges [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	333	2,706
Not Designated as Hedges [Member] | Other Long-Term Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	($1,443)	($3,340)

Fair_Value_Measurements_Additi

Fair Value Measurements - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Term Loan B-1 [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fair value of long term debt	$295,750	$329,469
Term Loan B-2 [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fair value of long term debt	$796,500	$898,496

Fair_Value_Measurements_Financ

Fair Value Measurements - Financial Instruments Carried at Fair Value (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Net Asset (Liability)	($11,363)	($12,764)
Contingent consideration liability		-9,833
Interest Rate Swap Agreements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements	-11,363	-2,931
Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Net Asset (Liability)	-11,363	-2,931
Other Observable Inputs (Level 2) [Member] | Interest Rate Swap Agreements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements	-11,363	-2,931
Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Net Asset (Liability)		-9,833
Contingent consideration liability		($9,833)

Income_Taxes_Schedule_of_Compo

Income Taxes - Schedule of Components of Income Before Income Taxes (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
United States	$238,332	$137,456	$205,493
Foreign	9,704	12,420	14,349
Income before income taxes	$248,036	$149,876	$219,842

Income_Taxes_Schedule_of_Compo1

Income Taxes - Schedule of Components of Provision for Income Taxes (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Federal									$30,656	$34,578	$51,537
State and local									3,754	3,329	2,429
Foreign									5,193	6,486	6,318
Sub-total									39,603	44,393	60,284
Change in deferred									37,810	826	10,085
Total	$23,565	$21,436	$18,146	$14,266	$4,493	$11,032	$15,190	$14,504	$77,413	$45,219	$70,369

Income_Taxes_Reconciliation_of

Income Taxes - Reconciliation of Statutory Federal Income Tax Rate to Company's Effective Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
U.S. Statutory rate	35.00%	35.00%	35.00%
Increase (decrease) resulting from:
State income taxes, net	1.20%	2.20%	1.10%
Foreign tax rate differential and adjustment	0.60%	1.40%	0.60%
U.S. statutory depletion	-5.80%	-6.90%	-3.20%
Manufacturers deduction	-0.90%	-2.10%	-2.40%
Other items, net	1.10%	0.60%	0.90%
Effective rate	31.20%	30.20%	32.00%

Income_Taxes_Schedule_of_Compo2

Income Taxes - Schedule of Components of Net Deferred Tax Assets and Liabilities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current:
Accrued liabilities	$1,924	$2,976
Inventory	3,435	8,346
Foreign tax credit carryforwards	1,309	426
Valuation allowance	-201
Deferred tax (liabilities) assets, Current	5,158	11,748
Long-term:
Property, plant and equipment	-99,352	-65,028
Stock compensation	19,702	15,921
Deferred compensation	1,274	1,372
Interest rate derivatives	4,221	1,026
Additional pension liability	1,590	978
Intangibles	-3,370	-542
Other assets	1,383
Other assets		-578
Foreign tax credit carryforwards	1,309	426
Valuation allowance	-1,108
Deferred tax (liabilities) assets, long-term	-74,351	-46,851
Net deferred tax (liabilities) assets	($69,193)	($35,103)

IncomeTaxes_Additional_Informa

IncomeTaxes - Additional Information (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Foreign tax credit carryforwards	$1,309	$426
Foreign tax credits carryforward description	Utilized through 2024
Cumulative undistributed earnings	14,003	12,368	16,411
Unrecognized tax benefits	5,327	3,038	3,366	2,249
Amount of accrued interest and penalties related to unrecognized tax benefits	$1,365	$1,506

Income_Taxes_Reconciliation_of1

Income Taxes - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits, beginning balance	$3,038	$3,366	$2,249
Increases (decreases) for tax positions in prior years	2,201		99
Increases (decreases) for tax positions in current year	88	143	1,018
Lapses in statutes of limitations		-471
Unrecognized Tax Benefits, ending balance	$5,327	$3,038	$3,366

Common_Stock_and_Stock_Based_C2

Common Stock and Stock Based Compensation - Additional Information (Detail) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, par value	$0.01	$0.01
Preferred stock, par value	$0.01	$0.01
Option exercisable period	5 years 10 months 24 days
Option expiration period	10 years
Weighted-average fair value of options granted	$8.49	$5.35	$5.45
Stock compensation expense	$16,571	$10,133	$11,434
Aggregate intrinsic value of option outstanding	44,094
Weighted average remaining contractual life	6 years 7 months 6 days
Aggregate intrinsic value of option exercisable	39,653
Aggregate intrinsic value	$6.92
Aggregate intrinsic value of stock options exercised	51,410	6,564	2,574
Proceeds from option exercises	6,540	1,277	716
Income tax benefits realized from stock option exercises	16,143	2,461	965
Purchase shares outstanding	16,106,718	18,980,942
Unrecognized compensation cost of non-vested stock options	$19,874
Weighted-average period of unrecognized compensation of non-vested stock options	4 years
Weighted Average Exercise Price, Option, Granted	$15.86
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value	$12.96
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of option	7 years
Weighted Average Exercise Price, Option, Granted	$20.52
Maximum [Member] | LTIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of option	5 years
Maximum [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of option	6 years
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of option	5 years
Weighted Average Exercise Price, Option, Granted	$1.43
Minimum [Member] | LTIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of option	3 years
Minimum [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of option	4 years
Common Class B [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option exercisable period	10 years

Common_Stock_and_Stock_Based_C3

Common Stock and Stock Based Compensation - Schedule of Fair Value Assumptions Based on Black-Scholes-Merton Options-Pricing Model (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options Outstanding, Weighted Average Exercise Price, and Additional Disclosures [Abstract]
Dividend yield	0.00%	0.00%	0.00%
Expected volatility	48.72%	46.38%	49.66%
Risk free interest rate, minimum	1.94%	1.12%	0.97%
Risk free interest rate, maximum	2.03%	2.00%	1.26%
Expected option life	6 years 6 months	6 years 6 months	6 years 6 months

Common_Stock_and_Stock_Based_C4

Common Stock and Stock Based Compensation - Summary of Share Based Compensation Activity Of Option and Non-option Instruments (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, Outstanding Beginning Balance	18,980,942
Options, Granted	2,243,864
Options, Exercised	-4,677,788
Options, Forfeited	0
Options, Expired	-440,300
Options, Outstanding Ending Balance	16,106,718
Options, Exercisable Ending Balance	11,493,056
Weighted Average Exercise Price, Option, Outstanding Beginning Balance	$3.98
Weighted Average Exercise Price, Option, Granted	$15.86
Weighted Average Exercise Price, Option, Exercised	$1.40
Weighted Average Exercise Price, Option, Forfeited	$0
Weighted Average Exercise Price, Option, Expired	$6.30
Weighted Average Exercise Price, Option, Outstanding Ending Balance	$6.19
Weighted Average Exercise Price, Option, Exercisable Ending Balance	$4.46
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock Units, Outstanding Beginning Balance	0
Restricted Stock Units, Granted	258,536
Restricted Stock Units, Outstanding Ending Balance	258,536

Defined_Benefit_Plans_Addition

Defined Benefit Plans - Additional Information (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
	Pension_Plan
Defined Benefit Plan Disclosure [Line Items]
Number of defined benefit pension plans	2
Underfunded pension plan	$2,249	$926
Expected minimum annual contribution	321
Defined Benefit Plan, Future Amortization of Gain	265
Defined Benefit Plan, Future Amortization of Prior Service Cost	19
Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target plan asset allocations	70.00%
Fixed Income Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target plan asset allocations	30.00%
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected minimum annual contribution	$65

Defined_Benefit_Plans_Summary_

Defined Benefit Plans - Summary of Assumptions Used to Determine the Company's Obligations (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Wedron Pension [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Discount rate	3.75%	4.50%
Long-term rate of return on plan assets	9.00%	9.00%
Troy Grove Pension [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Discount rate	4.00%	5.00%
Long-term rate of return on plan assets	9.00%	9.00%

Defined_Benefit_Plans_Summary_1

Defined Benefit Plans - Summary of Defined Benefit Plans (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Compensation and Retirement Disclosure [Abstract]
Benefit obligation at beginning of year	$7,418	$8,105
Service cost	74	86	211
Interest cost	332	300	306
Actuarial (gain) loss	1,568	-805
Benefit payments	-246	-268
Benefit obligation at end of year	9,146	7,418	8,105
Fair value of plan assets at beginning of year	6,492	5,552
Actual return on plan assets	454	887
Employer contributions	197	321
Benefit payments	-246	-268
Fair value of plan assets at end of year	6,897	6,492	5,552
Accrued benefit cost	-2,249	-926
Service cost	74	86	211
Interest cost	332	300	306
Expected return on plan assets	-585	-503	-433
Amortization of prior service cost	19	19	19
Amortization of net actuarial loss	159	253	265
Net periodic benefit cost	-1	155	368
Net actuarial gain (loss)	-1,699	1,189	-25
Amortization of prior service costs	16	19	19
Amortization of net actuarial loss	164	253	265
Deferred tax asset	569	-565	-93
Other comprehensive loss	($950)	$896	$166

Defined_Benefit_Plans_Estimate

Defined Benefit Plans - Estimated Future Benefit Payment (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Compensation and Retirement Disclosure [Abstract]
2015	$321
2016	350
2017	382
2018	414
2019	439
2020-2024	$2,540

Defined_Benefit_Plans_Summary_2

Defined Benefit Plans - Summary of Fair Value Measurements for Assets Held in Benefit Plans (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Defined Benefit Plan Disclosure [Line Items]
Total	$6,897	$6,492	$5,552
Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	2,212
Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	4,242
Quoted Prices in Active Markets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	6,897
Quoted Prices in Active Markets (Level 1) [Member] | Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	2,212
Quoted Prices in Active Markets (Level 1) [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	4,242
Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	443
Cash [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	$443

Other_Benefit_Plans_Additional

Other Benefit Plans - Additional Information (Detail) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Pension expense for multiemployer defined benefit pension plan	($1)	$155	$368
Defined contribution 401(k) plan, Company's contribution matching employee's contribution Percentage	50.00%
Defined contribution 401(k) plan, Maximum Annual Contributions Per Employee Percent	5.00%
Company contributions to the Supplemental Executive Retirement Plan (SERP)	1,179	965	739
Discretionary contributions accrued on Employee Stock Bonus Plan	4,295	2,103
Shares held in participant accounts in Employee Stock Bonus Plan	6,903,326	8,115,086
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Company contributions to the Supplemental Executive Retirement Plan (SERP)	151	15
Wedron Silica Union Members [Member]
Defined Benefit Plan Disclosure [Line Items]
Company contributions to the Supplemental Executive Retirement Plan (SERP)	$315	$266	$0

SelfInsured_Plans_Additional_I

Self-Insured Plans - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Accruals For Self Insurance [Line Items]
Self insured plans for employees	$3,000
Workers Compensation [Member]
Accruals For Self Insurance [Line Items]
Self insured plans for employees	1,000
Accrued Liability	388	748
Medical Benefits [Member]
Accruals For Self Insurance [Line Items]
Accrued Liability	$3,506	$2,017

Commitments_and_Contingencies_1

Commitments and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]
Total royalty expense	$3,786	$1,818	$1,503
Rent expense for lease	$56,247	$34,195	$25,375

Commitments_and_Contingencies_2

Commitments and Contingencies - Schedule of Minimum Lease Payments Under Long-term Operating Lease Obligations (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Operating Leased Assets [Line Items]
2015	$56,537
2016	48,881
2017	37,747
2018	29,643
2019	16,011
Thereafter	6,484
Total	195,303
Equipment [Member]
Operating Leased Assets [Line Items]
2015	53,838
2016	46,503
2017	36,078
2018	28,171
2019	14,676
Thereafter	3,993
Total	183,259
Real Estate [Member]
Operating Leased Assets [Line Items]
2015	2,699
2016	2,378
2017	1,669
2018	1,472
2019	1,335
Thereafter	2,491
Total	$12,044

Recovered_Sheet1

Transactions with Related Parties - Additional Information (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Related Party Transaction [Line Items]
Purchases from an affiliated entity	$2,902	$1,382	$3,463
Management fees payment	825	2,821	1,000
Material Purchases [Member]
Related Party Transaction [Line Items]
Purchases from an affiliated entity	$44	$32	$334

Segment_Reporting_Additional_I

Segment Reporting - Additional Information (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Number of reportable segments	2
Total Assets	1,514,016	1,283,431
Customer Concentration Risk [Member] | Revenues [Member] | Haliburton [Member]
Segment Reporting Information [Line Items]
Consolidated net sales	19.00%	19.00%	25.00%
Customer Concentration Risk [Member] | Revenues [Member] | FTS International Services, Inc [Member]
Segment Reporting Information [Line Items]
Consolidated net sales	16.00%	11.00%
Customer Concentration Risk [Member] | Revenues [Member] | Baker Hughes [Member]
Segment Reporting Information [Line Items]
Consolidated net sales			11.00%
Proppant Solutions [Member]
Segment Reporting Information [Line Items]
Total Assets	1,271,700
Industrial & Recreational Products [Member]
Segment Reporting Information [Line Items]
Total Assets	63,270

Segment_Reporting_Summarized_F

Segment Reporting - Summarized Financial Information for Reportable Segments (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenue
Revenue	$353,756	$373,479	$334,291	$294,932	$274,478	$265,667	$228,194	$220,047	$1,356,458	$988,386	$885,190
Segment contribution margin
Segment contribution margin									465,252	331,085	354,088
Operating expenses excluded from segment contribution margin
Cost of sales										4,959
Selling, general, and administrative									74,475	47,440	36,745
Depreciation, depletion, and amortization									59,379	37,771	27,690
Stock compensation expense									16,571	10,133	11,434
Other operating expense (income)									3,163	2,826	-207
Interest expense, net	9,797	16,567	16,572	17,906	19,161	16,224	13,548	12,993	60,842	61,926	56,714
Loss on extinguishment of debt						11,760				11,760
Other non-operating expense	39	2,206	250	291	1,787	2,037	250	320	2,786	4,394	1,870
Income before provision for income taxes									248,036	149,876	219,842
Proppant Solutions [Member]
Revenue
Revenue									1,232,232	856,212	757,851
Segment contribution margin
Segment contribution margin									430,779	296,320	316,251
Industrial & Recreational Products [Member]
Revenue
Revenue									124,226	132,174	127,339
Segment contribution margin
Segment contribution margin									$34,473	$34,765	$37,837

Geographic_Information_Summary

Geographic Information - Summary of Revenue and Long-lived Assets (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Geographic Information [Line Items]
Revenue	$353,756	$373,479	$334,291	$294,932	$274,478	$265,667	$228,194	$220,047	$1,356,458	$988,386	$885,190
Long-lived assets	841,274				748,838				841,274	748,838
Domestic [Member]
Geographic Information [Line Items]
Revenue									1,254,071	920,636	795,372
Long-lived assets	832,280				737,652				832,280	737,652
International [Member]
Geographic Information [Line Items]
Revenue									102,387	67,750	89,818
Long-lived assets	$8,994				$11,186				$8,994	$11,186

Recovered_Sheet2

Quarterly Financial Data (Unaudited) - Schedule of Quarterly Financial Data (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share [Abstract]
Revenue	$353,756	$373,479	$334,291	$294,932	$274,478	$265,667	$228,194	$220,047	$1,356,458	$988,386	$885,190
Cost of sales	220,569	228,583	211,190	191,112	195,770	165,666	134,273	132,133	851,454	627,842	502,417
Operating expenses	62,140	50,525	43,930	36,745	42,442	33,932	29,710	26,504
Interest expense, net	9,797	16,567	16,572	17,906	19,161	16,224	13,548	12,993	60,842	61,926	56,714
Loss on extinguishment of debt						11,760				11,760
Other non-operating expense	39	2,206	250	291	1,787	2,037	250	320	2,786	4,394	1,870
Provision for income taxes	23,565	21,436	18,146	14,266	4,493	11,032	15,190	14,504	77,413	45,219	70,369
Net income	37,646	54,162	44,203	34,612	10,825	25,016	35,223	33,593	170,623	104,657	149,473
Less: Net income attributable to the non-controlling interest	-267	85	282	73	175	269	216	36	173	696	587
Net income attributable to FMSA Holdings Inc.	$37,913	$54,077	$43,921	$34,539	$10,650	$24,747	$35,007	$33,557	$170,450	$103,961	$148,886
Earnings per share, basic	$0.24	$0.34	$0.28	$0.22	$0.07	$0.16	$0.22	$0.22	$1.08	$0.67	$0.96
Earnings per share, diluted	$0.23	$0.32	$0.27	$0.21	$0.06	$0.15	$0.21	$0.20	$1.03	$0.63	$0.91
Weighted average common shares outstanding, basic	160,542,636	158,049,782	156,684,036	156,462,356	156,185,596	155,992,136	155,958,000	155,877,318	157,949,664	156,008,218	155,826,794
Weighted average common shares outstanding, diluted	167,025,422	166,911,474	165,642,288	165,082,614	164,826,390	164,600,392	164,508,830	164,601,208	166,277,124	164,637,554	164,328,324